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
Hiring this contractor?
Get alerts if their license status changes.
You're monitoring this license!
We'll email you if the license status, bond, or complaint history changes.
Something went wrong
Is this your business?
Claim your profile to manage your listing.
Claim request submitted!
We'll be in touch at the email you provided to verify your identity.
Something went wrong
T T CONSTRUCTION CO
- License Number
- 850832
- State
- California
- Status
- active
- Business Type
- Sole Owner
- Address
- 1418 43RD AVENUE SAN FRANCISCO, CA, 94122 San Francisco County
- Phone
- (415) 513 2928
License Dates
Issued
12/08/2004
Expires
12/31/2026
Expires in 9 months
CSLB Last Updated
12/02/2025
License Classifications
Personnel & Officers
TAM TIMOTHY JIN TIAN
Sole Owner
Contractor Bond
Amount: $25,000
Company: ATLANTIC SPECIALTY INSURANCE COMPANY
Bond #800213692
Effective: 09/30/2025
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
168 Niagara Av, 94112
legalize one bedroom, storage room, family rm, one full bathrm all work at ground floor.
$50,000
2015-07-16
otc alterations permit
962 Geneva Av, 94112
repair and replace car damage front metal gate, wall, exterior stucco wall and storefont windows. non-structural repair only.
$12,500
2015-06-08
otc alterations permit
1639 30th Av, 94122
reconstruct (e) bathroom on lower level; local installation of plywood sheathing on lower level walls per plan.
$30,000
2015-05-14
otc alterations permit
650 Banks St, 94110
replace (2) windows at front & (2) windows at rear in kind. all windows at street facade to be fiberglass.
$3,800
2014-01-23
otc alterations permit
650 Banks St, 94110
add new laundry closet, one new bedroom & one full bathroom on first floor per plan.
$32,750
2014-01-23
otc alterations permit
650 Banks St, 94110
remodel kitchen & bathroom 2/f; to comply with cec150(k) 8 & 10
$22,000
2014-01-23
otc alterations permit
43 Stoneyford Av, 94112
legalize 1 bedroom. relocate 1 e bath. 1 new bedroom, convert e storage room into laundry room. all work at gr fl
$28,000
2013-06-19
otc alterations permit
1390 Broadway, 94109
revision to pa# 201302200590. voluntary ground for seismic strenghtning - shear walls, bolting & holdowing.
$22,000
2013-04-05
otc alterations permit
1623 40th Av, 94122
kitchen remodel with same layout as existing.
$9,500
2012-06-20
otc alterations permit
525 Garfield St, 94132
kitchen remodel, same as existing layout, upgrade main electrical service panels, repl 5 existing windows and sliding at yard (back of house), max u factor .4 ;all (n) lighting must comply with cec 15
$20,000
2012-03-19
Showing 10 of 32 permits
Verify this record on the official state licensing board
View on Contractors State License Board (CSLB) →Learn how to verify contractor licenses in California
California licensing guide →Data sourced from official state licensing board records. Always confirm critical information directly with the state board.
Verify Another Contractor
Homeowner Resources
Other Licensed General Building Contractor in SAN FRANCISCO
BABCOCK & DONNE
License #951290 · CA
BAY AREA LIGHTWORKS INC
License #839612 · CA
STRAIGHTEDGE CONSTRUCTION
License #839704 · CA
KOBUKSAN CONSTRUCTION
License #839903 · CA
GREENFOREST BUILDERS
License #840054 · CA