Agenda packet, regular meeting, first session — Antioch City Council, September 8, 2026 (part 3 of 4)

I HEREBY CERTIFY that the foregoing resolution was passed and adopted by the City Council of the City of Antioch at a regular meeting thereof, held on th e 8th day of September 2026 by the following vote:

A
YES:

N
OES:

ABS
TAIN:

ABS
ENT:
___
_______________________________
MICHAEL J. MANDY

CITY CLERK OF THE CITY OF ANTIOCH
A2
Plan 1
ATTACHMENT "B"
B1
*OWNER/APPLICANT REQ. TO SELECT ONE OPTION FOR ALL OF THE FOLLOWING AND MARK THROUGH NON-APPLICABLE OPTIONS & VIEWS THROUGHOUT SET:

SPANISH COLONIAL

CALIFORNIA RANCH

STYLE OPTIONS
(ALL STYLES)

COVERED FRONT PORCH OPTION
(B) NO, SEE VIEW:
(A) YES

PLAN OPTIONS

WATER HEATER
(B) ALTERNATE WATER HEATER SPECIFIED BY A NEW T24 ENERGY REPORT IS PROVIDED AND APPROVED. MFR & MODEL: __________________________ ____
(A) WATER HEATER, SPECIFIED BRAND/MODEL PER TITLE 24

MID-CENTURY MODERN
(SEE ELEVATION SHEET FOR SPECIFIC MATERIALS SELECTION)
/4 A1-101
PROJECT SCOPE:

1. 2.

CONSTRUCTION OF A NEW DETACHED 1 STORY 350 SF ACCESSORY DWELLING UNIT WITH 0 BEDROOMS AND 1 BATH.

ALL THE WORK SHOWN IN THE DRAWINGS AND SPECIFICATIONS.

PROJECT DIRECTORY PROJECT INFORMATION

UTILITIES
ADDRESS:

CONTACT:

EMAIL:

PHONE:

RRM DESIGN GROUP
3765 S. HIGUERA ST, SUITE 102
SAN LUIS OBISPO, CA 93401
P:(805) 543-1794

ARCHITECT

RANDY RUSSOM
[email protected]

USER LICENSE AGREEMENT

SIGNATURE DATE

VICINITY MAP (TO BE PROVIDED BY OWNER OR APPLICANT)
_________________________________________WATER AND SEWER SERVICE

ELECTRICAL SERVICE

GAS SERVICE

SEWER SERVICE
_________________________________________
_________________________________________
_________________________________________
(TO BE PROVIDED BY APPLICANT OR OWNER)
*FOR BUILDING DEPARTMENT REVIEW, INITIAL WHEN SECTION HAS BEEN REVIEWED

1. 2.

3. 4.

5. ANY PROPOSED ENERGY STORAGE SYSTEM (ESS) SHALL FOLLOW SINGLE-FAMILY RESIDENTIAL MANDATORY REQ. SUMMARY SECTION 150.0(s) AND WILL REQUIRE A SEPARATE PERMIT TO BE PULLED BY APPLICANT.

VARIABLE CAPACITY HEAT PUMP COMPLIANCE OPTION (VERIFICATION DETAILS FROM VCHP STAFF REPORT, APPENDIX B, AND RA3) (PER TITLE 24).

THIS PLAN IS INTENDED FOR FLAT LOTS (SLOPING LESS THAN 10" ACROSS THE

LONGEST BUILDING DIMENSION), WITHOUT HIGHLY EXPANSIVE OR LIQUEFIABLE

SOILS, WHERE THE MAIN DWELLING UNIT IS SUPPORTED IN SHALLOW FOOTINGS WITH SLABS ON GRADE CONSTRUCTION. IF THE PROJECT SITE DEVIATES FROM ANY

OF THE AFOREMENTIONED QUALITIES, AS DETERMINED BY THE BUILDING OFFICIAL,

THERE PRE-APPROVED ADU FOUNDATION PLANS AND DETAILS ARE NOT APPLICABLE.

SUBMITTAL DOCUMENTS FOR DEFERRED SUBMITTAL ITEMS SHALL BE SUBMITTED TO THE BUILDING OFFICIAL. THE DEFERRED SUBMITTAL ITEMS SHALL NOT BE

INSTALLED UNTIL THEIR DESIGN AND SUBMITTAL DOCUMENTS HAVE BEEN APPROVED BY THE BUILDING OFFICIAL.

COMPLIANCE WITH THE DOCUMENTATION REQUIREMENTS OF THE 2025 ENERGY EFFICIENCY STANDARDS IS NECESSARY FOR THIS PROJECT. REGISTERED, SIGNED, AND DATED COPIES OF THE APPROPRIATE CF1R, CF2R, AND CF3R FORMS SHALL BE MADE AVAILABLE AT NECESSARY INTERVALS FOR BUILDING INSPECTOR REVIEW.

FINAL COMPLETED FORMS WILL BE AVAILABLE FOR THE BUILDING OWNER. _____________________________________
_____________________________________
PREPARED BY:

DATE PREPARED:

JOB NUMBER:

CARSTAIRS ENERGY

ENERGY COMPLIANCE
JUNE 24, 2026
26-062420
•
•
•
•
•
•
•
•
•
•
HERS VCHP:

HERS RATER WILL NEED TO FOLLOW THE VERIFICATION AND TESTING

PROTOCOL FOR THE VARIABLE CAPACITY HEAT PUMP CREDIT REQUIREMENTS,

INCLUDING BUT NOT LIMITED TO, VERIFIED REFRIGERANT CHARGE, VERIFIED MINIMUM HSPF AND EER/SEER, AND CAPACITY; DUCTLESS INDOOR UNITS

AND THE
COMPONENTS ARE WITHIN THE CONDITIONED ENVELOPE; AND AIRFLOW PROVIDED TO ALL HABITABLE SPACES (BEDROOMS AND LIVING SPACE).

THE FOLLOWING IS A SUMMARY OF THE FEATURES THAT MUST BE FIELD-VERIFIED

BY A CERTIFIED HERS RATER AS A CONDITION FOR MEETING THE MODELED ENERGY PERFORMANCE OF THIS COMPUTER ANALYSIS. REGISTERED CF2RS AND CF3RS ARE REQUIRED TO BE COMPLETED IN THE HERS REGISTRY.

QUALITY INSULATION INSTALLATION (QII)

INDOOR AIR QUALITY VENTILATION
KITCHEN RANGE HOOD TABLE 150.0-G160

VERIFIED REFRIGERANT CHARGE
AIRFLOW IN HABITABLE ROOMS (SC3.1.4.1.7)

VERIFIED HEAT PUMP RATED HEATING CAPACITY
WALL-MOUNTED THERMOSTAT IN ZONES GREATER THAN 150 FT2 (SC3.4.5)

DUCTLESS INDOOR UNITS LOCATED ENTIRELY IN CONDITIONED SPACE (SC3.1.4.1.8)

BATHROOM, KITCHEN, AND WHOLE HOUSE VENTILATION

WHEN PHOTOVOLTAIC SYSTEM IS REQUIRED (SEE PV SECTION FOR

SELECTION)
SEE SHEET S-103 FOR REQUIRED SPECIAL INSPECTIONS

A REGISTERED DESIGN PROFESSIONAL SHALL COMPLETE THE CITY OF ANTIOCH STATEMENT OF REQUIRED SPECIAL INSPECTIONS CERTIFICATE (FORM PLG-240) PRIOR TO PERMIT ISSUANCE. IDENTIFY THE TYPE OF WORK REQUIRING SPECIAL

INSPECTIONS IN THE PLANS AND THE INDIVIDUALS OR FIRMS RESPONSIB

LE FOR THE
SPECIAL INSPECTION ELEMENT(S). FOR FURTHER INSTRUCTIONS SEE S-103.

OWNER/APPLICANT HAS COMPLETED SPECIAL INSPECTION FORM
OWNER/APPLICANT SIGNATURE:____________________________
OWNER/APPLICANT TO SIGN & SUBMIT SEPARATE SUPPORTING DOCUMENT "USER LICENSE AGREEMENT" IN ADDITION TO SIGNING THIS USER AGREEMENT BELOW:

BY USING THESE PERMIT READY ACCESSORY DWELLING UNIT CONSTRUCTION

DOCUMENTS, THE USER AGREES TO RELEASE, HOLD HARMLESS, AND INDEMNIFY

THE CITY OF ANTIOCH, ITS ELECTED OFFICIALS AND EMPLOYEES, RRM DESIGN

GROUP, AND THE ARCHITECT OR ENGINEER WHO PREPARED THESE

CONSTRUCTION DOCUMENTS FROM ANY AND ALL CLAIMS, LIABILITIES, SUITS AND

DEMANDS ON ACCOUNT OF ANY INJURY, DAMAGE OR LOSS TO PERSONS OR

PROPERTY, INCLUDING INJURY OR DEATH, OR ECONOMIC LOSSES, ARISING OUT OF THE USE OF THESE CONSTRUCTION DOCUMENTS.

THE PLANS ATTACHED HERE ARE APPROVED FOR ONLY USE IN CITY OF ANTIOCH.

NO DEVIATIONS, ALTERATIONS, OR OPTIONS BEYOND THOSE SPECIFICALLY

INDICATED IN THE PLANS ARE ALLOWED WITHOUT PRIOR APPROVAL BY THE ISSUING JURISDICTION AND CHIEF BUILDING OFFICIAL. THIS SET OF PLANS SHALL NOT BE USED FOR A PUBLIC HOUSING PROJECT.

1. 2.

3. 4.

5. 6.

7. DETAILED SPRINKLER PLANS SHALL BE SUBMITTED TO THE FIRE PREVENTION BUREAU AND APPROVED PRIOR TO INSTALLATION. PLANS AND INSTALLATION MUST BE BY A C16 LICENSED SPRINKLER CONTRACTOR.

SECTION 903.3.1.3 NFPA 13D SPRINKLER SYSTEMS AUTOMATIC FIRE SPRINKLER SYSTEMS INSTALLED IN ONE- AND TWO-FAMILY DWELLINGS, GROUP R-3.

SECTION 903.2.8 GROUP R AN AUTOMATIC SPRINKLER SYSTEM INSTALLED IN ACCORDANCE WITH SECTION 903.3 SHALL BE PROVIDED THROUGHOUT ALL BUILDINGS WITH A GROUP R FIRE AREA.

SECTION 903.2.8.1 GROUP R-3 AN AUTOMATIC SPRINKLER SYSTEM INSTALLED IN ACCORDANCE WITH SECTION 903.3.1.3 SHALL BE PERMITTED IN GROUP R-3 OCCUPANCIES.

LOCATION AND SIZE OF WATER SERVICE UNDERGROUND SHALL BE INSTALLED AS SHOWN ON APPROVED FIRE SPRINKLER PLANS. A MINIMUM 1 INCH WATER SHALL BE INSTALLED.

A FIRE UNDERGROUND FLUSH CERTIFICATION SHALL BE REQUIRED AT FINAL INSPECTION.

A HYDRO INSPECTION OF THE FIRE SPRINKLER SYSTEM IS REQUIRED PRIOR TO FRAME INSPECTION. ONLY THE NEW PIPING SHALL BE TESTED.

FIRE PROTECTION

TRUSS CALCULATIONS
FIRE SPRINKLER (IF APPLICABLE, SEE FIRE SPRINKLERS SECTION.)

DEFERRED SUBMITTAL(S)
SITE INFORMATION:

APN:

LOT SIZE (SQ FT):

EXISTING USE:

LAND USE:

PROPOSED USE:

LOT COVERAGE

ACCESSORY
STRUCTURE(S) SF:

REAR: 4' - 0"
PRIMARY BUILDING SF: FRONT:

SIDES: 4' - 0"

SETBACKS
_____________
_____________
_____________
_____________
MIN.

