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Updated: Apr 13, 2026
Location and Projects
Address
1336 GROVE STREET, San Francisco, CA, 94117
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Lewis M Merlo Engineer
Lewis M Merlo Inc, 1336 Grove St, San Francisco, CA (Employees: Daniel O'connor, Donald Scott Mac Lean, and John Mark Biasotti) holds a General Engineering, General Building, Concrete, Concrete Related Services, Earthwork And Paving license according to the California license board.
Their BuildZoom score of 108 ranks in the top 5% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Lewis M Merlo Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Lewis M Merlo Inc Contact Information
Phone Number: (415) 346-1066
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Address: 1336 GROVE STREET, San Francisco, CA 94117
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Lewis M Merlo Inc San Francisco
Quality
108
95th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Lewis M Merlo Inc has a BuildZoom score of 108, which places them above 95% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
|
2 projects
|
2024 |
Our building permit records indicate that Lewis M Merlo Inc has worked on at least
3.0 projects over the past 2 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
1 project
|
$5k-$20k |
|
1 project
|
$50k-$100k |
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Lewis M Merlo Inc Reviews
1 out of 5 stars, based on
1
review
-
By Steve L.August 3, 2020did not hire them - unprofessional and rude customer service
This is a sample of this contractor's permits. Click here to access their complete permit history.
New exterior paving and entry ramp
Valuation:
$75,000
Permit #:
202505146462
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
26 - misc group r...
Replacment of concrete parapet severly deteriorated with a new concrete parapet. 20lf along wall is falling hazard. we request expedited approval on an emergency basis
Valuation:
$5,000
Permit #:
202010227186
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Common area - patching foundation walls spalling concrete on sections of foundation
Valuation:
$15,400
Permit #:
202403157906
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Improvement to (e) retaining wall
Valuation:
$100,000
Permit #:
202305188056
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Rework existing parking to provide compliant parking space see also 202111152427
Valuation:
$12,500
Permit #:
202111172659
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
69 - parking lot
Remove an 8'x8 section of a garage slab to permit drain pipe repair repair slab drain pipe repair under seperate permit maher na
Valuation:
$65,000
Permit #:
201805310680
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Rework existing parking and provide compliant parking space
Valuation:
$25,000
Permit #:
202111152427
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
86 - prkng garage...
Installation of a bulk carbon dioxide tank on an existing mat foundation **constructed under approved permit application number #2015-0202-7208**(located adjacent to parking lot)
Valuation:
$10,000
Permit #:
201711204438
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
16 - manufacturing
Revision to pa#201412153758 revision foundation details to compensate for height differences
Valuation:
$55,000
Permit #:
201609208188
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Sidewalk structural repair. no work on any street facades sidewalk work only
Valuation:
$25,000
Permit #:
201603071321
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
10 - office
Elevator door infill at sidewalk
Valuation:
$32,000
Permit #:
201806071194
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
Tenant improvement. ferry building rear plaza. dock slab repair work: remove any loose concrete and patch check & remove any rust on rebar. pier 2 ferry building
Valuation:
$46,790
Permit #:
B-2014-0114
Status:
issued
Fee:
$1,078
Permit Type:
N/A
Building Type:
Dock/pier
Alter (e) lower passange way to include new gas room elec/utilities room trash room. locating sprinkler main & fire dept. hook-ups new rated walls framing excave & foundation work provided exterior work is pg&e and fire dept. requirements. fire sprinklers to be nfpa 13r under seperate
Valuation:
$80,000
Permit #:
201603293352
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Repair sidewalk to city standards (minimum 2% slope) repair due to damage from street tree. permit valid 30 days call pwa inspection prior to start: 510-238-3651. 4th floor contact: o doherty 415 346-1066 usa#: 011333
Valuation:
N/A
Permit #:
CGS16009
Status:
final
Fee:
$397
Permit Type:
N/A
Building Type:
N/A
Parking garage aka 80 hemlock st": repair of damaged concrete columns at 3 locations & repair of damaged concrete beam at 1. repair involves use of concrete repair mortar & steel framing
Valuation:
$20,000
Permit #:
202202107734
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
30 - prkng garage...
Ground floor: the structural work shown on these drawings consist of underpinning near a new elevator pit of existing wood framed building. ref. elevator pa# 201401287250
Valuation:
$30,000
Permit #:
201408214380
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
15 - retail sales
Comply with nov# 200565663. per plans: bolt down foundation. new shearwall & foundation. new shearwall & foundation. on north side property line. replace approx 30 & preform foundation raise at rear north side property line. repair framing members at north side property line
Valuation:
$85,000
Permit #:
200708159809
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Street space
Valuation:
N/A
Permit #:
M1214632
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
-
Street space
Valuation:
N/A
Permit #:
M1214631
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
-
Street space
Valuation:
$1
Permit #:
M1211047
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
-
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Projects
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Verified License
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Lewis M Merlo Inc License info
Verified License
| License # | 184527 |
| Status | Active |
| State | California |
| Type | General Engineering, General Building, Concrete, Concrete Related Services, Earthwork And Paving |
| Business Type | Corporation |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Lewis M Merlo Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
108
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Falls Lake Fire & Casualty Company |
103
Permits
- Building permit records show that Lewis M Merlo Inc has worked on 103 permitted projects.
Lewis M Merlo Inc Employees
DO
Daniel O'connor
Officer
DL
Donald Scott Mac Lean
Rmo/Ceo/Pres
JB
John Mark Biasotti
Officer
MM
Mario Elito Merlo
Rmo/Ceo/Pres
MO
Michelle Bridget O'connor
Officer
SM
Steven John Merlo
Officer
Unprofessional and rude customer service. This outfit promised a free estimate, but did not deliver it as promised, even after a 2 week wait.