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Updated: Jan 04, 2026
Location and Projects
Address
554 CLAYTON ST P O BOX 170430, San Francisco, CA, 94117
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Shamrock Western Corporation Engineer
Shamrock Western Corporation, 554 Clayton St, Po Box 170430, San Francisco, CA (Employees: Eleanor Margaret Ferrari, Michael Robert Ferrari, and Roy Ferrari) holds a General Engineering, Building Moving, Demolition, General Building, Well Drilling license according to the California license board.
Their BuildZoom score of 103 ranks in the top 10% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Shamrock Western Corporation, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Shamrock Western Corporation Services
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Shamrock Western Corporation Contact Information
Phone Number: (650) 766-3838
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Address: 554 CLAYTON ST P O BOX 170430, San Francisco, CA 94117
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Shamrock Western Corporation San Francisco
Quality
103
90th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Shamrock Western Corporation has a BuildZoom score of 103, which places them above 90% of 336,931 contractors in California.
Activity
|
3 projects
|
2025 |
|
1 project
|
2024 |
|
3 projects
|
2023 |
Our building permit records indicate that Shamrock Western Corporation has worked on at least
7.0 projects over the past 3 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 |
|
2 projects
|
$50k-$100k |
|
1 project
|
$250k-$500k |
|
2 projects
|
$500k-$1mil |
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.
Building Permits by Shamrock Western Corporation
This is a sample of this contractor's permits. Click here to access their complete permit history.
Unit 1208: remove and replace sliding glass doors/window across living room and two bedrooms. no chamge in layout or foundation brushed stainless steel frame non street visible back of building. in kind in same opening. mxa u. factor 0.58 unit 1208
Valuation:
$58,000
Permit #:
202509125230
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Tenant improvement of existing business/research facility in fremont. new shipping and receiving area conference room and office. scope includes demolishing existing partitions; and addition of new partitions new ceilings new lighting and revised mep
Valuation:
$300,000
Permit #:
BLD2024-02130
Status:
complete
Fee:
$7,152
Permit Type:
New tenant space
Building Type:
N/A
Drl: interior office tenant improvement with proposed offices break room and new bathrooms. scope of work to include new light gauge partitions finishes lighting and associated mep work. exterior improvements include the demolition of an existing window for the addition of a new exterior rollup and man door. concurrent pln2022-00393
Valuation:
$750,000
Permit #:
BLD2022-08088
Status:
complete
Fee:
$31,269
Permit Type:
Alteration
Building Type:
N/A
Tenant improvement of existing business/research facility in fremont. scope includes demolishing existing partitions addition of new partitions new roll-up door and revised mep
Valuation:
$500,000
Permit #:
BLD2024-02126
Status:
complete
Fee:
$10,146
Permit Type:
New tenant space
Building Type:
N/A
Interior tenant improvement to turn existing rooms into clean rooms. scope includes demolition of existing partitions and act ceiling; and addition of new partitions new act ceiling new lighting new mechanical unit and revised mep and structural as needed
Valuation:
$750,000
Permit #:
BLD2022-07211
Status:
complete
Fee:
$11,923
Permit Type:
Alteration
Building Type:
N/A
Removal of door at vestibule and relocation of door at conference room. modification of the hvac system to serve the new spaces using new vav boxes
Valuation:
N/A
Permit #:
BLD2024-02130-001
Status:
triage
Fee:
$517
Permit Type:
N/A
Building Type:
N/A
*rev1 (dm 3/2/2023) revision: adding sheet 2-2.1 structural repair of the trenches in the slab-on-grade science corporation alameda suite 100 trench & install underground plumbing; backfill with native dirt & cap with concrete (bldg/elec/plumbing)
Valuation:
$3,000
Permit #:
CB22-0471-REV1
Status:
final
Fee:
$528
Permit Type:
N/A
Building Type:
N/A
Science corporation alameda suite 100 trench & install underground plumbing; backfill with native dirt & cap with concrete (bldg/elec/plumbing)
Valuation:
$75,000
Permit #:
CB22-0471
Status:
final
Fee:
$3,176
Permit Type:
N/A
Building Type:
N/A