REQUIRED: PROPOSED:

FIRE SPRINKLERS (WHEN REQUIRED) NOTES:

DOES THE PRIMARY RESIDENCE HAVE NFPA 13D SPRINKLERS?
NO: THEREFORE, THE PROPOSED ADU IS NOT REQUIRED TO BE SPRINKLERED YES: THEREFORE, THE PROPOSED ADU IS REQUIRED TO BE SPRINKLERED (TO BE PROVIDED BY

OWNER / APPLICANT)
BUILDING INFORMATION:

CONSTRUCTION TYPE: VB
MAX HEIGHT ALLOWED:

ZONING:

SPRINKLERED: (SEE FIRE SPRINKLER

SECTION ON THIS SHEET)
PROPOSED HEIGHT: _______
NUMBER OF STORIES: 1 OCCUPANCY GROUP: R-3
CITY OF ANTIOCH PRE-APPROVED ADU - PLAN 1

SHEET INDEX
G-001 TITLE SHEET - PLAN 1
G-101 GENERAL NOTES
G-102 GENERAL NOTES, ABBREVIATIONS, & SYMBOLS
G-201 CAL GREEN RESIDENTIAL MANDATORY MEASURES
G-202 CAL GREEN RESIDENTIAL MANDATORY MEASURES
T24-100 CAL GREEN RESIDENTIAL MANDATORY REQUIREMENTS
T24-101 ENERGY COMPLIANCE - PLAN 1
T24-102 ENERGY COMPLIANCE - PLAN 1
AS101 EXAMPLE SITE PLAN
AS102 ARCHITECTURAL SITE PLAN
A1-100 PLAN 1 RENDERINGS
A1-101 FLOOR PLAN 1
A1-111 MECHANICAL, & ELECTRICAL PLANS
A1-121 ROOF PLAN & REFLECTED CEILING PLAN - CAL RANCH
A1-122 ROOF PLAN & REFLECTED CEILING PLAN - MID-CENTURY MODERN A1-123 ROOF PLAN & REFLECTED CEILING PLAN - SPANISH COLONIAL A1-201 ELEVATIONS & SECTIONS - CAL RANCH
A1-202 ELEVATIONS & SECTIONS - MID-CENTURY MODERN
A1-203 ELEVATIONS & SECTIONS - SPANISH COLONIAL
A-901 ARCHITECTURAL DETAILS - COMMON
A-902 ARCHITECTURAL DETAILS - COMMON
A-903 ARCHITECTURAL DETAILS - COMMON
A-904 ARCHITECTURAL DETAILS - COLUMNS
A-905 ARCHITECTURAL DEATILS - CALIFORNIA RANCH
A-906 ARCHITECTURAL DETAILS - CALIFORNIA RANCH
A-907 ARCHITECTURAL DETAILS - MID-CENTURY MODERN
A-908 ARCHITECTURAL DETAILS - SPANISH COLONIAL
A-911 ARCHITECTURAL DETAILS - ASPHALT SHINGLE ROOF
A-911W ARCHITECTURAL DETAILS - ASPHALT SHINGLE ROOF - WUI A-912 ARCHITECTURAL DETAILS - S-TILE ROOF
A-912W ARCHITECTURAL DETAILS - S-TILE ROOF - WUI
A-921 REFERENCE - PRODUCT DATA - ROOF VENT
S-101 SHEET INDEX, ABBREVIATION & SYMBOLS
S-102 GENERAL NOTES
S-103 GENERAL NOTES, SPECIAL INSPECTION & TESTS
S-201 CAL RANCH ROUNDATION & ROOF FRAMING PLAN
S-211 MID CENTURY MODERN FOUNDATION & ROOF FRAMING PLAN S-221 SPANISH COLONIAL FOUNDATION & ROOF FRAMING PLAN
S-301 TYPICAL CONCRETE DETAILS
S-311 CONCRETE DETAILS
S-401 TYPICAL WOOD DETAILS
S-402 TYPICAL WOOD DETAILS
S-403 TYPICAL WOOD DETAILS
S-404 TYPICAL WOOD DETAILS
S-421 ROOF FRAMING DETAILS
S-422 ROOF FRAMING DETAILS
Grand total: 46
LOT COVERAGE SF:

FLOOR AREA RATIO:

BETWEEN
STRUCTURES:

HERS QII REQUIRED

OWNER / APPLICANT TO LIST SERVICE PROVIDERS IN SPACES BELOW (SEE SITE PLAN, SHEET AS101 FOR INFORMATION AND LOCATIONS OF ALL UTILITIES)

ELECTRICAL PANEL (SEE PLANS & SITE PLAN FOR LOCATION)
NOTE: SPECIFY IF THE ADU WILL HAVE ITS OWN SEPARATE UTILITY SERVICE INSTALLED OR IF THE ADU WILL BE SUB-FED FROM AN EXISTING ADEQUATE SERVICE.

PROVIDE COMPLETE ELECTRICAL LOAD CALCULATIONS FOR REVIEW. IF SUB-FED,

PLEASE PROVIDE A SECOND AND SEPARATE LOAD CALCULATION OF THE EXISTING SERVICE TO JUSTIFY IT IS ADEQUATE FOR THE ADDITIONAL LOADS. (B) A NEW ELEC. SUBPANEL CONNECTS TO THE ELEC. MAIN PANEL OF 220 AMP ON THE PRIMARY HOME WITH A 225 AMP MIN. BUSBAR RATING
(A) NEW ELEC. MAIN PANEL OF 200 AMP WITH 225 AMP MIN. BUSBAR RATING (C) NEW ELEC. MAIN PANEL MIN. 400 AMP DUAL METER AT PRIMARY HOUSE WITH A NEW ELEC. SUB-PANEL AT ADU THAT CONNECTS TO THE MAIN PAN EL

THE ADU AND PRIMARY DWELLING UNIT SHALL HAVE SEPARATE, INDEPENDENT WATER SUPPLY AND SANITARY SEWER SYSTEMS.

NOTE: A NEW SEPTIC SYSTEM IS ONLY PERMITTED WHEN NO PUBLIC SEWER IS DEEMED AVAILABLE; A PERCOLATION REPORT AND SEPTIC DESIGN ARE REQ.) IF NO, SELECT ONE OF THE FOLLOWING:

NEW SEWER LINES CONNECTED DIRECTLY TO PUBLIC RIGHT OF WAY.

NEW SEWER LINES BRANCHED OFF EXISTING MAIN LINES ON THE PROPERTY.

NOTE: SEE SITE PLAN CHECKLIST ON AS-101 AND SITE PLAN ON AS-102 FOR MORE INFORMATION AND LOCATIONS.

OWNER/APPLICANT SIGNATURE:__________________________
(SELECTIONS TO BE PROVIDED BY APPLICANT OR OWNER)
NEW WATER SUPPLY CONNECTED DIRECTLY TO PUBLIC RIGHT OF WAY.

NEW WATER SUPPLY BRANCHED OFF EXISTING MAIN LINES ON THE PROPERTY.

NOTE: ADU AND PRIMARY DWELLING UNIT SHALL HAVE SEPARATE, INDEPENDENT WATER SUPPLY. SEE SITE PLAN CHECKLIST ON AS-101 AND SITE PLAN ON AS-102 FOR MORE INFORMATION AND LOCATIONS.

PROJECT ADDRESS: (TO BE PROVIDED BY

OWNER / APPLICANT)
(TO BE PROVIDED BY

OWNER / APPLICANT)
NO NEW SEPTIC SYSTEM.

NEW SEPTIC SYSTEM; PROVIDE STAMPED DEH EXHIBIT. OWNER/APPLICANT REQUIRED TO PROVIDE DOCUMENTATION OF CITY OF ANTIOCH APPROVAL. (SELECTIONS TO BE PROVIDED BY APPLICANT OR OWNER)

ALL PLAN USERS MUST SUBMIT A COMPLETED USER LICENSE
AGREEMENT AT THE TIME OF APPLICATION SUBMITTAL.

NO, PV NOT REQUIRED PER CALIFORNIA ENERGY CODE SECTION
150.1(C)14 EXCEPTION (2) PV SYSTEM SIZE SPECIFIED BY SECTION 150.1(C)14 IS LESS THAN 1.8 KWDC.

PHOTOVOLTAIC SYSTEM (PV) (DEFERRED SUBMITTAL)

OWNER / APPLICANT TO PROVIDE THE TITLE REPORT

CALIFORNIA RANCH
SQUARE
FOOTAGE CONDITIONED?
PLAN 1 350 SF CONDITIONED
LANDING 16 SF UNCONDITIONED
DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:08:59 PM
TITLE SHEET - PLAN 1

PRE-APPROVED ADU

CITY OF ANTIOCH
G-001
08/19/26

PUBLIC SET

STAFF INITIALS

STAFF INITIALS
16' - 0"

STAFF INITIALSSTAFF INITIALS

STAFF INITIALS

SEE ELEVATIONS

WASTE WATER

WASTE SUPPLY

ELECTRICAL PANEL
ADDRESS:

CONTACT:

EMAIL:

PHONE:

RRM DESIGN GROUP
3765 S. HIGUERA ST, SUITE 102
SAN LUIS OBISPO, CA 93401
P:(805) 543-1794

STRUCTURAL

ENGINEER

JESSICA MEADOWS
[email protected]
ADDRESS:

CONTACT:

EMAIL:

PHONE:

APPLICANT

SERVICE PROVIDERS
SETBACK RESTRICTIONS - FIRE RATINGS:

NO
YES; IF YES, FIRE RATED WALL & PROJECTIONS REQUIRED PER 2025 CRC SECTION R302.1 FIRE RATED WALL DETAIL: 51/A-901 & 52-/A-901 IF YES, FIREBLOCKING IS REQUIRED IN PROJECTIONS, RAKES AND EAVES.

SEE DETAILS: 31/32/A-911, 31/32/A-911W, 11/12/21/22/A-913, 31/32/51/52/A-913W IS THE ADU LESS THAN 5' TO ANY PROPERTY LINE AND/OR LESS THAN 10' FROM ANY ADJACENT BUILDING OR STRUCTURE?

1. 2.

3. PORTIONS OF THE CITY OR COUNTY ARE LOCATED WITHIN A FHSZ. TO

DETERMINE IF YOUR STRUCTURE IS LOCATED IN A FHSZ, PLEASE VISIT CAL FIRE WEBSITE: HTTPS://OSFM.FIRE.CA.GOV/WHAT-WE-DO/COMMUNITY-

WILDFIRE-PREPAREDNESS-AND-MITIGATION/FIRE-HAZARD-SEVERITY-ZONES INDICATE BELOW WHAT ZONE YOUR STRUCTURE IS TO BE BUILT IN:

VERY HIGH HIGH MODERATE NONE

IF STRUCTURE IS LOCATED IN HIGH OR VERY HIGH SEVERITY ZONE, ALL CONSTRUCTION OF THE ADU STRUCTURE MUST COMPLY WITH CWUIC 504.

THIS PROTOTYPE ADU PLAN PROVIDES DESIGNS THAT COMPLY WITH PROVISIONS REQUIRED BY THE CWUIC 504. PLEASE SEE APPLICABLE DETAIL SHEETS: A-911W & A-912W
FIRE HAZARD SEVERITY ZONE (FHSZ) LEVEL:

FIRE SPRINKLERS:

SPANISH COLONIALMID-CENTURY MODERN
WILDLAND-URBAN INTERFACE:

SEE SHEET A1-201
SEE SHEET A1-202
SEE SHEET A1-203
OPTIONAL COVERED PORCH - CAL RANCH 60 SF UNCONDITIONED
OPTIONAL COVERED PORCH - MID-CENTURY MODERN 60 SF UNCONDITIONED OPTIONAL COVERED PORCH - SPANISH COLONIAL 72 SF UNCONDITIONED

ADDITIONAL INFORMATION

SPECIAL INSPECTIONS STAFF INITIALS
SOLAR READY REQUIREMENTS SHALL BE IMPLEMENTED. FOR MORE INFORMATION SEE "SOLAR READY NOTES" ON SHEET G-101.

FOR USE IN CITY OF ANTIOCH ONLY
B2
(E) STREET NAME

OVERALL DIMENSION OF EXISTING RESIDENCE
XX' - XX"
4' - 0" MIN. SETBACK
XX' - XX"XX' - XX"XX' - XX"

OVERALL DIMENSION OF EXISTING RESIDENCE
XX' - XX"XX' - XX"

OVERALL DIMENSION OF NEW ADU
XX' - XX"
XX' - XX" FROM ADU TO (E) RESIDENCE

OVERALL DIMENSION OF EXISTING RESIDENCE
XX' - XX"XX' - XX"
XX'-XX" (DISTANCE)
(E) SINGLE FAMILY

RESIDENCE EXAMPLE
(ADDRESS)
(FOOTPRINT SF)
(N) ACCESSORY

DWELLING UNIT

EXAMPLE
SXX° XX'X"E
XX'-XX" (DISTANCE)
NXX° XX'X"W
NXX° XX'X"W (PROPERTY LINE BEARINGS)
XX'-XX" (DISTANCE)
SXX° XX'X"E

SETBACK
MIN 4'
MIN 4' - 0" SETBACK
XX' - XX"
MIN. 5' - 0" MIN. 5' - 0"
(E) PROPERTY LINE

PROPERTY LINE

PROPERTY LINE
XX'-XX" (DISTANCE)
(E) SIDEWALK

EXAMPLE
(E) PROPERTY LINE
MIN. 4' - 0" SETBACK
XX' - XX"
(E) RETAINING WALL EXAMPLE
(DISTANCE FROM PROPERTY LINE TO (E) RESIDENCE
XX' - XX"

X XX X XXX X
(N) MECHANICAL EQUIPMENT LOCATION
EXAMPLE; NOT LESS THAN 30" OF

CLEARANCE IN WIDTH, DEPTH, & HEIGHT

SHALL BE PROVIDED TO ACCESS THE
EQUIPMENT. (2025 CMC SECTION 304.1)
(N) APPLICANT TO ILLUSTRATE AND

ANNOTATE PROPOSED APRONS,
LANDINGS, PORCHES, OVERHANGS, MECH.
/ ELEC. ITEMS AND PROPOSED ACCESS
POINTS

LOCATE ELECTRICAL (ALL) PANELS

SEE TITLE SHEET FOR PANEL OPTIONS AND
MAXIMUM AMPERAGE FOR THE PROPOSED ADU.
(E) EXISTING SWIMMING POOL

EXAMPLE (OWNER / APPLICANT

TO PROVIDE SF)

EASEMENT EXAMPLE
(ANY/ALL SHALL BE SHOWN)

SETBACK
XX' - XX"
XX' - XX"
MIN. 10'
(N) ASSUMED PROPERTY LINE
(E) SETBACK
(E) SETBACK
(E) SETBACK
XX'-XX" SETBACK

DISTANCE OF NEAREST POINT OF ADU TO CENTERLINE OF
IMAGINARY LINE BETWEEN THE TWO BUIDLINGS (UNDER 5' - 0" 1- HOUR FIRE-RATED WALL AND 1-HOUR FIRE-RATED EAVE REQUIRED).

DISTANCE OF NEAREST POINT OF ADU TO

ADJACENT PROPERTY LINE (WHEN UNDER
5' - 0," 1-HOUR FIRE-RATED WALL AND 1-
HOUR FIRE-RATED RAKE/EAVE REQUIRED).
(FOOTPRINT SF)

PROVIDE ALL DIMENSIONS FOR

ALL (E) AND/OR (N) PAVED AREAS

PROVIDE ALL DIMENSIONS, OF (E) DRIVEWAY(S)
XX' - XX"
XX' - XX"
XX' - XX"
XX' - XX"
(E) FENCE EXAMPLE
(PROVIDE DIMENSIONS)
(E) FENCE EXAMPLE
(PROVIDE DIMENSIONS)
XX
(E) SIDEWALK

EXAMPLE
(CENTERLINE OF STREET)

OWNER/APPLICANT TO

INDICATE MAIN ENTRANCE

SITE PLAN LEGEND

EASEMENTS

SETBACK

PROPERTY LINE (E) FENCEX X
(E) WALLS/

RETAINING WALLS

SITE PLAN CHECKLIST

DRAWING SCALE
SITE PLAN SHOULD BE DRAWN TO A MEASURABLE SCALE.

