M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
2 DINKLESPIEL STATION LN
ATHERTON, SAN MATEO COUNTY, CA
PRELIMINARY ESTIMATE OF PROBABLE CONSTRUCTION COST
BASED ON
APPROVED DRAWINGS SET (SD PHASE)
- WOOD RAMP
IN, BENCH SECTION -(N) STAFF PATIO
(N) PLANTING - STORAGE
- BENCH
WILLOW TREE HUT - (E) DECK - (E) FERNS
- MOVABLE TABLE & BENCHES
LOG EDGING - IN, PLANTING
- BARK - (N) BENCH SECTION
-(N) PAVER PATHWAY
-BOULDER MOUND
SIGN - LOG BENCH - STEPS
THE CHILDREN'S •BARK
NATURE GARDEN - 4' HIGH
FENCE
STAFF W/ GATE
ROOM
-BENCH
(E) PAVER- STUMP WALK -(E) STUMP
PATHWAY COLOR FIELD POSTS -WOOD STUMP •BOULDER
-WOOD LOG WALK
(E) TREES (E) UTILITY PADS - BARK
(E) FENCE (N) PLANTING - (E) STUMP -(E) REDWOOD
NATURAL BRANCH TUNNEL - TREE HOUSE TREES
REFLECTIVE STAINLESS - (N) FENCE 6' TALL
STEEL COLUMNS
PLANK WALK-
(E) BENCH—
OWNER:
SAN MATEO COUNTY LIBRARIES
PREPARED FOR:
MILLER COMPANY LANDSCAPE ARCHITECTS
PREPARED BY:
M LEE CORPORATION
Date: 11/12/2024
1699.1 Atherton Library Childrens Garden SD Estimate 20241112
M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
2 DINKLESPIEL STATION LN
ATHERTON, SAN MATEO COUNTY, CA
PRELIMINARY ESTIMATE OF PROBABLE CONSTRUCTION COST
BASED ON
APPROVED DRAWINGS SET (SD PHASE)
Table of Contents: Page No.
A) PROJECT CONTACT INFORMATION 3
B) BASIS OF ESTIMATE 4
C) ESCALATION CALCULATION 7
D) ESTIMATE SUMMARY 8
E) ESTIMATE DETAILS OF DIRECT COSTS 9
M LEE CORPORATION PROFILE 11
Date: 11/12/2024
M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
2 DINKLESPIEL STATION LN
ATHERTON, SAN MATEO COUNTY, CA
PRELIMINARY ESTIMATE OF PROBABLE CONSTRUCTION COST
BASED ON
APPROVED DRAWINGS SET (SD PHASE)
A) PROJECT CONTACT INFORMATION
OWNER:
SAN MATEO COUNTY LIBRARIES
Prepared for:
MILLER COMPANY LANDSCAPE ARCHITECTS
2973 16th Street, Suite 200
San Francisco, CA 94103
Attention: Jeffrey Miller, ASLA, LEED, AP
Email: [email protected]
Attention:Jingyan Zuo, RLA
Email: [email protected]
Prepared by:
M LEE CORPORATION
Construction Management & Consulting
601 Montgomery Street, Suite 2040
San Francisco, CA 94111
Attention: Franklin Lee, PE, LEED AP, CEP
Certified Estimating Professional
Email: [email protected]
Date: 11/12/2024
Prepared for: Miller Company Landscape I
renared by: M lee Cor A) Project Contact Information Page 3 of 11 M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
ESTIMATE OF PROBABLE CONSTRUCTION COST
APPROVED DRAWINGS SET (SD PHASE)
B) BASIS OF ESTIMATE Date: 11/12/2024
1 Basis of Estimate:
This Estimate is based on the following:
1.1 Atherton Library Children's Garden cost Estimation drawings by Miller Company Landscape Architects, 9 sheets with File name: 241021 Atherton Library Children's Garden Cost Estimation Drawing Set
1.2 Atherton Library Children's conceptual drawing by Miller Company Landscape Architects dated 10/06/2024, 1 sheet with File name: Atherton Library Concept Design 241106
1.3 Existing site condition photos from 5/20/2024 site visit by LA
1.4 Price quotes from different site furnishing vendors.
1.5 Clarifications from designer
1.6 Incorporating comments from draft estimate dated 11/07/2024. 2 General Scope of Work
The general scope is to renovate the children's playground with the following major components:
2.1 Removal of Existing Decomposed Granite and Planting/Landscape.
2.2 Site preparation, Site clearing & grubbing, grading.
2.3 New wooden deck, railings, new gates and fences.
2.4 New Site furnishing items like Tree House, Willow Hut, Natural Branch Tunnel, color posts, reflective stainless steel mirrors, boulders, stump seating, moveable bench and chairs, etc.
