MASTER BUILDERS
A| B — SAN FRANCISCO, California
DBA: S F TWIN BOYS CORPORATION
Record looks clean.
Active A| B contractor license in California, issued 2004. No open issues on file as of the retrieval date. Covers A| B in SAN FRANCISCO.
- Active through 11/30/2026
- Bonded $25000
- WC on file
- No complaints
California state licensing board · retrieved 09/02/2025
The record
License
- Number
- 850407
- Status
- active
- Issued
- 11/30/2004
- Expires
- 11/30/2026
Coverage
- Contractor bond
- $25,000
- Bond company
- AMERICAN CONTRACTORS INDEMNITY COMPANY
- Workers comp
- SECURITY NATIONAL INSURANCE COMPANY
- Wage bond
- $0
Business
- Owner
- Is this you? →
- County
- San Francisco
History
- Complaints (3 yrs)
- 0
- Disciplinary
- None on file
- Permits on file
- 7
- Pending actions
- None
Licensed to do
- A| B — A| B
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Claim this profile →Disciplinary & complaints
No disciplinary actions on file.
Building permits (7)
Source: LA City Open Data (LADBS)
otc alterations permit
348 Chestnut St, 94133
1st flr: convert (e) kitchen to masterbedroom w/full bath. relocate kitchen to living room. relocate half bath and narrow (e) interior stair from 45" to 36" & build counter above. lower flr: add full
$128,888
2026-03-10
issued
otc alterations permit
1 Stark St, 94133
back unit: all interior work, all in kind replacement, no structural work. remodel kitchen and 3 baths. replace 9 interior doors, 5 windows (rear, not street visible), patch repair smooth walls and ce
$75,000
2026-02-13
issued
additions alterations or repairs
642 Lombard St, 94133
rear bldg: add 2 adu, local adu program per planning code section 207.1 exterior work includes new egress stair and landing at center of lot and replacement of front gate. response to complaint 202422
$188,622
2025-12-31
issued
otc alterations permit
2112 Castro St, 94131
replace foundation at middle of the garage. total 18' long.
$5,000
2025-10-14
complete
otc alterations permit
647 Athens St, 94112
replace damaged siding west (rear) property 8'x20' linear ft in kind. remove non-structural concrete curb adjacent to the rear wall approx. 5"x5", 20 linear ft. replace damaged rear property siding ea
$5,000
2025-08-25
complete
otc alterations permit
4 Montclair Tr, 94109
1) bolt (e) mudsill (exposed) 32" oc , 6" from edge, 5/8", 3" washer, 6" penetration. strap post beam connection lower room and below garage bolt garage perimeter and north and west lower main house.
$5,000
2025-05-07
complete
otc alterations permit
1845 Grant Av, 94133
to obtain final inspection for work approved under pa# 201906214079. all work is complete.
$1
2024-09-19
complete
Status history
- Last updated
- 09/02/2025
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Official record
Source of record: Contractors State License Board (CSLB). Raw record ID: #850407
California state licensing board · retrieved 09/02/2025