PROPERTY LINES
SHOW OUTLINE OF PROPERTY USING DASHED LINE IN LEGEND. INDICATE THE BEARING AND DISTANCE OF THE PROPERTY LINE.

LABEL YARDS

LABEL FRONT, REAR, SIDE YARDS, AS WELL AS DRIVEWAYS, PATHWAYS AND ANY OTHER HARDSCAPE.

SETBACKS

DIMENSION THE DISTANCE BETWEEN BUILDINGS AND PROPERTY LINES, AS WELL AS BUILDINGS TO OTHER STRUCTURES. SETBACKS TO SIDE AND REAR PROPERTY SIDE SHALL BE A MINIMUM OF (4' - 0").

EASEMENTS
REFER TO LEGEND. MUST INCLUDE ALL APPLICABLE EASEMENTS. PROPOSED STRUCTURE SHALL COMPLY WITH EASEMENT REQUIREMENTS.

PROVIDE THE EXACT LOCATION AND LABEL ALL OF THE EXISTING &

PROPOSED UTILITIES ON THE SITE PLAN

THIS INCLUDES BUT IS NOT LIMITED TO UTILITIES, POLES, SEPTIC, SEWER, DRAINS, ELECTRICAL, GAS METERS, LINES, AND ANY PHOTOVOLTATIC.

INDICATE SEWER ELEVATION OF LATERAL AND MAIN CONNECTION.

IF ON SEPTIC SYSTEM, PROVIDE DEPARTMENT OF ENVIRONMENTAL

HEALTH (DEH) EXHIBIT WITH LEACH LINES SHOWN AND AREA FOR NEW LEACH LINES. SEWER MAIN EXTENSION MAY BE REQUIRED. INCLUDE

LOCATIONS AND ALL ELEVATIONS OF PROPOSED SEPTIC / SEWER / LEACH LINES. PROVIDE INVERT ELEVATIONS AT CLEANOUT, SEWER MAIN

CONNECTION, ADU CONNECTION, AND AT ANY OTHER CONNECTION POINTS.

PLEASE SPECIFY ON THE PLANS IF THE ADU WILL HAVE NEW

INDEPENDENT SERVICES DIRECTLY FROM THE PUBLIC RIGHT OF WAY

CONNECTION OR IF THE SERVICES WILL BE BRANCHED OFF THE EXISTING MAIN LINES ON THE PROPERTY.

JUSTIFY PIPE SIZES SHOWN ON THE PLAN ARE ADEQUATE FOR THE PROPOSED ADU SERVICES. IF THE SERVICES ARE CONNECTED TO THE

EXISTING MAIN SERVICES, THEN PROVIDE JUSTIFICATION THAT THE

EXISTING MAINS CAN HANDLE THE NEW INCREASED FLOWS OF THE ADU FOR WATER SUPPLY AND SANITARY SEWER SYSTEMS. PLEASE USE 2025 CPC TABLE 610.3, TABLE 610.4, AND SECTION 610.5 FOR JUSTIFICATION.

NOTE, IF USING APPENDIX A SIZING CRITERIA, PLEASE INCLUDE THE CPC APPENDIX A CHART ON THE PLAN.

LABEL STREETS & SIDEWALKS

DIMENSION BUILDING SEPARATION

DIMENSION THE DISTANCE BETWEEN THE PROPOSED ADU AND ANY EXISTING

STRUCTURES

LOT COVERAGE CALCULATION

TOTAL FOOTPRINT AREA FOR STRUCTURES ON SITE / LOT AREA

LOCATION OF RAIN WATER LEADERS

THE ROOF DRAINS SHOULD DRAIN AWAY FROM THE PROPERTY LINES AND INTO THE LANDSCAPE AREA.

SCALE: 1/10" = 1' - 0"EXAMPLE SITE PLAN

SWIMMING POOLS

ALL EXISTING SWIMMING POOLS SHALL BE SHOWN ON THE SITE PLAN AND SHALL HAVE 10' MINIMUM SETBACK TO THE NEW ADU STRUCTURE.

FOOTPRINT OF ALL EXISTING BUILDINGS & STRUCTURES - PLOT THE EXISTING BUILDINGS ONSITE. THIS INCLUDES ALL STRUCTURES / PORCHES / GAZEBOS. INDICATE SQUARE FOOTAGE OF EXISTING RESIDENCE.

NORTH ARROW

PORCHES
THERE SHALL BE NO MORE THAN 30 INCHES MEASURED VERTICALLY TO THE

FLOOR OR GRADE BELOW (INCLUDING FLOORS, STAIRS, RAMPS, AND LANDINGS) ANYWHERE MEASURED LESS THAN 36 INCHES HORIZONTALLY TO THE EDGE OF THE PORCH/SLAB/SURFACE OF THE RAIL. INSECT SCREENING SHALL NOT BE CONSIDERED AS A GUARD.

1. 2.

3. 4.

5. 6.

7. 8.

9. 10.

11. 12.

13. 14.

REFER TO GENERAL NOTES SHEET G-101 FOR ADDITIONAL REQUIREMENTS

REFER TO STRUCTURAL PLANS FOR FURTHER INFORMATION

EMERGENCY ESCAPE AND RESCUE OPENINGS SHALL OPEN DIRECTLY INTO A PUBLIC WAY PER 2025 CRC, SECTION 308.1.

NOT LESS THAN 30" OF CLEARANCE IN WIDTH, DEPTH, & HEIGHT SHALL BE PROVIDED TO ACCESS EXTERIOR MECHANICAL EQUIPMENT. SHOW
LOCATION ON SITE PLAN & LABEL (2025 CMC SECTION 304.1 & 2025 CPC 504.3).

PROPOSED ADU IS TO BE FULLY ELECTRIC. INSTALLATION OF A GAS LINE TO THE PROPOSED ADU WILL NOT BE PERMITTED.

CALL BEFORE YOU DIG! CONTACT UNDERGROUND SERVICE ALERT (USA) AT 1-800-227-2600 AT LEAST 2 WORKING DAYS BEFORE EXCAVATING.

UNLESS OTHERWISE NOTED ON THE PLANS, FINISHED GROUND SURFACES SHALL BE GRADED TO DRAIN THE FINISHED SITE PROPERLY WITHIN 10-F EET
OF ANY BUILDING FOUNDATION WITH A SLOPE OF 5% AWAY FROM ANY BUILDING OR STRUCTURE. ALL EXTERIOR HARDSCAPE WITHIN 10-FEET OF A BUILDING FOUNDATION SHALL BE INSTALLED WITH A 2% MINIMUM SLOPE AWAY FROM ANY BUILDING OR STRUCTURE. DRAINAGE SWALES SHALL BE A

1.5% MINIMUM SLOPE. ALL GRADED SLOPES SHALL HAVE A MAXIMUM SLOPE OF 3H TO 1V (33%), UNLESS SHOWN OTHERWISE ON THE PLANS.

LOT GRADING SHALL CONFORM AT THE PROPERTY LINES AND SHALL NOT

SLOPE TOWARD PROPERTY LINES IN A MANNER WHICH WOULD CAUSE STORM WATER TO FLOW ONTO NEIGHBORING PROPERTY. HISTORIC

DRAINAGE PATTERNS SHALL NOT BE ALTERED IN A MANNER TO CAUSE DRAINAGE PROBLEMS TO NEIGHBORING PROPERTY.

NEW RAINWATER DOWNSPOUTS SHALL BE DISCONNECTED AND DIRECT RUNOFF TO A LANDSCAPED AREA. DOWNSPOUTS MAY BE CONNECTED TO A

POP-UP DRAINAGE EMITTER IN THE LANDSCAPED AREA OR MAY DRAIN TO

SPLASH BLOCKS OR COBBLESTONES THAT DIRECT WATER AWAY FROM THE BUILDING.

CONTRACTOR TO FIELD VERIFY EXISTING DRAINAGE. IF THE EXISTING

DRAINAGE SYSTEM IS DAMAGED DURING EXCAVATION, CONTRACTOR SHALL

REPAIR AND/OR REROUTE DRAINAGE SYSTEM AND CONNECT TO EXISTING DRAINAGE FACILITY AS NECESSARY.

EXISTING PUBLIC IMPROVEMENTS THAT ARE DAMAGED BY THE PROJECT CONSTRUCTION SHALL BE REPAIRED OR REPLACED. EXISTING DAMAGED

PUBLIC IMPROVEMENTS WITHIN THE PROJECT LIMITS SHALL BE REPAIRED

OR REPLACED EVEN IF THE DAMAGE OCCURRED PRIOR TO THE START OF CONSTRUCTION.

EROSION AND SEDIMENT CONTROL FACILITIES SHALL BE INSTALLED PRIOR TO OCTOBER 1 AND SHALL BE MAINTAINED DAILY UNTIL APRIL 30. THESE

FACILITIES SHALL CONTROL AND CONTAIN EROSION-CAUSED SILT DEPOSITS

AND PROVIDE FOR THE SAFE DISCHARGE OF SILT-FREE STORM WATERS INTO EXISTING STORM DRAIN FACILITIES. EROSION AND SEDIMENT CONTROL

SUPPLIES MUST BE KEPT ON-SITE DURING THE DRY SEASON AND EMPLOYED, AS NECESSARY PRIOR TO AND DURING RAIN EVENTS.

SEASONALLY APPROPRIATE BEST MANAGEMENT PRACTICES FOR THE

FOLLOWING SITE MANAGEMENT CATEGORIES MUST BE IMPLEMENTED YEAR- ROUND: 1) EROSION CONTROL; 2) RUN-ON AND RUN-OFF CONTROL; 3) SEDIMENT CONTROL; 4) GOOD SITE MANAGEMENT; AND 5) NON-
STORMWATER MANAGEMENT.

AN ENCROACHMENT PERMIT WILL BE REQUIRED FOR ANY CONSTRUCTION

ACTIVITY WITHIN A PUBLIC STREET RIGHT OF WAY THAT HAS BEEN ACCEPTED BY THE CITY.

SITE PLAN GENERAL NOTES

LOCATION OF ELECTRICAL PANEL

SEE COVER SHEET FOR PANEL OPTION AND MAXIMUM AMPERAGE FOR THE PROPOSED ADU. ADDITIONAL CALCULATIONS MY BE REQUIRED BASED ON CHOSEN ELECTRICAL PANEL.

DRIVEWAY / PAVED ACCESS

SHOW THE PROPOSED (OR EXISTING) DRIVEWAY / PAVED ACCESS TO THE PROPOSED ADU.
(FOR PLANNING STAFF ONLY) INITIAL WHEN THIS SHEET HAS BEEN REVIEWED. STAFF INITIALS:________________ NOTE: THIS IS AN EXAMPLE SITE PLAN FOR AN INTERIOR
LOT. EXACT LAYOUT, DIMENSIONS, AND BEARINGS SHALL
BE PROVIDED BY OWNER/APPLICANT.
(E) EXISTING (N) NEW
DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:09:11 PM

EXAMPLE SITE PLAN

PRE-APPROVED ADU

CITY OF ANTIOCH
AS101
08/19/26

PUBLIC SET
1-HR FIRE CONSTRUCTION

GRADING & DRAINAGE

LOTS SHALL BE GRADED TO DRAIN SURFACE WATER AWAY FROM THE FOUNDATION WALLS. THE GRADE SHALL FALL A MINIMUM OF 6 ” WITHIN THE FIRST 10 FT. (5% SLOPE). WHERE LOT LINES, WALLS, SLOPES OR OTHER PHYSICAL BARRIER PROHIBIT 6” OF FALL WITHIN 10 FT., DRAINS OR SWALES

SHALL BE CONSTRUCTED TO ENSURE DRAINAGE AWAY FROM THE
STRUCTURE. 2025 CRC R401.3, 2025 CBC 1804.4

NEW STRUCTURE ADDRESS
NEW STRUCTURE SHALL BE PROVIDED WITH A NEW APPROVED ADDRESS.

THE ADDRESS SHALL BE LEGIBLE AND PLACED IN A POSITION THAT IS VISIBLE FROM THE STREET OR ROAD FRONTING THE PROPERTY. EACH CHARACTER SHALL BE NOT LESS THAT 4" IN HEIGHT WITH A STROKE WIDTH F NOT LESS THAN 1/2" 2025 CRC SECTION R308.1
IS (N) ADU LESS THAN 5' TO ANY PROPERTY LINE OR 10' FROM ANY ADJACENT BUILDING OR STRUCTURE:

YES, IF YES, FIRE-RATED WALL REQUIRED PER 2025 CRC R302.1 AT LOCATIONS WHERE THE ADU IS LESS THAN 5' FROM THE PROPERTY LINE OR LESS THAN 10' FROM ANY ADJACENT BUILDING OR STRUCTURE.

FIRE RATED WALL DETAILS: 51/A-901 & 52-/A-901
FIREBLOCKING IS REQUIRED IN PROJECTIONS, RAKES AND EAVES. SEE DETAILS: 31/32/A-911, 31/32/A-911W, 11/12/21/22/A-913, 31/32/51/52/A-913W IF YES, PROJECTIONS ARE REQUIRED TO BE 1-HOUR CONSTRUCTION.

