Updated: Apr 19, 2026
Location and Projects
Address
250 PARNASSUS 304, San Francisco, CA, 94117
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Four Square Construction
Four Square, 250 Parnassus, San Francisco, CA (Owned by: Timothy Durkee O Mahoney) holds a General Building license according to the California license board.
Their BuildZoom score of 94 ranks in the top 24% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Four Square, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Four Square Services
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Four Square Contact Information
Phone Number: (415) 876-1595
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Address: 250 PARNASSUS 304, San Francisco, CA 94117
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Four Square San Francisco
Quality
94
76th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Four Square has a BuildZoom score of 94, which places them above 76% of 336,931 contractors in California.
Activity
|
1 project
|
2025 |
Our building permit records indicate that Four Square has worked on at least
1.0 project over the past year.
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
|
$20k-$50k |
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.
This is a sample of this contractor's permits. Click here to access their complete permit history.
In kind bathroom remodel: two new gfci outlets new ceiling and vanity lights. new exhaust fan. 3 lights 3 switches 2 receptacles 1 fan
Valuation:
N/A
Permit #:
E202506063021
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
50 sqft in kind bathroom remodel. no structural changes. new tub shower toilet vanity & lights
Valuation:
$25,000
Permit #:
202506068149
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
28 - 2 family dwe...
Bathroom remodel replace toilet vanity tub and shower
Valuation:
N/A
Permit #:
PP20250606730
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Half bathroom remodel; replace 1 window in kind (back of house) u factor not > 32; remove wall tiles replace gypboards; replace balcony railing in kind install vent hood & soffit in kitchen install washer dryer. hookup in back room; addition kitchen cabinets outlets by stove
Valuation:
$25,300
Permit #:
201708013579
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Unit #2: move federal pacific panel out of a closet to the hallway. install new 20a circuit in bathroom. install additional 20a circuit in kitchen with 4 additional outlets. addition new outlet in primary bedroom and living room
Valuation:
N/A
Permit #:
E202211223722
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Revision to pa#2014-0502-4759. replace more than 50% of (e) deck. replace entire deck & repair rotted siding as needed. replace adjacent drywall as needed in basement repair upper adjacent parapet wall as needed
Valuation:
$20,000
Permit #:
201409267387
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Unit #2: partial kitchen renovation: new counters sink faucet garbage disposal. upgrade electrical panel. addition shutoff valves in kitchen
Valuation:
$13,000
Permit #:
202211227073
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Revision to 201409267387 (renewed permit 201603101662) to reflect site consitions of rear deck and stair. no change to footprint
Valuation:
$1
Permit #:
201603101667
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Breakfast room remodel kitchen wall/ceiling repair remvoe partition walls & cabinets create 1/2 height wall @ dining room addition doorway remove tile from walls repair/replace ceiling plaster where damaged
Valuation:
$4,500
Permit #:
201207245551
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Kitchen and bathroom remodel: fireplace hearth tile. new counters and floor; remove 4 uppers & suffit. replace appliances in kind. new pendant lights and gfi. new tile floor and shower surround. new vanity new switches new closet access
Valuation:
$18,500
Permit #:
201012096433
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
Bathroom renovation mold remediation in ceiling adjacent walls and pantry replace rotten framing; repl back door repl bathroom window same size and location; no change on walls
Valuation:
$9,000
Permit #:
201304225127
Status:
complete
Fee:
N/A
Permit Type:
N/A
Building Type:
24 - apartments
To obtain a final inspectionfor work already approved under pa# 201603101667 & 201603101662
Valuation:
$1
Permit #:
201704274997
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Unit #2: install undersink shutoff valves replace kitchen sink and faucet
Valuation:
N/A
Permit #:
PP20221122275
Status:
expired
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Revision to pa#201708013579. remove brick chimney. patch walls w 5/8 type x gypsum board in kitchen & bedroom above
Valuation:
$4,900
Permit #:
201806283210
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Bl: business license for a retail clothing boutique. *** location: on the south side of lincoln center road 300 west of pacific avenue *** use type: retail sales and service- primary *** history: bl-0400309 bl-03-81
Valuation:
$0
Permit #:
BL-0700060
Status:
FINAL
Fee:
$489
Permit Type:
N/A
Building Type:
N/A
Addition place of entertainment. per sfbc 106a.1.12. no work to be done under this permit floor plan to be as per approved pa#201104013336. owner to obtain entertament lic. from entertainment commission
Valuation:
$1
Permit #:
201106248918
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
05 - food/beverag...
Revised whole house remodel
Valuation:
N/A
Permit #:
BLD2015-00439
Status:
final
Fee:
$8,723
Permit Type:
Interior remodel
Building Type:
N/A
Repair/replace rotted deck railing bring in to code compliance. replace rotted rim. not street visible
Valuation:
$5,500
Permit #:
201405024759
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Renewal 201409267387 201405024759
Valuation:
$1
Permit #:
201603101662
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
27 - 1 family dwe...
Bathroom & pantry - move pantry light & switch addition gfci receptacle to bathroom - 1 light 1 switch 2 receptacles
Valuation:
$0
Permit #:
E20130422152
Status:
ISSUED
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
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Four Square Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Four Square License info
Verified License
| License # | 937978 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Sole Ownership |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Four Square at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
Bonded
| Bonded Agent | Suretec Indemnity Company |
| Bond Value | $15,000 |
15
Permits
- Building permit records show that Four Square has worked on 15 permitted projects.
Four Square Employees
TM
Timothy Durkee O Mahoney
Owner
TO
Timothy Durkee O'mahoney
Sole Owner