2.5 Landscape development involving new planting and irrigation
2.6 Furnish new Garden Entrance signage.
3 Exclusions
The estimate specifically excludes the following items:
3.1 Permit and plan check fees
3.2 Administration costs such as bidding, advertising and contract award
3.3 Professional fees for architect, engineers, consultants, construction management and other soft costs
3.4 Costs for third party testing, inspections and sample confirmation
3.5 Construction change orders
3.6 Project reserve and project contingency
3.7 Cost escalation beyond the assumed construction schedule It is assumed that the above items, if needed, are included elsewhere in the owner's overall project budget.
4 Assumptions & Qualifications
4.1 The work will be done in one continuous phase during normal work hours.
4.2 Based on one construction general contract.
Prepared for: Miller Company Landscape A.
Prepared by: M Lee Corp B) Basis of Estimate Page 4 of 11 M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
ESTIMATE OF PROBABLE CONSTRUCTION COST
APPROVED DRAWINGS SET (SD PHASE)
B) BASIS OF ESTIMATE Date: 11/12/2024
4.3 The estimate is based on estimated prices current as of Oct 2024, with four to five responsible and responsive bids under a competitive bidding environment for a fixed price lump sum contract (a fair market condition).
Note: Experience indicates that fewer bidders may result in higher bids, and conversely more bidders may result in more competitive bids. Therefore it is important to obtain as many bids as possible.
The following table provides a general guideline for probable impacts due to number of bids:
1 bid +20% to +50%
2-3 bids +10% to +20%
4-5 bids 0% to +10%
6-7 bids 0% to - 10%
8 or more bids - 10% to -20%
4.4 The following is a list of some items that may affect the cost estimate:
Modifications to the scope of work or assumptions included in this estimate Unforeseen sub-surface conditions
Any specified item of equipment, material, or product that cannot be obtained from at least three different sources
Any other non-competitive bid situations
4.5 Unit costs include costs for material, labor, equipment, sales tax, and contractor's markup. Labor costs are based on prevailing wages for San Mateo County.
4.6 Construction Schedule and Cost Escalation: Please see Escalation calculations for more details.
4.7 The estimate represents M Lee Corp's opinion of probable construction costs based on current market conditions and the assumptions and qualifications in this Basis of Estimate.
4.8 Client acknowledges that our estimating service is consistent with and limited to the standard of care applicable to such services, which is that we provide our services consistent with the professional skill and care ordinarily provided by consultants practicing in the same or similar locality under the same or similar circumstances. The estimate is intended to be a determination of fair market value for the project construction. Since we have no control over market conditions, costs of labor, materials, equipment and other factors which may affect the bid prices, we cannot and do not warrant or guarantee that bids or ultimate construction costs will not vary from the cost estimate. We make no other warranties, either expressed or implied, and are not responsible for the interpretation by others of the contents herein the cost estimate.
4.9 It should be noted that the cost estimate is a "snapshot in time" and that the reliability of this opinion of probable construction cost will inherently degrade over time.
Prepared for: Miller Company Landscape A.
Prepared by: M Lee Corp B) Basis of Estimate Page 5 of 11 M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
ESTIMATE OF PROBABLE CONSTRUCTION COST
APPROVED DRAWINGS SET (SD PHASE)
B) BASIS OF ESTIMATE Date: 11/12/2024
4.10 The estimate has been prepared based on preliminary information and design assumptions which are subject to verifications and changes as the design progresses.
An updated estimate should be prepared when more specific and detailed design information is available
4.11 Abbreviations used in the estimate:
CY = Cubic Yard
(E) = Existing
EA = Each
LF = Linear Foot
LFR = Linear Foot Of Stair Riser
LS = Lump Sum
MTH = Month
(N) = New
NIC = Not In Contract
OFCI = Owner Furnished, Contractor Installed
PR = Pair
SF = Square Foot
Prepared for: Miller Company Landscape A.
