License is active
Source: Contractors State License Board (CSLB)
Licensed
Current and in good standing
Bonded
$25,000 surety bond
WC exempt
No employees — exempt from requirement
Clean record
No complaints or disciplinary actions
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FOUR SQUARE
- License Number
- 937978
- State
- California
- Status
- active
- Business Type
- Sole Owner
- Address
- 250 PARNASSUS 304 SAN FRANCISCO, CA, 94117 San Francisco County
- Phone
- (415) 244 3407
License Dates
Issued
09/21/2009
Expires
09/30/2027
Expires in 18 months
CSLB Last Updated
10/07/2025
License Classifications
Personnel & Officers
O'MAHONEY TIMOTHY DURKEE
Sole Owner
Contractor Bond
Amount: $25,000
Company: WESTERN SURETY COMPANY
Bond #67486498
Effective: 09/29/2025
Workers' Compensation
Owner/officer with no employees — exempt from WC requirement
CSLB designation: Exempt
Complaints & Disciplinary History
This reflects CSLB's bulk license data. For detailed complaint history including pending investigations, check the official CSLB record.
Building Permits
Source: LA City Open Data (LADBS)
otc alterations permit
4966 17th St, 94117
50 sqft in kind bathroom remodel. no structural changes. new tub, shower, toilet, vanity, & lights.
$25,000
2025-06-06
otc alterations permit
124 Rivoli St, 94117
unit #2: partial kitchen renovation: new counters, sink, faucet, garbage disposal. upgrade electrical panel. add shutoff valves in kitchen.
$13,000
2022-11-22
otc alterations permit
356 Connecticut St, 94107
revision to pa#201708013579. remove brick chimney. patch walls w/ 5/8" type x gypsum board in kitchen & bedroom above.
$4,900
2018-06-28
otc alterations permit
356 Connecticut St, 94107
half bath 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
$25,300
2017-08-01
otc alterations permit
2542 Great Hy, 94116
to obtain a final inspectionfor work already approved under pa# 201603101667 & 201603101662
$1
2017-04-27
otc alterations permit
2542 Great Hy, 94116
renewal 201409267387, 201405024759
$1
2016-03-10
otc alterations permit
2542 Great Hy, 94116
revision to 201409267387 (renewed permit 201603101662) to reflect site consitions of rear deck and stair. no change to footprint
$1
2016-03-10
otc alterations permit
2542 Great Hy, 94116
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 wa
$16,800
2015-03-09
otc alterations permit
2542 Great Hy, 94116
repair/replace rotted deck railing, bring in to code compliance. replace rotted rim. not street visible.
$5,500
2014-05-02
otc alterations permit
1565 Sacramento St, 94109
unit #1: (1) bath remodel, new tub, toilet and vanity
$9,800
2013-05-23
Showing 10 of 15 permits
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