HOWEVER, THE FIRE-RESISTANCE RATING SHALL BE PERMITTED TO BE REDUCED TO 0 HOURS ON THE UNDERSIDE OF THE EAVE OVERHANG, IF

FIREBLOCKING IS PROVIDED FROM THE WALL TOP PLATE TO THE

UNDERSIDE OF THE ROOF SHEATHING IF ONE OF THE FOLLOWING SEPARATION DISTANCES ARE MET IN APPROPRIATE TABLE: TABLE 302.1(1) & TABLE 302.1(2).

A) NON-SPRINKLERED & FIRE SEPARATION DISTANCE

PROJECTIONS ARE
≥5'-0"

B) SPRINKLERED & FIRE SEPARATION DISTANCE

PROJECTIONS ARE
≥3'-0"

NO, NO FURTHER ACTION NEEDED

FOOTPRINT OF PROPOSED ADU - PLOT PROPOSED ADU BUILDING
FOOTPRINT. INCLUDE ANY OPTIONAL PORCHES IF SELECTED. INDICATE SQUARE FOOTAGE OF PROPOSED ADU.

IMPERVIOUS SURFACES
IMPERVIOUS SURFACES WITHIN 10' OF THE BUILDING FOUNDATION SHALL BE SLOPED A MINIMUM OF 2% AWAY FROM THE BUILDING. 2025 CRC R401.3, 2025 CBC 1804.4

FOR USE IN CITY OF ANTIOCH ONLY
B3
SCALE:SITE PLAN NORTH ARROW
SITE PLAN TO BE PROVIDED BY APPLICANT REFER TO AS101 FOR EXAMPLE SITE PLAN DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:09:11 PM

ARCHITECTURAL SITE PLAN

PRE-APPROVED ADU

CITY OF ANTIOCH
AS102
08/19/26

PUBLIC SET

FOR USE IN CITY OF ANTIOCH ONLY
B4
PLAN 1 - SPANISH COLONIAL
PLAN 1 - CALIFORNIA RANCH
DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:09:11 PM
PLAN 1 RENDERINGS

PRE-APPROVED ADU

CITY OF ANTIOCH
A1-100
08/19/26

PUBLIC SET
PLAN 1 - MID-CENTURY MODERN

FOR USE IN CITY OF ANTIOCH ONLY
B5

DOOR DETAIL REFERENCES

HEAD JAMB

LAP SIDING

BOARD & BAT
STUCCO

THRESHOLD

STONE VENEER
/12 A-905 /13 A-905
/12 A-908 /13 A-908
/12 A-907 /13 A-907
/52 A-907 /53 A-907
/24 A-901

WINDOW DETAIL REFERENCES

HEAD JAMB SILL

BOARD & BATTEN
STUCCO

LAP SIDING

STONE VENEER

FLASHING
/31 A-907 /32 A-907 /33 A-907
/22 A-907 /23 A-907 /24 A-907
/22 A-908 /23 A-908 /24 A-908
/22 A-905 /23 A-905 /24 A-905 / /11 A-906
2 B
4' - 0" 5' - 3"
4' - 0"

LIVING WH
01 3
A1-203
9 A1-203
9 A1-201

MCM SPANISH

COLONIAL
CAL
RANCH
G03
9 A1-202
3 A1-201
3 A1-202

MCM SPANISH

COLONIAL
CAL
RANCH

WALL LEGEND
EXTERIOR - 5 1/2" WOOD STUD W/ PLYWOOD SHEATHING AND FINISH, SEE ELEV. FOR (EXT.) FINISH. ONE LAYER GYP. WALL BOARD INT. SEE T24 FOR
INSULATION. SEE DETAIL: & FOR 1-HR WALL ASSEMBLY

WHEN REQUIRED
INTERIOR - 3 1/2" WOOD STUD W/ ONE LAYER GYP. WALL BOARD EACH SIDE.

ADD BLOCKING AS NEEDED IN THESE LOCATIONS PER DETAIL(S):14/A-903 EXTERIOR - DOUBLE 3 1/2" WOOD STUD W/ PLYWOOD SHEATHING (WITH 2" AIR SPACE) AND FINISH ON BOTH SIDES, SEE ELEV. FOR (EXT.) FINIS H.

NOTE: SEE MANUFACTURER LISTINGS FOR IMPROVED ACOUSTIC, MOISTURE, MOLD, & MILDEW-RESISTANT PERFORMANCE PRODUCTS.

NOTE: 5/8" GYP ATTACHED DIRECTLY TO STUDS IS ASSUMED U.N.O.

VERIFY PRODUCT SELECTIONS & REQUIREMENTS, THICKNESS, AND LOCATIONS ON PLANS WITH CONTRACTOR BEFORE CONSTRUCTION. ANY INCREASE IN WALL THICKNESS IS NOT PERMITTTED WHERE MIN. CLEARANCES ARE REQUIRED. INSTALL PER MANUFACTURER'S SPECIFICATIONS.

NOTE: SEE GYPSUM.ORG FOR MORE INFORMATION. POTENTIAL PRODUCTS CAN BE FOUND (BUT ARE NOT LIMITED TO) THE FOLLOWING MANUFACTURERS:

CERTAINTEED.COM, PABCOGYPSUM.COM, GOLDBONDBUILDING.COM. /52 A-901 /51 A-901
5 A1-201
1 A1-201
4 A1-201
A
A
1 1
25' - 0"
14' - 0"
5' - 8" 8' - 4"
9' - 0" 5' - 0" 11' - 0"
3' - 2" 3' - 5" 7' - 5"
5' - 0" 3' - 9"
2 2
B
B
BED 1
CL.

LAUNDRY
BATH
WH

KITCHEN/DINING
LIVING
3' - 6"
25' - 0"
3' - 1" 2' - 7" 8' - 4"
1' - 10"
1' - 4" 3' - 5" 2' - 2" 5' - 3"
2' - 2"
2' - 8"
5' - 0" 4' - 0" 5' - 0" 3' - 4" 7' - 8"
EQ EQ
14' - 0"
OPT. COVERED
PORCH
12' - 0" 3' - 6"
01 05
02 01
02 0403
04 05
035' - 0"
5' - 6" 5' - 0" 1' - 6"
2 A1-203
8 A1-201
8 A1-201
8 A1-203
8 A1-203
4 A1-203
2 A1-201
1 A1-203
5 A1-203

NO COVERED PORCH

OPTION SEE
/4 A1-101
CAL
RANCH
MID-

CENTURY
MODERN
CAL
RANCH
7 A1-201
7 A1-201
7 A1-203
7 A1-203

SPANISH

COLONIAL
5 A1-202
4 A1-202
1 A1-202
8 A1-202
8 A1-202
2 A1-202
7 A1-202
7 A1-202
MID-

CENTURY
MODERN
CAL
RANCH

SPANISH

COLONIAL
MID-

CENTURY
MODERN

SPANISH

COLONIAL
CAL
RANCH
MID-

CENTURY
MODERN

SPANISH

COLONIAL
MID-

CENTURY
MODERN
CAL
RANCH

SPANISH

COLONIAL
MID-

CENTURY
MODERN
CAL
RANCH

SPANISH

COLONIAL

SPANISH

COLONIAL

MID-CENTURY
MODERN
CAL
RANCH

SPANISH

COLONIAL

MID-CENTURY
MODERN
CAL
RANCH
C01
C04A03B02A06
A05
A07
B14
B06 B12 C12
T12
B16
B17
B04C19
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ A-903
11 M02
B18
A
2 B
OPT. COVERED
PORCH
1' - 0"5' - 0"
7' - 0" 1' - 9" 8' - 6" 1' - 9" 3' - 6"
12' - 0"
1' - 6"3' - 0"1' - 6"

LIVING WH
01 01
BATH
5 A1-203
7 A1-203
1 A1-203
2 B
OPT. COVERED
PORCH
12' - 0" 3' - 6"
LIVING
5' - 0"
01 01
5 A1-202
8 A1-202
1 A1-202
A

HORIZONTAL SLIDER
EQ EQ
PER SCHED.

PER SCHED.

DOUBLE HUNG
PER SCHED.

PER SCHED.

TYPE A (EXAMPLE)

SOLID CORE WOOD

ENTRY DOOR

EXTERIOR
T
TYPE C

SLIDING GLASS

EXTERIOR
T
TYPE D

HOLLOW CORE
WOOD

INTERIOR
TYPE F

HOLLOW CORE WOOD
VENTED (MIN. 100 IN
2 OPENING)

INTERIOR
TYPE E

HOLLOW CORE WOOD

BI-PASS DOUBLE

INTERIOR
TYPE B

SOLID CORE

WOOD EXTERIOR
(VENT AS REQ.)
TYPE G

HOLLOW CORE WOOD
BIFOLD

INTERIOR
NO. TYPE
DOOR

REMARKSWIDTH HEIGHT
01 A 3' - 0" 6' - 8" 1,2
02 B 2' - 0" 6' - 8" 5
03 F 2' - 6" 6' - 8" 4
04 G 4' - 0" 7' - 0"
05 D 3' - 0" 6' - 8"
NO. TYPE
SIZE

HEAD HEIGHT REMARKSWIDTH HEIGHT
01 A 5' - 0" 4' - 0" 6' - 8"
02 A 4' - 0" 1' - 6" 6' - 8" 2, 4
03 A 5' - 0" 4' - 0" 6' - 8" 1
04 A 3' - 0" 3' - 0" 6' - 8" 2
05 B 3' - 0" 4' - 0" 6' - 8"

WINDOW SCHEDULE

DOOR SCHEDULE
SCALE: 1/4" = 1'-0"A1-101
OPTION - NO COVERED FRONT PORCH4
A03 30" WIDE FREE STANDING ELECTRIC RANGE OVEN. VENT TO EXTERIOR, STAINLESS STEEL.

A05 REFRIGERATOR LOCATION. PROVIDE 36" SPACE WITH ROUGH PLUMBING FOR ICE MAKER (RECESS IN WALL) OR PER OWNER'S SPECIFICATIONS.

A06 24" WIDE FRONT CONTROL UNDERCOUNTER DISHWASHER.

A07 STACKED WASHER/DRYER MACHINE LOCATION. PROVIDE WASTE AND WATER IN RECESSED WALL BOX. PROVIDE DRYER VENT. VENT TO OUTSIDE AIR.

B02 30" SINGLE COMPARTMENT UNDER-MOUNT KITCHEN SINK W/ GARBAGE DISPOSAL. REFER TO WATER EFFICIENCY REQUIREMENTS ON CALGREEN CODE NOTES SHEET.

B04 LAVATORY SINK. REFER TO WATER EFFICIENCY REQUIREMENTS ON CALGREEN CODE NOTES SHEETS.

B06 32" x 60" x 72" TUB AND SHOWER COMBINATION. MODEL BY BUILDER.

PROVIDE SHOWER ROD.

B12 WATER CLOSET. REFER TO WATER EFFICIENCY REQUIREMENTS ON CALGREEN CODE NOTES SHEETS. WATER CLOSET SHALL NOT BE SET CLOSER THAN 15" FROM ITS CENTER TO A SIDE WALL OR OBSTRUCTION PER CPC, SECTION 402.5.

B14 40 GALLON TANK WATER HEATER. REFER TO TITLE 24 FOR ADDITIONAL INFORMATION.

B16 ELECTRIC PANEL LOCATION. PROVIDE PROTECTION PER CPC 507.25 & CMC 305.1.1, SEE GENERAL MEP NOTES 7 & 8 ON SHEET A-111 FOR MORE INFO.

B17 MULTI-ZONE HEAT PUMP CONDENSER UNIT. REFER TO PLANS FOR LOCATION OF INDOOR FAN COIL UNITS. REFER TO TITLE 24 FOR ADDITIONAL INFORMATION. PROVIDE CONCRETE PAD MIN. 6" LARGER THAN UNIT IN EACH DIRECTION, 3" MIN. ABOVE GRADE. PROVIDE PROTECTION PER CPC 507.25 & CMC 305.1.1, SEE GENERAL MEP NOTES 7 & 8 ON SHEET A-111 FOR MORE INFO. SEE DETAIL 53/A-902.

B18 FAN COIL @ 80" A.F.F. TO BOTTOM OF UNIT, PROVIDE DEDICATED WALL

OUTLET, INSTALL PER MANUFACTERER'S SPECIFICATIONS, REFER TO PLANS FOR LOCATION OF OUTDOOR CONDENSING UNIT. REFER TO TITLE 24 FOR ADDITIONAL INFORMATION.

C01 SINGLE WOOD SHELF AND POLE.

C04 36" HIGH BASE CABINET AND COUNTERTOP.

C12 22" DEEP VANITY
C19 MIRROR. THE LENGTH OF THE VANITY OR PEDESTAL X 80" AFS. UNO.

VERIFY WITH THE ELECTRICAL PLAN FOR LOCATION OF OUTLETS WHICH REQUIRE A CUT-OUT., PROVIDE 2X6 BACKING AT BATHROOM WALL

ATTACHEMENTS
G03 CONCRETE LANDING. SLOPE 1/4"/FT AWAY FROM THE BUILDING. MUST BE AT LEAST AS WIDE AS DOOR AND 3' DEEP.

M02 DOWNSPOUT TO SPLASH BLOCK BELOW. SEE DETAIL 23/A-901.

T12 WOOD POST, SEE STRUCTURAL - REQUIRED: PRIMER & 2 COATS OF EXTERIOR GRADE PAINT.

KEYNOTES

WINDOW TYPE
SCALE: 1/4" = 1'-0"A1-101
FLOOR PLAN W/ COVERED PORCH - CALIFORNIA RANCH1
SCALE: 1/4" = 1'-0"A1-101
COVERED PORCH - SPANISH COLONIAL3
DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:09:13 PM
FLOOR PLAN 1

PRE-APPROVED ADU

CITY OF ANTIOCH
A1-101
08/19/26

PUBLIC SET

1. 2.

