January 16, 2023
Item No. 16
Accessory Dwelling Units
Code and LCP Amendments
City Council
January 24, 2023
Jaime Murillo, Principal Planner
[email protected]
(949) 644-3209
Major Changes in Standards
State Law
• Increased Height limits for Detached ADUs
• 16' for single-family or multi -family
• 18' with multi -family, multi -story
• 18' if located within %2 mile to transit (regardless of zone) • 2' additional to match roof pitch of main home
• Recommendation for Detached ADUs
• 18' flat roofs/20' sloping roofs (3:12 pitch)
• Simplifies a complicated code (reduces errors)
0_ Building Height.
a. I nterna I. Accessory dwel I i ng u n its and jurnia r accessory dwel I i ng u n its intern al to an existing or proposed single -unit cr rnulti-unit dwelling shall comply with the height Iirnit as required by underlying zoning district-
b. Attached. Accessory dwelling units and junior accessory dwelling units attached to an existing or proposed single -unit cr multi -unit dwelling shall comply with the height limit as required by underlying zoning district.
c. Detached accessory dv+re I I i n g u n its s ha l l n of exceed a h eig ht of s ixtee n (16) feet except as noted below -
IF An accessory dwelling unit con s#ru cted on a lot with an existing c r pro p os e d m u Iti-u n it, m u Ki-story d e I ling shay I n of exceed a he ig h# of eig h#een (# 8) feet. i i . An accessory dwelling unit constructed above a detached garage shall n of exceed two (2) stories a nd the max i m u rn a I I enable height of the anderly i ng zon in q district, provided the accessory dwelling unit meets the minimum setbacks required by underlvina zonina district and DrinciDal dweIlina unit cornDIies with Darkino standards set forth in Section 20.40.040
i ii. An accessory dwel I i ng u n it con stru cted on a lot with a n existi ng o r pre pose d sin g le-u n it or m u Iti-u n it d we I ling #h at is located within c ne-half mi le walking d istance of a major #ran sit sto p o r h ig h-q u ality tra ns it corridor, as those to rms a re defined in Section 21155 of the Public Resources Code shall not exceed a height of eig h#een ( 18 ) feet. An ad d itional two (2 ) feet i n he ig ht s h a I I be perm i#ted to a ccorn m od ate a roof pitch on #h e access ory dwell i na u n it th at i s alia ned with the roof itchy of the primary unit
Major Transit Stops and HQTC
AOAh9S
COSTA
MESA
TAC 25
IRVINE
1j
►414
Existing Metrolink Stations
2019 High Frequency Corridors
OC Streetcar (anticipated operation 2024)
2019 Major Transit Stops
2019 Half -Mile High Frequency Corridors
Source: OCTA
D 1 2
(?�
Miles