Remove and replace stucco at the rear of the building to match the (e) facade. the front facade will remain unchanged. decorative trim detailing will be replaced in kind as required. approx 300 sf
Valuation:
$50,000
Permit #:
202412177022
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Installation of equipment along with associated mep for operability
Valuation:
$10,000
Permit #:
BLD2023-02303
Status:
expired
Fee:
$385
Permit Type:
Other
Building Type:
N/A
T.i.: lower level: install new 713 sq. ft. commercial kitchen in lower level at rear of (e) warehouse for off-site catering business. remove (e) barn door and replace with new roll-up door different size. remodel reconfigure (e) lobby & restroom area at front of warehouse by creating employee break room with lockers and ada restroom. create new janitor closet. electrical upgrades. up... see more
Valuation:
$115,000
Permit #:
BLD2013-00381
Status:
final
Fee:
$8,279
Permit Type:
N/A
Building Type:
N/A
Remodel interior to meet current code by remodel kitchen with all new cabinets counter tops - convert existing bathroom to two new baths remove (e) wrap around porch - replace with new covered porch resubmittal #1 azs 04-27-04 - response to comments down sized wrap around porch increased road width for fire revision #1 czn 9/9/04 adding vaulted ceilings to kitchen-family room area rev... see more
Valuation:
$230,430
Permit #:
BLD2003-01685
Status:
final
Fee:
$8,811
Permit Type:
N/A
Building Type:
N/A
75% addition remodel - remodel to 1st floor: reconfigure existing living dining family kitchen and entry. reconfigure 3 bedrooms to exercize room mudroom hall closet and entry to new garage. addition to first floor: 807.20 s.f. new kitchen pantry entry. extending patio 400 s.f. with fireplace and bbq. addition of new garage 650 s.f. second story addition: master suite with bathroom. ... see more
Valuation:
$415,908
Permit #:
BLD2007-01160
Status:
final
Fee:
$32,023
Permit Type:
N/A
Building Type:
N/A
New barn next to what they call the upper barn; equipment & hay storage: no utilities resubmittal # 1 - jpb - 07/17/06 - fire dept comments including details on existing driveway and water tanks. resubmittal #2 azs 09-28-06 - soils report resubmittal #3 rmm 10-23-06 response to planning comments height verification datum point and its ele garage slab f.f and ridge on elevations page a... see more
Valuation:
$4,899
Permit #:
BLD2006-00436
Status:
final
Fee:
$12,811
Permit Type:
N/A
Building Type:
N/A
Barn porch coastal development permit exemption cd exemption to addition a 400 sq/ft porch to an existing agricultural barn
Valuation:
$0
Permit #:
PLN2005-00077
Status:
Approved
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Attach a new porch roof with supporting wall section to existing front of barn
Valuation:
$7,500
Permit #:
BLD2005-00180
Status:
final
Fee:
$2,935
Permit Type:
N/A
Building Type:
N/A
Building electrical mechanical plumbing plancheck
2003-08-20
Commercial tenant improvement laundromat
Valuation:
$75,000
Permit #:
2003-0735
Status:
final
Fee:
N/A
Permit Type:
Tenant improvement
Building Type:
N/A
Demolish 8 x 10 aluminum shed
Valuation:
$100
Permit #:
BLD2009-00122
Status:
final
Fee:
$316
Permit Type:
N/A
Building Type:
N/A
New retaining walls 501 lf max 4 high
Valuation:
$15,000
Permit #:
B09-0176
Status:
expired
Fee:
$1,434
Permit Type:
N/A
Building Type:
N/A
Rebuild single family residence 4950 sf main floor 2605 sf habitable cellar; 2745 sf attached cellar level garage; 906 sf concrete decks; temp power pole
Valuation:
$1,380,000
Permit #:
B08-0832
Status:
expired
Fee:
$58,769
Permit Type:
N/A
Building Type:
N/A
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Shamrock Western Corporation Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Shamrock Western Corporation License info
Verified License
| License # | 704019 |
| Status | Active |
| State | California |
| Type | General Engineering, Building Moving, Demolition, General Building, Well Drilling |
| Business Type | Corporation |
- BuildZoom verified this license was active as of January 2026.
Verify this license's status for Shamrock Western Corporation at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
103
BuildZoom Score
Bonded
| Bonded Agent | The Guarantee Company Of North America Usa |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Zurich American Insurance Company |
10
Permits
- Building permit records show that Shamrock Western Corporation has worked on 10 permitted projects.
Shamrock Western Corporation Employees
EF
Eleanor Margaret Ferrari
Officer
MF
Michael Robert Ferrari
Officer
RF
Roy Ferrari
Rmo
RF
Roy Ferrari
Rmo / Ceo / Pres