3. 4.

5. 6.

REFER TO FLOOR PLANS FOR WINDOW LOCATIONS.

CONTRACTOR TO VERIFY EXACT ROUGH OPENING SIZES PRIOR TO FABRICATION OF ROUGH OPENINGS.

ALL GLAZING IS DOUBLE PANE UNLESS OTHERWISE NOTED.

EGRESS WINDOWS SHALL HAVE A CLEAR OPENING WITH THE BOTTOM OF THE CLEAR OPENING NOT GREATER THAN 44" AFF, MIN. NET CLEAR OPENING FOR EMERGENCY ESCAPE SHALL BE 5.7 S.F. EXCEPT: 5 S.F. MIN. AT GROUND FLOOR. MINIMUM NET CLEAR OPENING DIMENSIONS: HEIGHT: 24", WIDTH: 20". (2025 CRC SEC. R319.2) EMERGENCY ESCAPE AND RESCUE OPENINGS SHALL OPEN DIRECTLY INTO A PUBLIC WAY PER 2025 CRC, SECTION 319.1.

GLAZING IN WALLS ADJACENT TO BATHTUB / SHOWER WHERE THE BOTTOM EXPOSED EDGE OF THE GLAZING IS LESS THAN 60" MEASURED VERTICALLY ABOVE ANY STANDING OR WALKING SURFACE SHALL BE SAFETY GLAZING. (2025 CRC SEC. R324.4.5)

REFER TO WINDOW SCHEDULE AND WINDOW LEGEND FOR MORE
INFORMATION.

WINDOW GENERAL NOTES

7. IF STRUCTURE IS IN A WUI ZONE OR FHSZ, WINDOW MUST COMPLY WITH

BE CONSTRUCTED OF MULTI-PANE GLAZING WITH A MINIMUM OF ONE TEMPERED PANE (2025 CWUIC SEC. 504.8)

8. REFER TO ENERGY COMPLIANCE REPORTS TO VERIFY U-FACTOR, SHGC AND ADDITIONAL WINDOW REQUIREMENTS. ALL OPENINGS TO BE
U-FACTOR = (.27) , SHGC = (.23). BUG SCREEN REQUIRED (PER TITLE 24).

1. 2.

3. 4.

5. A.

6. REFER TO PLANS FOR LOCATION OF DOORS.

VERIFY ROUGH OPENING SIZE WITH DOOR MANUFACTURER SPECIFICATIONS PRIOR TO CONSTRUCTION.

CONTRACTOR TO VERIFY ACTUAL DOOR SIZE TO FIT FINISH OPENING PRIOR TO FABRICATION OF DOOR AND FINISH OPENING.

FIRE RATED DOORS SHALL BE SOLID WOOD OR SOLID HONEYCOMB CORE STEEL DOOR 1-3/8" THICK OR COMPLIANT WITH 2025 CRC SECTION R302.5.1.

DOORS SHALL BE SELF-CLOSING AND SELF-LATCHING WITH WEATHER STRIPPING TO BE TIGHT FITTING.

EXTERIOR DOORS SHALL EITHER HAVE A FIRE-RESISTANCE RATING OR MUST COMPLY WITH THE FOLLOWING REQUIREMENTS:

STILES AND RAILS SHALL NOT BE LESS THAN 1-3/8" THICK.

PANELS SHALL NOT BE LESS THAN 1-1/4" THICK, EXCEPT FOR THE

EXTERIOR PERIMETER OF THE PANEL SHALL BE PERMITTED TO TAPER TO A TONGUE OF NOT LESS THAN 3/8" THICK.

GLAZING IN DOORS SHALL BE TEMPERED PER 2025 CRC SECTION R324.4.1.

PANES INDICATED IN DOOR LEGEND WITH (T).

8. ALL EMERGENCY ESCAPE AND RESCUE OPENINGS SHALL BE MAINTAINED

FREE OF ANY OBSTRUCTIONS OTHER THAN THOSE ALLOWED BY THIS

SECTION AND SHALL BE OPERATIONAL FROM THE INSIDE OF THE ROOM WITHOUT THE USE OF KEYS, TOOLS, OR SPECIAL KNOWLEDGE. 2025 CRC R319.1.1.

DOOR GENERAL NOTES

1. 2.

3. 4.

5. EXTERIOR DOOR.

GLAZING PER DOOR TYPES. REFER TO GENERAL DOOR NOTE #6
OPTIONAL DOOR. SEE TITLE SHEET FOR SELECTIONS FOR MORE INFO.

REQUIRED OPENING OF NOT LESS THAN 100 IN
2 FOR MAKEUP AIR SHALL BE
PROVIDED IN THE DOOR OR BY APPROVED MEANS. [CMC SEC. R504.4.1]

VENT DOOR AS REQUIRED PER WATER HEATER MANUFACTURER

REQUIREMENTS / SPECIFICATIONS

DOOR REMARKS

1. 2.

3. 4.

REQUIRED EGRESS WINDOW. REFER TO WINDOW GENERAL NOTE #4 FOR ADDITIONAL INFORMATION.

WINDOW INCLUDES BOTH PANES TEMPERED GLAZING.

OPTIONAL WINDOW. SEE TITLE SHEET FOR SELECTIONS FOR MORE INFO. AT

LEAST ONE EGRESS OPENING REQUIRED AT ALL BEDROOMS, SEE GENERAL WINDOW NOTE #5 FOR EGRESS REQUIREMENTS.

REQUIRED TO PROVIDE OBSCURE / PRIVACY GLASS.

WINDOW REMARKS

1. 2.

3. 4.

5. 6.

7. 8.

9. 10.

11. 12.

13. 14.

REFER TO GENERAL NOTES SHEET G-101 AND G-102 FOR ADDITIONAL REQUIREMENTS.

REFER TO STRUCTURAL PLANS FOR FURTHER INFORMATION.

REFER TO MECHANICAL PLANS FOR FURTHER INFORMATION.

REFER TO ELECTRICAL PLANS FOR FURTHER INFORMATION.

REFER TO PLUMBING PLANS FOR FURTHER INFORMATION.

ALL FURNITURE AND EQUIPMENT IS BY OWNER AND IS SHOWN FOR COORDINATION PURPOSES ONLY.

DIMENSIONS ARE TO FACE OF SHEATHING UNLESS SPECIFICALLY NOTED OTHERWISE.

PROVIDE ADEQUATE BLOCKING IN WALLS FOR CABINETS AND OTHER WALL

MOUNTED ACCESSORIES INCLUDING BUT NOT LIMITED TO HANDRAILS, SHELVING AND BATHROOM FIXTURES.

DOOR AND WINDOW DIMENSIONS ARE CENTERED AT OPENINGS.

WHERE DOOR IS LOCATED WITHOUT DIMENSION AT THE CORNER OF A ROOM IT SHALL BE 4" FROM FACE OF FRAMING OF ADJACENT WALL TO ROUGH DOOR OPENING.

WHERE RECESSED FIXTURES OCCUR IN WALLS OR HORIZONTAL

ASSEMBLIES, THE FIRE RATING OF THOSE ASSEMBLIES SHALL BE MAINTAINED.

AT ALL PENETRATIONS AND INTERSECTIONS OF FIRE-RATED PARTITIONS,

PROVIDE FIRE SEALANT AND/OR FIRE STOPPING TO MAINTAIN CONTINUITY OF PARTITION RATING.

PER 2025 CRC R318.3 FLOORS OR LANDINGS AT EXTERIOR DOORS SHALL BE

AT LEAST AS WIDE AS DOOR SERVED AND SHALL PROVIDE A LENGTH IN THE DIRECTION OF TRAVEL EQUAL TO 36 INCHES MINIMUM. SLOPE OF EXTERIOR LANDINGS SHALL NOT EXCEED 1/4" PER FOOT (2% SLOPE).

PER 2025 CRC 328.1.1 REINFORCEMENT FOR GRAB BARS SHALL BE PROVIDED IN AT LEAST ONE BATHROOM. 1. REINFORCEMENT SHALL BE

SOLID LUMBER OR OTHER CONSTRUCTION MATERIALS APPROVED BY THE ENFORCING AGENCY. 2. REINFORCEMENT SHALL NOT BE LESS THAN 2X8 INCH NOMINAL LUMBER OR OTHER MATERIAL PROVIDING EQ. HT. AND CAPACITY. REINFORCEMENT ABOVE THE FINISHED FLOOR FLUSH WITH THE WALL FRAMING. 3. WATER CLOSET REINFORCEMENT SHALL BE INSTALLED

ON BOTH SIDE WALLS OF THE FIXTURE, OR ONE SIDE WALL AND THE BACK WALL. 4. SHOWER REINFORCEMENT SHALL BE CONTINUOUS WHERE WALL FRAMING IS PROVIDED. 5. BATHTUB AND COMBINATION BATHTUB/SHOWER

REINFORCEMENT SHALL BE CONTINUOUS ON EACH END OF THE BATHTUB AND THE BACK WALL. ADDITIONALLY, BACK WALL REINFORCEMENT FOR A

LOWER GRAB BAR SHALL BE PROVIDED WITH THE BOTTOM EDGE LOCATED NO MORE THAN 6 INCHES ABOVE THE BATHTUB RIM. REFER TO SHEET A-903 FOR MORE INFORMATION.

FLOOR PLAN GENERAL NOTES
SCALE: 1/4" = 1'-0"A1-101
COVERED PORCH - MID-CENTURY MODERN2

DOOR LEGEND

FOR USE IN CITY OF ANTIOCH ONLY
B6
240V
GFI
VS F
IAQ

FD AFIAFI
AFI
AFI
AFI
AFI
240V
GFI
WP
GFI
EXT
+84
A3D

AFI AFI
AFI
GFIGFI
+42"
240V
GFI
FMW
GFI
GFI
+42"
3D
D
SD
FC
SD/MA
FC
EXT
+84
WP
GFI
240V
WP
GFI
CW
CW
CW

CW CWCW HW HW
HW IM
HW
IAQ
AFI
240V
GFI
GFI
WP
GFI
J
SD
SD/MA
VS
J
P
VP
EXT
+84
CW
HB
HB
SOV
HW
F
H
MW
GFI
DW
GFI
FC
D
A

ONLY APPLICABLE FOR

CAL RANCH STYLE
A07
A03A06 A05
B14
B17B16
SEE DETAIL:
/54 A-901
B18
F02
B14
A05A06 A03
A07
B04
B12
B06
B02
B17B16

DUPLEX OUTLET

ARC-FAULT CIRCUIT

INTERRUPTER

DUPLEX OUTLET
240 VOLTS

DUPLEX OUTLET

GROUND FAULT

INTERRUPTER

DUPLEX OUTLET

WATERPROOF

GROUND FAULT

INTERRUPTER

DUPLEX OUTLET

AFCI-HALF HOT

ELECTRICAL

JUNCTION BOX
SMOKE

DETECTOR/ALARM

COMBINATION

SMOKE/CARBON

MONOXIDE
FAN COIL UNIT +80"

TO BOTTOM OF UNIT

PROVIDE DEDICATED
OUTLET

ELECTRICAL
SWITCH

ELECTRICAL

SWITCH-THREE

WAY-DIMMER

ELECTRICAL

SWITCH-

VACANCY
SENSOR

ELECTRICAL

SWITCH-DIMMER

COLD WATER

STUB OUT

HOT WATER STUB
OUT

WATER HOSE BIBB

WITH SHUT OF
VALVE

CEILING FAN OPTIONAL
(PRE WIRE FOR CEILING

FAN ONLY)

INDOOR AIR

QUALITY FAN

PENDANT LIGHT

HIGH-EFFICACY

RECESSED

HIGH- EFFICACY

DOWNLIGHT

RECESSED HIGH- EFFICACY

DOWNLIGHT-VAPOR PROOF

WALL MOUNTED

HIGH-EFFICACY
LIGHT

EXTERIOR WALL

MOUNTED HIGH-

EFFICACY LIGHT W/

PHOTO SENSOR

DUPLEX OUTLET

MICROWAVE

GROUND FAULT

INTERRUPTER

DUPLEX OUTLET

DISH WASHER

GROUND FAULT

INTERRUPTER

ELECTRICAL

SWITCH-FAN

ASTRONOMICAL

TIME OR MOTION

SENSOR SWITCH
(AT LEAST 1 REQ.)

ELECTRICAL
WIRING

EXHAUST FAN

DUPLEX OUTLET

RANGE HOOD
NOTE: IONIZATION
SMOKE DETECTOR 10'

MINIMUM FROM STOVE,
ALL OTHERS 20'MIN

CLEARANCE
3D
NOTE: IONIZATION SMOKE DETECTOR 10' MINIMUM FROM STOVE, ALL OTHERS 20'MIN CLEARANCE
22"X30" MIN. ATTIC ACCESS PANEL (WHERE REQ.)

VENTILATION SUMMARIES
NOTE: KITCHEN RANGE HOOD (CEC 2025) PER TABLE 150.0-G ARIFLOW RATES (CFM) AND ASTM E3087 <750 SF = 65% CE OR 160 CFM, 750 SF-1000 SF = 55% CE OR 130 CFM EFFECTIVE ANNUAL AVERAGE INFILTRATION RATE PER SECTION 150.0(O)(C)(ii) a. 1. (Equation 150.0-C) Q50 = Vdu (x) 2 ACH50 / 60minutes a. 2. (Equation 150.0-D) Q50 = Vdu (x) Verified ACH50 / 60minutes b. (Equation 150.0-E) Qtot = 0.052 (x) Q50 x wsf x [H/Hr]^z [ASHRAE 62.2:4.1.2.1] REQUIRED MECHANICAL VENTILATION RATE PER 150.0(O)(C)(iii) [ASHRAE 62.2:4.1.2] (Equation 150.0-F) Qfan = Qtot (-) ϕ (Qinf (x) Aext)
1) LOCAL EXHAUST VENTILATION

BATHROOM
BATHROOM FAN FLOW (cfm) .............................

