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License is active

Source: Contractors State License Board (CSLB)

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Licensed

Current and in good standing

✓

Bonded

$25,000 surety bond

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Insured

Workers' comp coverage on file

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Clean record

No complaints or disciplinary actions

California licensing requirements →

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SINCERE CONSTRUCTION COMPANY INC

License Number: 557739
State: California
Status: active
Business Type: Corporation
Address: PO BOX 298 BRISBANE, CA, 94005 San Mateo County
Phone: (415) 806 3680

License Dates

Issued

02/21/1989

Expires

04/30/2027

Expires in 13 months

Reissued

04/29/2009

CSLB Last Updated

01/02/2026

License Classifications

B General Building Contractor

Personnel & Officers

WONG DANIEL DA YAO| HUANG DA YAO

Chief Executive Officer/President

Former

WONG JAMSON

Responsible Managing Officer/Chief Executive Officer/President

Active

WONG JOHNNY

Officer

Former

Contractor Bond

Bonded

Amount: $25,000

Company: HUDSON INSURANCE COMPANY

Bond #30123631

Effective: 07/08/2023

Workers' Compensation

Has policy

Carrier: EVEREST PREMIER INSURANCE COMPANY

Policy #7600010640261

Effective: 01/01/2026

Expires: 01/01/2027

CSLB designation: Workers' Compensation Insurance

Complaints & Disciplinary History

No disciplinary actions on file

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

2111 Baker St, 94115

repair foundation, 3 studs and 6x6 post at left side of garage door. (truck ran into garage door) to comply with complaint #2021-81787.

filed

otc alterations permit

1667 Green St, 94123

structural revision to pa# 2017-09222-9309.

cancelled

otc alterations permit

828 Brannan St, 94103

revision to 201012247378. reduce the size of 2 small upper floor level spaces to qualified as a mezzanine floors on one huge tenant ground floor space within the building.

cancelled

additions alterations or repairs

7333 Geary Bl, 94121

convert garage into a 316 sq ft adu (studio).

$25,000

cancelled

additions alterations or repairs

94 Bernal Heights Bl, 94110

interior remodel of (e) 3 story with basement sfd. reconfigure for 5 bedrooms, 4.5 bathroom layout. expand rear of building underneath 3rd floor to grade below (e) basement to be excavated & converted

$856,000

approved

otc alterations permit

3440 20th St, 94110

revision to pa #2012.03.28.7017 - at request of bldg inspector, file as-built drawing shown field.

cancelled

otc alterations permit

1625 Polk St, 94109

voluntary strentheing of exising concrete retaining wall in the rear of the bldg.

$50,000

2026-01-06

issued

otc alterations permit

1108 Stockton St, 94133

t.i. to e) retail bldg, ref to 202505217007 for structural & restrooms. new storefront w/ windows at ground/f, new finishes, plumbing, equipment & walk-in coolers, no additional area proposed, electri

$175,000

2025-11-07

issued

otc alterations permit

85 14th St, 94103

recommencement and completion of work approved under pa#201903185522

$40,000

2025-10-28

issued

otc alterations permit

1625 Polk St, 94109

add concrete footing in the basement level.