License is active
Source: Contractors State License Board (CSLB)
Licensed
Current and in good standing
Bonded
$5 surety bond
Insured
Workers' comp coverage on file
Clean record
No complaints or disciplinary actions
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Y K MASON & SONS INC
Owner: YK MASON & SONS INC
- License Number
- 1001324
- State
- California
- Status
- active
- Business Type
- Corporation
- Address
- P O BOX 34246 SAN FRANCISCO, CA, 94134 San Francisco County
- Phone
- (415) 467 1788
License Dates
Issued
02/17/2015
Expires
05/31/2027
Expires in 14 months
Reissued
05/06/2019
CSLB Last Updated
05/27/2025
License Classifications
Personnel & Officers
CHOW YING KIN
Chief Executive Officer/President
CHOW ALAN WEI-LUN
Responsible Managing Officer
Contractor Bond
Amount: $5
Effective: HUDSON INSURANCE COMPANY
Cancelled: 30120417
Workers' Compensation
Carrier: Temp Agency
Policy #etc"
Effective: ACE AMERICAN INSURANCE COMPANY
Expires: C58908460
Cancelled: 06/01/2025
Suspended: 06/01/2026
CSLB designation: "Leasing Firm
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
128 Valmar Tr, 94112
add bathroom and storage room in first floor in sfd.
$34,495
2026-03-26
otc alterations permit
128 Valmar Tr, 94112
recommencement and completion of work approved under pa#202408209104
$7,500
2026-02-25
otc alterations permit
2154 Taylor St, 94133
new roof deck for unit 6 only
$30,000
2026-02-12
otc alterations permit
232 04th Av, 94118
change window in 232f: front window and kitchen window on the side. 234: change 3 windows in the front only. no size change and no change of location.
$6,000
2025-11-18
otc alterations permit
1831 40th Av, 94122
bathroom remodel on 2nd floor. changing bath tub to shower. all plumbing and electrical to remain in same location.
$28,192
2025-06-30
otc alterations permit
232 04th Av, 94118
(rear unit) kitchen remodel with updating kitchen cabinet & countertop. install new subpanel for the kitchen area electrical work. install new electrical for the kitchen. no plumbing work and mechanic
$35,000
2025-03-05
otc alterations permit
2375 31st Av, 94116
revision to pa202211176787 and 202312142510 for title 24 energy compliance.
$1
2024-02-08
otc alterations permit
880 Wisconsin St, 94107
1st fl:convert e bathroom and storage into bedrm suite (390 sf). update e interior stairs rise and tread to comply w code, install solar tube from roof to 1st fl, remove diagonal bracing in garage.
$40,000
2024-02-01
otc alterations permit
2375 31st Av, 94116
revision to pa# 202211176787, replace (e) gas tank-type water heater w/ electric, heat pump tank-type water heater, installation of heat pump, split unit, heating/cooling system for adu.
$2,000
2024-01-11
additions alterations or repairs
2375 31st Av, 94116
to comply w/nov 202288755, unit legalization under ordinance 43-14. in-fill (e) interior stairway opening.
$110,566
2023-12-04
Showing 10 of 23 permits
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