DUCT TYPE ...........................................................

DUCT SIZE (in) ......................................................

THIS EXHAUST FAN IS REQUIRED TO BE RATED FOR SOUND AT A MAX. OF 3 SONES.

MAX. ALLOWABLE DUCT LENGTH (ft) ...............

KITCHEN
KITCHEN FAN FLOW (cfm) ..................................

DUCT TYPE ...........................................................

DUCT SIZE (in) ......................................................

MAX. ALLOWABLE DUCT LENGTH (ft) ................
2) WHOLE BUILDING VENTILATION
THIS EXHAUST FAN IS REQUIRED TO BE RATED FOR SOUND AT A MAX. OF 1 SONE.

THIS EXHAUST FAN IS REQUIRED TO OPERATE CONTINUOUSLY TO ENSURE CONTINUOUSLY TO ENSURE INDOOR AIR QUALITY.

PER ASHRAE STANDARD 62.2, CEC EQUATION 150.0-B
THIS EXHAUST FAN IS REQUIRED TO BE RATED FOR SOUND AT A MAX. OF 3 SONES.

BUILDING FAN FLOW (cfm) .............................

DUCT TYPE ...........................................................

DUCT SIZE (in) ......................................................

MAX. ALLOWABLE DUCT LENGTH (ft) ...............

OPTION A OPTION B

OPTION A OPTION B
50 CFM
4"
70'
160 CFM
7"
35'
50 CFM
4"
70'

FLEX DUCT

FLEX DUCT
50 CFM
4"
105'
50 CFM

SMOOTH DUCT

SMOOTH DUCT
9"
85'
50 CFM

SMOOTH DUCT
4"
105'
SCALE: 1/4" = 1'-0"A1-111
ELECTRICAL PLAN - PLAN 11
SCALE: 1/4" = 1'-0"A1-111
MECHANICAL& PLUMBING PLAN - PLAN 12
LEGEND
REFER TO T-24 FOR IAQ VENTILATION

WHOLE DWELLING UNIT MECHANICAL VENTILATION
PER SECTION 150.0(O)(C)(i) [ASHRAE 62.2:4.1.2]
1 BED - MINIMUM CUBIC FEET PER MINUTE (CFM) (Equation 150.0-B) Qtot = 0.03Afloor + 7.5(Nbr + 1) .03(350 SF) + 7.5 (0+1) = 18 CFM < 50 CFM A03 30" WIDE FREE STANDING ELECTRIC RANGE OVEN. VENT TO EXTERIOR, STAINLESS STEEL.

A05 REFRIGERATOR LOCATION. PROVIDE 36" SPACE WITH ROUGH PLUMBING FOR ICE MAKER (RECESS IN WALL) OR PER OWNER'S SPECIFICATIONS.

A06 24" WIDE FRONT CONTROL UNDERCOUNTER DISHWASHER.

A07 STACKED WASHER/DRYER MACHINE LOCATION. PROVIDE WASTE AND WATER IN RECESSED WALL BOX. PROVIDE DRYER VENT. VENT TO OUTSIDE AIR.

B02 30" SINGLE COMPARTMENT UNDER-MOUNT KITCHEN SINK W/ GARBAGE DISPOSAL. REFER TO WATER EFFICIENCY REQUIREMENTS ON CALGREEN CODE NOTES SHEET.

B04 LAVATORY SINK. REFER TO WATER EFFICIENCY REQUIREMENTS ON CALGREEN CODE NOTES SHEETS.

B06 32" x 60" x 72" TUB AND SHOWER COMBINATION. MODEL BY BUILDER.

PROVIDE SHOWER ROD.

B14 40 GALLON TANK WATER HEATER. REFER TO TITLE 24 FOR ADDITIONAL INFORMATION.

B16 ELECTRIC PANEL LOCATION. PROVIDE PROTECTION PER CPC 507.25 & CMC 305.1.1, SEE GENERAL MEP NOTES 7 & 8 ON SHEET A-111 FOR MORE INFO.

B18 FAN COIL @ 80" A.F.F. TO BOTTOM OF UNIT, PROVIDE DEDICATED WALL

OUTLET, INSTALL PER MANUFACTERER'S SPECIFICATIONS, REFER TO PLANS FOR LOCATION OF OUTDOOR CONDENSING UNIT. REFER TO TITLE 24 FOR ADDITIONAL INFORMATION.

F02 22" X 30" MINIMUM ATTIC ACCESS. PROVIDED SWITCH AND OUTLET AT ATTIC.

KEYNOTES
DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:09:14 PM

MECHANICAL, & ELECTRICAL
PLANS

PRE-APPROVED ADU

CITY OF ANTIOCH
A1-111
08/19/26

PUBLIC SET

ELECTRICAL NOTES

1. 2.

3. 4.

5. 6.

7. 8.

9. 10.

11. 12.

13. 14.

15. 16.

17. 18.

19. 20.

21. CONFORM WITH CURRENT CEC, NFPA, MFR'S, AND LOCAL REQUIREMENTS.

ELECTRICAL SYSTEM GROUND TO BE PROVIDED PER NEC ARTICLE 250-81.

ALL MATERIALS TO BE U.L. LABELED.

METER: "SQUARE D", 120 VOLT/ 240 VOLT, 1 AND 3 WIRE GROUND OR EQUAL.

ELECTRICAL SUB PANEL: FLUSH MOUNT, 30" CLEARANCE. SEE TITLE SHEET FOR PANEL OPTIONS.

CONDUCTORS: TW, THW, COPPER, MINIMUM 14 AT LIGHTING, 12 AT OTHER CIRCUITS.

ALL LUMINARIES SHALL COMPLY WITH 2025 CEC SECTION 150.0 (K) AND TABLE 150.0-A AS REFERENCED IN ENERGY NOTES, LUMINAIRE
REQUIREMENTS SHEET G-101.

ALL ELECTRICAL OUTLETS INSTALLED IN BATHROOMS, GARAGES,

BASEMENTS, CRAWL SPACES, OUTDOORS, KITCHEN COUNTERS, AND AT

WET BAR SINKS SHALL HAVE GROUND-FAULT CIRCUIT-INTERRUPTER PROTECTION IN COMPLIANCE WITH NEC Art. 210-8, CONSISTING OF 125 VOLT,
SINGLE-PHASE, 15- AND 20- AMPERE RECEPTACLES.

ALL BATHROOM RECEPTACLE OUTLETS SHALL BE SUPPLIED BY A MINIMUM OF ONE 120-VOLT, 20-AMPERE BRANCH CIRCUIT. SUCH CIRCUITS SHALL HAVE NO OTHER OUTLETS. THIS DEDICATED CIRCUIT MAY SERVE MORE THAN ONE BATHROOM. (2025 CEC 210.11(C))
THERMOSTAT SHALL BE A PROGRAMMABLE TYPE, HONEYWELL TH8320 OR EQUAL.

CEILING-SUSPENDED (PADDLE) FANS SHALL BE SUPPORTED

INDEPENDENTLY OF AN OUTLET BOX OR BY LISTED OUTLET BOX OR OUTLET

BOX SYSTEMS IDENTIFIED FOR THE USE AND INSTALLED IN ACCORDANCE WITH 2025 CEC 314.27(C) (2025 CEC 422.18).

ALL LUMINARIES, LAMPHOLDERS, AND RETROFIT KITS SHALL BE LISTED (2025 CEC 410.6).

ALL 120-VOLT, SINGLE PHASE 15- AND 20- AMPERE BRANCH CIRCUITS

SUPPLYING OUTLETS INSTALLED IN DWELLING UNIT KITCHENS, FAMILY

ROOMS, LIVING ROOMS, DINING ROOMS, PARLORS, LIBRARIES, DENS,

BEDROOMS, SUNROOMS, RECREATION ROOMS, CLOSETS, HALLWAYS OR

SIMILAR ROOMS OR AREAS SHALL BE PROTECTED BY A LISTED ARC-FAULT

CIRCUIT INTERRUPTER, COMBINATION-TYPE, INSTALLED TO PROVIDE PROTECTION OF THE BRANCH CIRCUIT. (2025 CEC 210-12(A)).

ALL NON-LOCKING TYPE 125-VOLT, 15 AND 20 AMPERE RECEPTACLES IN A DWELLING UNIT SHALL BE LISTED TAMPER-RESISTANT RECEPTACLES.

EXCEPTIONS: (1) RECEPTACLES MORE THAN 5’6” ABOVE THE FLOOR, (2) RECEPTACLES PART OF A LUMINAIRE OR APPLIANCE, (3) A SINGLE

RECEPTACLE OR A DUPLEX RECEPTACLE FOR TWO APPLIANCES THAT ARE

NOT EASILY MOVED AND LOCATED WITHIN DEDICATED SPACE AND ARE CHORD-AND-PLUG CONNECTED AS PER CEC 400.10, AND (4) NON-

GROUNDING RECEPTACLES USED FOR REPLACEMENTS AS PERMITTED IN 2025 CEC 406.4(D)(2)(A).

HIGH EFFICACY LUMINAIRES OTHER THAN OUTDOOR HID LIGHTING CONTAIN ONLY HIGH EFFICACY LAMPS AS OUTLINED IN TABLE 150-C OF THE

RESIDENTIAL ENERGY CODE AND NOT CONTAIN A MEDIUM SCREW BASE SOCKET.

BALLAST FOR LAMPS 13 WATTS OR GREATER SHALL BE ELECTRONIC AND HAVE AN OUTPUT FREQUENCY NO LESS THAT 20 kHz.

SMOKE DETECTORS SHALL RECEIVE THEIR PRIMARY POWER FROM THE BUILDING WIRING AND PROVIDED WITH A BATTERY BACK-UP. ALL SMOKE DETECTORS SHALL BE INTERCONNECTED. ALL SMOKE DETECTORS SHALL MAINTAIN A MINIMUM 3 FOOT CLEARANCE TO HVAC SUPPLY OR RETURN AIR REGISTERS.

CARBON MONOXIDE ALARMS SHALL RECEIVE THEIR PRIMARY POWER FROM THE BUILDING WIRING AND PROVIDED WITH A BATTERY BACK-UP. ALL CARBON MONOXIDE ALARMS SHALL BE INTERCONNECTED.

EXHAUST FANS WILL BE CONTROLLED BY A HUMIDISTAT PER THE GREEN BUILDING STANDARDS CODE SECTION 4.506. EXHAUST FANS MUST BE SWITCHED SEPARATELY FROM LIGHTS (2025 CEnC 150.0(k)2G).

IN ADDITION TO THE NUMBER OF BRANCH CIRCUITS REQUIRED BY OTHER PARTS OF THE CODE, TWO OR MORE 20-AMPERE SMALL-APPLIANCE

BRANCH CIRCUITS SHALL BE PROVIDED FOR ALL RECEPTACLE OUTLETS IN

THE KITCHEN, PANTRY, BREAKFAST ROOM, DINING ROOM, OR SIMILAR AREA PER 2025 CEC, ARTICLE 210.11 (C)(1). THE CIRCUITS SHALL HAVE NO OTHER OUTLETS PER 2025 CEC, ARTICLE 210.52(B).

IN ADDITION TO THE NUMBER OF BRANCH CIRCUITS REQUIRED BY OTHER PARTS OF THE CODE, AT LEAST ONE ADDITIONAL 20-AMPERE BRANCH

CIRCUIT SHALL BE PROVIDED TO SUPPLY THE LAUNDRY RECEPTACLE OUTLET(S) REQUIRED BY 2025 CEC, ARTICLE 210.52 (F). THIS CIRCUIT SHALL HAVE NO OTHER OUTLETS PER 2025 CEC, ARTICLE 201.11(C)(2).

1. 2.

3. 4.

5. 6.

7. 8.

9. 10.

REFER TO ELECTRICAL NOTES ON SHEET G-101.

REFER TO MECHANICAL NOTES ON SHEET G-101.

REFER TO PLUMBING NOTES ON SHEET G-101.

REFER TO TITLE 24 COMPLIANCE NOTES ON SHEET G-102.

EXTERNALLY MOUNTED HEATING/COOLING UNITS SHALL BE SCREENED IF THEY ARE VISIBLE FROM A PUBLIC STREET.

ENVIRONMENTAL AIR DUCT EXHAUST SHALL TERMINATE NOT LESS THAN 3 FT FROM WALL OPENINGS. CMC 502.2.1.

APPLIANCES NOT LISTED FOR OUTDOOR INSTALLATION BUT INSTALLED

OUTDOORS SHALL BE PROVIDED WITH PROTECTION TO THE DEGREE THAT THE ENVIRONMENT REQUIRES. APPLIANCES LISTED FOR OUTDOOR

INSTALLATION SHALL BE PERMITTED TO BE INSTALLED WITHOUT

PROTECTION IN ACCORDANCE WITH THE PROVISIONS OF ITS LISTING AND THE MANUFACTURER'S INSTALLATION INSTRUCTIONS PER CPC 507.24 PROTECTION OF OUTDOOR APPLIANCES.

APPLIANCES INSTALLED IN GARAGES, WAREHOUSES, OR OTHER AREAS SUBJECT TO MECHANICAL DAMAGE SHALL BE AT LEAST 18" ABOVE THE

FLOOR AND GUARDED AGAINST SUCH DAMAGE BY BEING INSTALLED BEHIND

PROTECTIVE BARRIERS OR BY BEING ELEVATED OR LOCATED OUT OF THE NORMAL PATH OF VEHICLES PER CMC 305.1.1 PHYSICAL DAMAGE.