Prepared by: M Lee Corp B) Basis of Estimate Page 6 of 11 M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
ESTIMATE OF PROBABLE CONSTRUCTION COST
APPROVED DRAWINGS SET (SD PHASE)
C) ESCALATION CALCULATION Date: 11/12/2024
Estimate Pricing Date 11/6/2024
Construction Start 3/15/2025
Construction End 5/15/2025
61 days
Construction Duration
2 months
Construction Mid-Point 4/14/2025
Estimate Pricing Date to 160 days
Construction Mid-Point 5 months
Escalation Rate Esc/year Pro-rated Total Escalation
Escalation from Nov 2024$
Nov 2024 Costs 100%
2024 Escalation, Dec 6.0% 1.00% 101.00%
2025 Escalation, Jan to Apr (construction midpt) 5.0% 1.60% 102.60% Escalation to Construction Midpoint (Carried to Estimate Summary) >> 2.60% Prepared for: Miller Company Landscape A.
Prepared by: M Lee Corp C) Escalation Calculation Page 7 of 11 M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
ESTIMATE OF PROBABLE CONSTRUCTION COST
APPROVED DRAWINGS SET (SD PHASE)
D) ESTIMATE SUMMARY Date: 11/12/2024
Item Item Description Estimated Cost $
1 Site Demolition 10,540
2 Site Preparation 3,289
3 Site Utilities 440
4 General Site Work, Paving and Walks 71,187
5 Site Furnishings 160,307
Playground Equipment None -
Irrigation 8,538
Planting 14,230
Direct Estimated Cost 268,531
Markups (compounded):
Design Phase Estimating Contingency 18.0% 48,336
General Conditions 15.0% 40,280
General Contractor OH&P 10.0% 35,715
Insurance and Bonds 2.5% 9,822
Total Estimated Construction Cost in Nov 2024 402,684
Escalation to Midpoint of Construction, Apr 2025 2.6% 10,470 Total Estimated Construction Cost, Escalated 413,154
for Base Scope
Playground Area 6,690 GSF
$/GSF $62/GSF
1) The above are construction costs escalated to assumed midpoint of construction 2) No soft cost or project contingency/reserves have been included. 3) Based on 4 to 5 competitive bids.
4) It is important to read the attached "Basis of Estimate" and "Estimate Details" for assumptions, exclusions, qualifications and scope of work
Prepared for: Miller Company Landscape A
renared bv: Mlee Cori D) Estimate Summary Page 8 of 11
M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
ESTIMATE OF PROBABLE CONSTRUCTION COST
APPROVED DRAWINGS SET (SD PHASE)
E) ESTIMATE DETAILS OF DIRECT COSTS Date: 11/12/2024
Line Item Component Description Quantity Unit Unit Cost Estimated Cost $
1 1 Site Demolition
4 Existing Planting to be removed 1,398 SF 2.10 2,936
Existing Decomposed Granite to be removed 430 SF 4.10 1,763 6 Protect in Place(E) Planting Area 241 SF 1.00 241
Protect in Place(E) Trees 12 EA 200.00 2,400
8 Miscellaneous Demo 1 LS 3,200.00 3,200
10 12 1 Subtotal - Site Demolition 10,540
13 14
15 2 Site Preparation
16 17 Grading 1,430 SF 2.30 3,289
18 19
20 2 Subtotal - Site Preparation 3,289
21 22
23 3 Site Utilities
24 Protect in Place(E) Utility Pad 1 LS 440,00 440
25 26
27 3 Subtotal - Site Utilities 440
28 29
30 4 General Site Work, Paving and Walks
31 32 Unit Pavers over 2" Mortar setting Bed 24.00 18,408 767 SF
33 4" Permeable Aggregate Base 9 CY 110,00 990
34 Steel Edging 82 LF 36.00 2,952
35 Pea Gravel through Building edge 92 LF 4.40 405
36 37 Wood Mulch 2420 SF 1.70 4,114
38 39 Wood Ramp Decking 337 SF 36.00 12,132
40 Footing for Wooden Deck 16 EA 480.00 7,680
41 6x12 Grade Beam 6 LF 82.00 492
42 2x6 PT RWD Joist 126 LF 36.00 4,536
43 4x6 PT RWD Beam 23 LF 42.00 966
44 Class I! Aggregate Base to retain Grade 1 CY 110.00 110 45 Wood Railing 83 LF 150.00 12,450
46 Steel Handrail 64 LF 93.00 5,952
47 -
48 49 4 Subtotal - General Site Work, Paving and Walks 71,187 50 51
52 5 Site Furnishings
53 54 Tree House 1 EA 21,700.00 21,700
55 Willow Hut 1 EA 14,125.00 14,125
Prepared for: Miller Company Landscape A.
