SF Twin Boys CORP. DBA Master Builders
SF Twin Boys CORP. DBA Master Builders is a California corporation based in San Francisco (San Francisco County) with contractor license #850407 (A, B), first issued in 2004. CSLB status on Nov 9, 2026: Active, no violations. From Jan 1, 2025 to Nov 8, 2026, building departments recorded 8 permits under this name, 2 of them home projects (kitchen & bath). 62% of them were finaled by the city inspector. The median declared job value is $5,000. Most of the work was in 94133 · North Beach / Russian Hill. The latest permit is from Nov 4, 2026. The license lists a contractor bond and workers' compensation coverage.
Business phone (CSLB)
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License
| License # | 850407 |
|---|---|
| Status | Active, no violations |
| Classes | A, B |
| Business type | corporation |
| Issued / Expires | Nov 30, 2004 / Nov 30, 2028 |
| Contractor bond | Yes |
| Workers' comp | Yes, on file |
| Based in | San Francisco, San Francisco County |
Recent permits
| Date | Work | Area | Declared value | Status |
|---|---|---|---|---|
| Nov 4, 2026 | Other permits | 94133 · North Beach / Russian Hill | – | Issued |
| Nov 4, 2026 | Other permits | 94133 · North Beach / Russian Hill | – | Issued |
| May 21, 2026 | HVAC, plumbing & electrical | 94133 · North Beach / Russian Hill | $100 | Finaled |
| Mar 10, 2026 | Kitchen & bath remodel | 94133 · North Beach / Russian Hill | $128,888 | Finaled |
| Feb 13, 2026 | Kitchen & bath remodel | 94133 · North Beach / Russian Hill | $75,000 | Issued |
| Oct 14, 2025 | Other permits | 94131 · Noe Valley / Glen Park | $5,000 | Finaled |
| Aug 25, 2025 | Other permits | 94112 · Excelsior / Outer Mission | $5,000 | Finaled |
| May 7, 2025 | Other permits | 94109 · Russian Hill / Nob Hill | $5,000 | Finaled |
Street addresses of homeowners are never shown.
Work on permits
Where they work
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