INSTALLED AIR CONDITIONER AND HEAT PUMP SYSTEMS SHALL HAVE A CLEARANCE OF AT LEAST FIVE (5) FEET FROM THE OUTLET OF ANY DRYER VENT. CEnC2025 150.0 (H) 3.

INSTALLED AIR CONDITIONER AND HEAT PUMP SYSTEMS SHALL BE EQUIPPED

WITH LIQUID LINE DRIERS IF REQUIRED, AS SPECIFIC BY MANUFACTURER'S INSTRUCTIONS. CEnC2025 150.0 (H) 3.

11. ASSEMBLIES AT EXTERIOR WINDOW AND DOOR HEADERS IN 2X6 EXTERIOR WALLS SHALL BE R-5 MINIMUM PER 2025 SINGLE-FAMILY RESIDENTIAL

MANDATORY REQUIREMENTS

GENERAL MEP NOTES

PLUMBING NOTES
•
•

1. WATER HEATER
REFER TO T-24 ENERGY REPORT FOR REQUIRED PRODUCT. SEE SHEET A-930 FOR PRODUCT REFERENCE SHEETS.

WATER HEATER SHALL FOLLOW FIRST HOUR RATINGS REQUIRED IN TABLE PER 2025 CPC TABLE 501.1(2).

A. ALL DOMESTIC HOT WATER PIPING SHALL BE INSULATED. (2025 CPC 609.12.1)
PIPES UP TO 2 INCHES IN DIAMETER: INSULATION WALL THICKNESS NOT LESS THAN DIAMETER OF PIPE. (2025 CPC 609.12.2)
PIPES GREATER THAN 2 INCHES IN DIAMETER: INSULATION WALL THICKNESS NOT LESS THAN 2 INCHES. (2025 CPC 609.12.2)
EXCEPTIONS:

1. PIPING THAT PENETRATES FRAMING MEMBERS SHALL NOT BE

REQUIRED TO HAVE PIPE INSULATION FOR THE DISTANCE OF THE FRAMING PENETRATION. (2025 CPC 609.12.2)

2. HOT WATER PIPING BETWEEN THE FIXTURE CONTROL VALVE OR

SUPPLY STOP AND THE FIXTURE OR APPLIANCE SHALL NOT BE
REQUIRED TO BE INSULATED. (2025 CPC 609.12.2)
B. PROVIDE A TEMPERATURE AND PRESSURE RELIEF VALVE WITH A FULL

SIZE DRAIN OF GALVANIZED STEEL OR HARD DRAWN COPPER TO THE OUTSIDE OF THE BUILDING WITH THE END OF THE PIPE PROTRUDING 6" MINIMUM @ 2' MAX. ABOVE GRADE POINTING DOWNWARD TO THE TERMINATION - UNTHREADED.

C. COMBUSTION AIR PER MANUFACTURE REQUIREMENTS.

D. CLEARANCES PER MANUFACTURE REQUIREMENTS.

FOR USE IN CITY OF ANTIOCH ONLY
B7
SD
IAQ
SD/MA
A
A
1 1
2 2
B
B
BED 1
CL.

LAUNDRY

BATH WH

KITCHEN/DINING
LIVING
OPT. COVERED
PORCH
8' - 0"
8' - 0 3/4"
F02
A
A
1 1
2 2
B
B
5" / 1'-0"5" / 1'-0"
5" / 1'-0" 5" / 1'-0"
TYP.
1' - 0" EAVE
TYP.
1' - 0" RAKE
137 SF
22 SF55 SF
23 SF 23 SF
RIDGE
VALLEY
VALLEY
RIDGE
K09
L01
M01
H10H09
M02
31 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 32 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 23 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 23 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 2 B
1' - 6"
5" / 1'-0"5" / 1'-0" 5" / 1'-0"
22 SF
VALLEY
VALLEY
2 B

LAUNDRY
WH
LIVING
8' - 0"

CEILING HEIGHT (SEE PLAN FOR ACTUAL HEIGHTS)
XX'-X"

ROOF PLAN & RCP LEGEND
X" / 12" ROOF SLOPE (REFER TO PLANS FOR ACTUAL SLOPE)

ROOF VENT, SEE ROOF VENTING CALCULATIONS

OUTLINE OF WALL BELOW
GUTTER, CONNECT TO DOWNSPOUT; SEE DETAIL:

APPROXIMATE LOCATION OF DOWNSPOUT/LEADER TO ROOF
OR SPLASHBLOCK BELOW; SEE DETAILS:

AVAILABLE SOLAR ZONE LOCATIONS; PV SYSTEM UNDER
SEPERATE PERMIT. SEE TITLE SHEET AND TITLE 24 REPORT
FOR MORE INFORMATION. SEE "SETBACK AT RIDGE TABLE"
XX SF
AREA OF ATTIC WITH 30" HEIGHT OR GREATER. 22" X 30" CLEAR OPENING ACCESS REQUIRED IF TOTAL AREA GREATER THAN 30
SQ. FT. PER CRC R807.1
22"X30" MIN. ATTIC ACCESS PANEL (WHERE REQ.)
DOWNSPOUT. SEE DETAIL:DS /23 A-901

MATERIALS LEGEND
INTERIOR CEILING FINISH, TYP. 5/8" GYP.

INSTALL PER MFR RECOMMENDATIONS

OWNER/APPLICANT TO PROVIDE MANUFACTURER, COLOR/FINISH SPECIFICATIONS ON THE MATERIALS LEGEND ON THE ELEVATION SHEET.

EXTERIOR SOFFITS, RAKES, & EAVES

ASPHALT SHINGLE ROOF
ROOF REFLECTANCE (0.1) MIN.

ROOF EMITTANCE (0.85) MIN.

1. 2.

3. 4.

NOTES:

SOFFIT MATERIALS TO MEET REQ. OF CWUIC 504 & CRC 704.

INSTALL ALL MATERIALS, FASTENERS, & COMPONENTS PER MANUFACTURER'S

SPECIFICATIONS & RECOMMENDATIONS

INSTALL ADDITIONAL BLOCKING AS NEEDED TO MEET ATTACHMENT REQUIREMENTS PER CRC TABLE R702.3.5

A PROJECT SITE WITHIN THE WILDLAND-URBAN INTERFACE FIRE AREA SHALL COMPLY WITH THE CWUIC 504.

X: SETBACK AT RIDGE TABLE

PV ARRAYS PERCENT OF THE PLAN

VIEW TOTAL ROOF AREA
(X)

HORIZONTAL RIDGE SETBACK
≤33%
>33%
>66% + 12D SPRINKLER
≤66% + 13D SPRINKLER
18" BOTH SIDES OF RIDGE
36" BOTH SIDES OF RIDGE
36" BOTH SIDES OF RIDGE
18" BOTH SIDES OF RIDGE

ROOF VENTING CALCULATIONS

1. 2.

3. WUI REQUIRED? (SEE G-001)

A) NO, MAY USE OPTION A OR C

B) YES,

MUST USE FIRE & ICE OPTION B OR OTHER WUI COMPLIANT VENTS UPPER & LOWER VENTS FOR COMPOSITE SHINGLE ROOFING:

A) O'HAGIN TAPERED LOW PROFILE COMPOSITION SHINGLE.

72.0 SQ.IN OF AIR MOVEMENT PER VENT = 72. SQ.IN. / 144 = 0.5 SF (SEE 22/A-921 FOR PRODUCT REFERENCE)
"UPPER VENTS PROVIDED"
= (TOTAL ATTIC AREA/300) * (0.5) / (0.5 SF)
"LOWER VENTS PROVIDED" = (TOTAL ATTIC AREA/300) * (0.5) / (0.5 SF) B) O'HAGIN FIRE & ICE TAPERED LOW PROFILE COMPOSITION SHINGLE.

64.8 SQ.IN OF AIR MOVEMENT PER VENT = 65.8 SQ.IN. / 144 = 0.45 SF
(SEE 22/A-921 FOR PRODUCT REFERENCE)
"UPPER VENTS PROVIDED" = (TOTAL ATTIC AREA/300) * (0.5) / (0.45 SF) "LOWER VENTS PROVIDED" = (TOTAL ATTIC AREA/300) * (0.5) / (0.45 SF) C)

ALTERNATIVE PRODUCT, MUST BE EQUAL TO PRODUCT ABOVE, AND PROVIDE GREATER THAN OR EQUAL AIR MOVEMENT.

ROOF VENTING SHALL COMPLY WITH CRC R806 & CBC 701A.

ENCLOSED ATTICS AND ENCLOSED RAFTER SPACES FORMED WHERE CEILING S

ARE APPLIED DIRECTLY TO THE UNDERSIDE OF ROOF RAFTERS SHALL HAVE

CROSS VENTILATION FOR EACH SEPARATE SPACE BY VENTILATING OPENINGS PROTECTED AGAINST THE ENTRANCE OF RAIN OR SNOW. VENTILATION OPENINGS SHALL HAVE A LEAST DIMENSION OF 1/16 INCH MINIMUM AND 1/4 INCH MAXIMUM. OPENINGS IN ROOF FRAMING MEMBERS SHALL CONFORM TO THE REQUIREMENTS OF SECTION R802.7. REQUIRED VENTILATION OPENINGS SHALL

OPEN DIRECTLY TO THE OUTSIDE AIR AND SHALL BE PROTECTED TO PREVENT THE ENTRY OF BIRDS, RODENTS, SNAKES AND OTHER SIMILAR CREATURES.

THE MINIMUM NET FREE VENTILATING AREA SHALL COMPLY WITH CRC R806.2. *OWNER/APPLICANT REQ. TO SELECT ONE THE FOLLOWING

ATTIC AREA

REQUIRED ATTIC

VENTING (NFA)

UPPER VENTING

REQUIRED (NFA)

LOWER VENTING

REQUIRED (NFA)
ATTIC 1 308 SF 1.03 SF 0.51 SF 0.51 SF

VENT TYPE COUNT
VENT
LENGTH

NET FREE

AREA PER
VENT

PROVIDED

NET FREE
AREA
LOWER
O'HAGIN SHINGLE ROOF VENT (LOWER) 2 2' - 8" 0.50 SF 1.00 SF UPPER
O'HAGIN SHINGLE ROOF VENT (UPPER) 2 2' - 8" 0.50 SF 1.00 SF

2.00 SF
SCALE: 1/4" = 1'-0"A1-121

REFLECTED CEILING PLAN -
CALIFORNIA RANCH2
SCALE: 1/4" = 1'-0"A1-121
ROOF PLAN - CAL RANCH1

KEYNOTES
F02 22" X 30" MINIMUM ATTIC ACCESS. PROVIDED SWITCH AND OUTLET AT ATTIC.

THERE IS NO HVAC EQUIPMENT (SUCH AS FURNACE, HEAT PUMP, OR FAU) IN THE ATTIC. PERMANENTLY ATTACH R-38 OR GREATER INSULATION TO ATTIC ACCESS DOOR USING ADHESIVE OR MECHANICAL FASTENERS CEnC 150.0 (a)1. PROVIDE GASKETED ATTIC ACCESS TO PREVENT AIR LEAKAGE CEnC 150.0 (a)1."
H09 ATTIC VENT (HIGH); UPPER VENTILATORS SHALL BE LOCATED NOT MORE THAN 3 FEET BELOW THE RIDGE OR HIGHEST POINT OF THE SPACE, MEASURED VERTICALLY. PAINT FINISH TO MATCH ROOF COLOR, SEE VENTING CALCS.

H10 ATTIC VENT (LOW); LOWER VENTILATORS SHALL BE LOCATED IN THE BOTTOM ONE-THIRD OF THE ATTIC SPACE PER R806.2 EXCEPTION 2.

PROVIDE DAMPER TO PROVIDE 1" CLR. AIRSPACE WHERE REQ. PAINT FINISH TO MATCH ROOF COLOR, SEE VENTING CALCS.

K09 COMPOSITE ROOF SHINGLES, ROOF REFLECTANCE (0.1) MIN. ROOF EMITTANCE (0.85) MIN. SEE MATERIALS LEGEND FOR MORE INFORMATION.

L01 FASCIA; SEE DETAILS FOR MORE INFORMATION.

M01 GUTTER. CONNECT TO DOWNSPOUT. PROVIDE MEANS TO PREVENT ACCUMULATION OF LEAVES AND DEBRIS IN GUTTER PER CRC R337.5.4. SEE DETAIL 12/A-903.

M02 DOWNSPOUT TO SPLASH BLOCK BELOW. SEE DETAIL 23/A-901.

SCALE: 1/4" = 1'-0"A1-121
ROOF PLAN - NO COVERED PORCH OPTION3
SCALE: 1/4" = 1'-0"A1-121

REFLECTED CEILING PLAN -
NO COVERED PORCH OPTION4
VENTING NEEDED (BASED ON OPTION A):

VENTING PROVIDED (BASED ON OPTION A):

DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:09:16 PM

ROOF PLAN & REFLECTED

CEILING PLAN - CAL RANCH

PRE-APPROVED ADU

CITY OF ANTIOCH
A1-121
08/19/26

PUBLIC SET

1. 2.

3. 4.

5. 6.

7. 8.

9. 10.

11. 12.

13. REFER TO GENERAL NOTES SHEET G-101 & G-102 FOR ADDITIONAL

REQUIREMENTS

REFER TO STRUCTURAL PLANS FOR ROOF FRAMING INFORMATION
INCLUDING MEMBER SIZES AND CONNECTION HARDWARE.

PROVIDE A MINIMUM OF 1 INCH OF AIRSPACE BETWEEN THE INSULATION AND ROOF SHEATHING.