Prepared by: M Lee Corp E) Estimate Details Page 9 of 11 M Lee Corporation
ARTHERTON LIBRARY CHILDREN'S GARDEN
ESTIMATE OF PROBABLE CONSTRUCTION COST
APPROVED DRAWINGS SET (SD PHASE)
E) ESTIMATE DETAILS OF DIRECT COSTS Date: 11/12/2024
Line Item Component Description Quantity Unit Unit Cost Estimated Cost $
56 Wood Stairs(4 Risers) 16 LFR 57.00 912
57 Wood Stumps 12 EA 310.00 3,720
58 Reflective Steel Mirror Column 4 EA 2,400.00 9,600
59 Footing for Mirror Column 4 EA 320.00 1,280
60 4' High Fence 30 LF 130.00 3,900
61 4' High Gate 1 EA 1,100.00 1,100
62 Footings for Fence 8 EA 300.00 2,400
63 6' High Fence 107 LF 190.00 20,330
64 Footings for Fence 25 EA 300.00 7,500
65 Lattice Top at Fence 39 LF 67.00 2,613
66 Garden Entrance Gate 1 EA 1,200.00 1,200
67 Log Edging 126 LF 58.00 7,308
68 Drain Rocks below Log Edge 5 CY 100.00
69 Tree Stump 12 EA 320.00 3,840
70 3/4"' Drain Rock 4" thick below Stumpwalk 90 SF 50.00 4,500 71 Stepping Stones over 4" Sand setting Bed 10 EA 200.00 2,000 72 Wood Planks 8 EA 81.00 648
73 Natural Branch Tunnel EA 8,000.00 8,000
74 Boulder Mound 11 EA 720.00 7,920
75 Storage 1 EA 6,000.00 6,000
76 Bench Extension 15 LF 500.00 7,500
77 Moveable Table and Chair, FF&E NIC
78 Color Post 31 EA 81.00 2,511
79 Log Bench 2 EA 6,600.00 13,200
80 Simple Log Bench 2 EA 3,000.00 6,000
81 82
83 5 Subtotal - Site Furnishings 160,307
84 85
86 6 Playground Equipment None
87 -
88 89 6 Subtotal - Playground Equipment
90 91
92 7 Irrigation
93 94 Allowance for Irrigation new Planting Area 1,423 SF 6.00 8,538 95 96
97 7 Subtotal - Irrigation 8,538
98 99
100 8 Planting
101
102 Planting Area shrub and ground cover 1423 SF 14,230 103
104
105 8 Subtotal - Planting 14,230
Prepared for: Miller Company Landscape A.
Prepared by: M Lee Corp E) Estimate Details Page 10 of 11
M LEE CORPORATION
Construction Management & Consulting
Estimating & Scheduling
Since 1992
M Lee Corporation
M Lee Corporation was established in the San Francisco Bay Area in 1992 to provide quality construction cost estimating, scheduling and construction, program and project management support services. Since its incorporation, M Lee Corporation has provided professional construction services fo over 1,500 projects with an estimated value of over $77 billion, spanning all services and disciplines, scopes and sizes. Having worked in the San Francisco Bay Area over the last 32 years, our knowledge of the local construction market has proved to be a valuable asset to our clients.
Key Professionals
Martin Lee
Founding principal and chief estimator of M Lee Corporation, Martin is a professional civil engineer (PE), chartered quantity surveyor (CQS), and certified professional estimator (CPE) - Lifetime by ASPE with over 40 years of practical experience in construction cost management and consulting services in the San Francisco Bay Area. Prior to establishing M Lee Corporation, Martin gained extensive experience working with a renowned general contractor/construction management firm and an 3222 international cost consulting firm. Working on over 1,500 projects with an estimated construction value of over $77 billion, Martin is knowledgeable of local construction practice and pricing. He enjoys and excels in construction cost and schedule management.
Franklin Lee
Principal and project manager/senior cost estimator of M Lee Corporation, Franklin is a professional civil engineer (PE), LEED accredited professional and certified estimating professional (CEP) by AACE Franklin Lee holds a B.S. in Civil and Environmental Engineering from University of California, Berkele and a M.S. in Construction Engineering and Management from Stanford University. Prior to joining M Lee Corporation, Franklin worked for a nationally renowned general contractor/construction management firm. Franklin has provided cost estimating, scheduling and project management services on over 500 projects in the San Francisco Bay Area over the past 16 years.
Contacts
Martin Lee, PE, CPE, CQS
Office: (415) 693-0236
Mobile: (415) 298-2136
Email: [email protected]
601 Montgomery Street, Suite 2040
San Francisco, CA 94111
Franklin Lee, PE, CEP, LEED AP
Office: (415) 693-0236
Mobile: (415) 999-5629
Email: [email protected]
601 Montgomery Street, Suite 2040
San Francisco, CA 94111