WHERE THE ROOF PROFILE ALLOWS A SPACE BETWEEN THE ROOF

COVERING AND DECKING, THE SPACES SHALL BE CONSTRUCTED TO

PREVENT THE INTRUSION OF FLAMES AND EMBERS, BE FIRESTOPPED WITH APPROVED MATERIALS OR HAVE ONE LAYER OF MINIMUM 72 POUND

MINERAL-SURFACED NONPERFORATED CAP SHEET OVER THE
COMBUSTIBLE DECKING.

ALL ROOFING MATERIALS TO BE INSTALLED PER MANUFACTURER'S SPECIFICATIONS.

OVERHANG DIMENSIONS ARE FROM FACE OF SHEATHING TO ROOF EDGE.

ROOF COVERINGS SHALL BE APPLIED IN ACCORDANCE WITH (CRC R905), AND MANUFACTURER'S INSTALLATION INSTRUCTIONS. ROOF COVERINGS

SHALL BE INSTALLED TO RESIST THE COMPONENT AND CLADDING LOADS SPECIFIED IN R301.2.1(1), AND ADJUSTED FOR HEIGHT AND EXPOSURE IN ACCORDANCE WITH TABLE R301.2.1(2).

ROOF UNDERLAYMENTS SHALL BE IN ACCORDANCE WITH SECTION R905.1.1, TABLE R905.1.1(2), AND TABLE R905.1.1(1).

ROOF VENTS SHALL BE APPLIED PER MANUFACTURER'S SPECIFICATIONS.

FURNISHED DIMENSIONS FOR VENTS ARE GUIDES ONLY. INSTALL PER

MANUFACTURERS SPECIFICATIONS AND ADJUST TO ACCOMMODATE TRUSS LOCATIONS, PLUMBING VENTS, AND SOLAR COLLECTORS.

ENCLOSED ATTICS AND ENCLOSED RAFTER SPACES FORMED WHERE

CEILINGS ARE APPLIED DIRECTLY TO THE UNDERSIDE OF ROOF RAFTERS

SHALL HAVE CROSS VENTILATION FOR EACH SEPARATE SPACE BY

VENTILATING OPENINGS PROTECTED AGAINST THE ENTRANCE OF RAIN OR SNOW. VENTILATION OPENINGS SHALL HAVE A LEAST DIMENSION OF 1/16 INCH (1.6 MM) MINIMUM AND 1/4 INCH (6.4 MM) MAXIMUM. VENTILATION OPENINGS HAVING A LEAST DIMENSION LARGER THAN 1/4 INCH (6.4 MM)

SHALL BE PROVIDED WITH CORROSION-RESISTANT WIRE CLOTH

SCREENING, HARDWARE CLOTH, PERFORATED VINYL OR SIMILAR MATERIAL WITH OPENINGS HAVING A LEAST DIMENSION OF 1/16 INCH (1.6 MM) MINIMUM AND 1/4 INCH (6.4 MM) MAXIMUM. OPENINGS IN ROOF FRAMING MEMBERS SHALL CONFORM TO THE REQUIREMENTS OF SECTION R802.7. REQUIRED

VENTILATION OPENINGS SHALL OPEN DIRECTLY TO THE OUTSIDE AIR AND

SHALL BE PROTECTED TO PREVENT THE ENTRY OF BIRDS, RODENTS, SNAKES AND OTHER SIMILAR CREATURES (CRC R806).

THE MINIMUM NET FREE VENTILATING AREA SHALL COMPLY WITH CRC R806.2.

IN THE INSTANCE OF UPPER VENTS, VENTS SHALL BE LOCATED NO MORE THAN 3 FT BELOW THE RIDGE OR HIGHEST POINT OF THE SPACE, MEASURED VERTICALLY. CRC R806.2.

ROOF PLAN GENERAL NOTES

1. 2.

3. 4.

5. HEIGHT OF CEILINGS SHALL BE MEASURED FROM TOP OF SLAB OR SUBFLOOR TO FINISH FACE OF GWB, U.N.O.

REFER TO DETAILS FOR FLOOR/CEILING ASSEMBLIES.

REFER TO ELECTRICAL PLANS FOR LIGHT FIXTURE AND EXHAUST LOCATIONS.

DIMENSIONS ARE TO THE FACE OF SHEATHING UNLESS OTHERWISE NOTED.

SOFFITS ARE TO BE HELD TIGHT TO UNDERSIDE OF MECHANICAL EQUIPMENT.

RCP GENERAL NOTES

FOR USE IN CITY OF ANTIOCH ONLY
B8
A
A
1 1
2 2
B
B
BED 1
CL.

LAUNDRY
BATH
WH

KITCHEN/DINING
LIVING
OPT. COVERED
PORCH
8' - 0"
3" / 1'-0" 3" / 1'-0"
2 B
2' - 0"
3" / 1'-0" 3" / 1'-0"
3" / 1'-0"
22 SF55 SF
VALLEY
VALLEY
RIDGE
A
A
1 1
2 2
B
B
3" / 1'-0"3" / 1'-0"
3" / 1'-0" 3" / 1'-0"
TYP.
1' - 6" EAVE
TYP.
1' - 0" RAKE
137 SF
22 SF55 SF
23 SF 23 SF
RIDGE
VALLEY
VALLEY
RIDGE
K09
L01
M01
31 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 32 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 23 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 23 A-911
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ M01H10
H09
M02
2 B
LIVING

LAUNDRY
WH
8' - 0"

CEILING HEIGHT (SEE PLAN FOR ACTUAL HEIGHTS)
XX'-X"

ROOF PLAN & RCP LEGEND
X" / 12" ROOF SLOPE (REFER TO PLANS FOR ACTUAL SLOPE)

ROOF VENT, SEE ROOF VENTING CALCULATIONS

OUTLINE OF WALL BELOW
GUTTER, CONNECT TO DOWNSPOUT; SEE DETAIL:

APPROXIMATE LOCATION OF DOWNSPOUT/LEADER TO ROOF
OR SPLASHBLOCK BELOW; SEE DETAILS:

PV ARRAYS PERCENT OF THE PLAN

VIEW TOTAL ROOF AREA
(X)

HORIZONTAL RIDGE SETBACK
≤33%
>33%
>66% + 12D SPRINKLER
≤66% + 13D SPRINKLER
18" BOTH SIDES OF RIDGE
36" BOTH SIDES OF RIDGE
36" BOTH SIDES OF RIDGE
18" BOTH SIDES OF RIDGE

ROOF VENTING CALCULATIONS

1. 2.

3. WUI REQUIRED? (SEE G-001)

A) NO, YOU MAY USE OPTION A OR C

B) YES, MUST USE FIRE & ICE OPTION B OR OTHER WUI COMPLIANT VENTS UPPER & LOWER VENTS FOR S-TILE ROOFING:

A) O'HAGIN HIGH PROFILE "S" CONCRETE TILE ROOF VENT.

97.5 SQ.IN OF AIR MOVEMENT PER VENT = 97.5 SQ.IN. / 144 = .68 SF (SEE 34/A-921 FOR PRODUCT REFERENCE)
"UPPER VENTS PROVIDED" = (TOTAL ATTIC AREA/300) * (0.68) / (0.5 SF) "LOWER VENTS PROVIDED" = (TOTAL ATTIC AREA/300) * (0.68) / (0.5 SF) B) O'HAGIN FIRE & ICE HIGH PROFILE "S" CONCRETE TILE ROOF VENT.

88.7 SQ.IN OF AIR MOVEMENT PER VENT = 88.7 SQ.IN. / 144 = .61 SF (SEE 34/A-921 FOR PRODUCT REFERENCE)
"UPPER VENTS PROVIDED" = (TOTAL ATTIC AREA/300) * (0.61) / (0.5 SF) "LOWER VENTS PROVIDED" = (TOTAL ATTIC AREA/300) * (0.61) / (0.5 SF)

C) ALTERNATIVE PRODUCT, MUST PROVIDE GREATER THAN OR EQUAL AIR MOVEMENT.

ROOF VENTING SHALL COMPLY WITH CRC R806 & CBC 701A.

ENCLOSED ATTICS AND ENCLOSED RAFTER SPACES FORMED WHERE CEILINGS

ARE APPLIED DIRECTLY TO THE UNDERSIDE OF ROOF RAFTERS SHALL HAVE

OPEN DIRECTLY TO THE OUTSIDE AIR AND SHALL BE PROTECTED TO PREVENT THE ENTRY OF BIRDS, RODENTS, SNAKES AND OTHER SIMILAR CREATURES.

THE MINIMUM NET FREE VENTILATING AREA SHALL COMPLY WITH CRC R806.2. *OWNER/APPLICANT REQ. TO SELECT ONE THE FOLLOWING

MATERIALS LEGEND
INTERIOR CEILING FINISH, TYP. 5/8" GYP.

INSTALL PER MFR RECOMMENDATIONS

OWNER/APPLICANT TO PROVIDE MANUFACTURER, COLOR/FINISH SPECIFICATIONS ON THE MATERIALS LEGEND ON THE ELEVATION SHEET.

EXTERIOR SOFFITS, RAKES, & EAVES

ASPHALT SHINGLE ROOF
ROOF REFLECTANCE (0.1) MIN.

ROOF EMITTANCE (0.85) MIN.

1. 2.

3. 4.

NOTES:

SOFFIT MATERIALS TO MEET REQ. OF CWUIC 504 & CRC 704.

INSTALL ALL MATERIALS, FASTENERS, & COMPONENTS PER MANUFACTURER'S

SPECIFICATIONS & RECOMMENDATIONS

INSTALL ADDITIONAL BLOCKING AS NEEDED TO MEET ATTACHMENT REQUIREMENTS PER CRC TABLE R702.3.5

A PROJECT SITE WITHIN THE WILDLAND-URBAN INTERFACE FIRE AREA SHALL COMPLY WITH THE CWUIC 504.

ATTIC AREA

REQUIRED ATTIC

VENTING (NFA)

UPPER VENTING

REQUIRED (NFA)

LOWER VENTING

REQUIRED (NFA)
ATTIC 1 308 SF 1.03 SF 0.51 SF 0.51 SF

KEYNOTES
H09 ATTIC VENT (HIGH); UPPER VENTILATORS SHALL BE LOCATED NOT MORE THAN 3 FEET BELOW THE RIDGE OR HIGHEST POINT OF THE SPACE, MEASURED VERTICALLY. PAINT FINISH TO MATCH ROOF COLOR, SEE VENTING CALCS.

H10 ATTIC VENT (LOW); LOWER VENTILATORS SHALL BE LOCATED IN THE BOTTOM ONE-THIRD OF THE ATTIC SPACE PER R806.2 EXCEPTION 2. PROVIDE DAMPER TO PROVIDE 1" CLR. AIRSPACE WHERE REQ. PAINT FINISH TO MATCH ROOF COLOR, SEE VENTING CALCS.

K09 COMPOSITE ROOF SHINGLES, ROOF REFLECTANCE (0.1) MIN. ROOF EMITTANCE (0.85) MIN. SEE MATERIALS LEGEND FOR MORE INFORMATION.

L01 FASCIA; SEE DETAILS FOR MORE INFORMATION.

M01 GUTTER. CONNECT TO DOWNSPOUT. PROVIDE MEANS TO PREVENT ACCUMULATION OF LEAVES AND DEBRIS IN GUTTER PER CRC R337.5.4. SEE DETAIL 12/A-903.

M02 DOWNSPOUT TO SPLASH BLOCK BELOW. SEE DETAIL 23/A-901.

SCALE: 1/4" = 1'-0"A1-122

REFLECTED CEILING PLAN -
MID-CENTURY MODERN2
SCALE: 1/4" = 1'-0"A1-122
ROOF PLAN - NO COVERED PORCH OPTION3
SCALE: 1/4" = 1'-0"A1-122
ROOF PLAN - MID-CENTURY MODERN1
SCALE: 1/4" = 1'-0"A1-122

REFLECTED CEILING PLAN -
NO COVERED PORCH OPTION4

VENT TYPE COUNT
VENT
LENGTH

NET FREE

AREA PER
VENT

PROVIDED

NET FREE
AREA
LOWER

O'HAGIN SHINGLE ROOF VENT
(LOWER)
2 2' - 8" 0.50 SF 1.00 SF
UPPER
O'HAGIN SHINGLE ROOF VENT (UPPER) 2 2' - 8" 0.50 SF 1.00 SF

2.00 SF
VENTING NEEDED (BASED ON OPTION A):

VENTING PROVIDED (BASED ON OPTION A):

DATE
SHEET

THESE PLANS ARE PROVIDED BY THE CITY OF ANTIOCH AS

PART OF THE PRE-APPROVED ADU PROGRAM AND ARE
PUBLIC DOMAIN. THERE CANNOT BE A CHARGE TO
PROVIDE THESE PLANS. NO ALTERATIONS TO THESE PLANS
ARE ALLOWED. ALL ALTERATIONS MUST BE DONE UNDER A

SEPARATE PERMIT ONCE THE BUILDING PERMIT FOR THE

ADU HAS BEEN ISSUED AND FINAL INSPECTION
COMPLETED. IF YOU DO NOT HAVE THE CONSTRUCTION

KNOWLEDGE AND EXPERIENCE TO CONSTRUCT THESE

PLANS WITHOUT FURTHER DETAILS, IT IS RECOMMENDED
YOU HIRE A CONTRACTOR TO DO THE CONSTRUCTION.

THE CITY WILL NOT PROVIDE FURTHER INFORMATION OR

DETAILS AND BUILDING INSPECTORS WILL NOT PROVIDE
STEP BY STEP INSTRUCTIONS IN THE FIELD.

NO. REVISION DATE
Autodesk Docs://3981-01_Antioch ADU/3981-01_Antioch ADUs - Composite Model.rvt 8/19/2026 12:09:17 PM

ROOF PLAN & REFLECTED

CEILING PLAN - MID-CENTURY
MODERN

PRE-APPROVED ADU

CITY OF ANTIOCH
A1-122
08/19/26