ENRUES

J Gerstenkorn Builders

J Gerstenkorn Builders is a California corporation based in South San Francisco (San Mateo County) with contractor license #1064688 (B), first issued in 2020. CSLB status on Nov 9, 2026: Active, no violations. From Jan 1, 2025 to Nov 8, 2026, building departments recorded 2 permits under this name. The latest permit is from Jul 21, 2025. The license lists a contractor bond and workers' compensation coverage.

2permits 2025–26
0home-project permits
6years licensed
Jul 21, 2025latest permit

(415) 405-6716

Business phone (CSLB)

Verify on CSLB ↗Google reviews ↗

Before you sign, confirm the license is still active on the CSLB site, get a written contract and ask for the permit number for your job.

Is this your business? You can ask us to correct or remove this profile. hello@permitproven.com

License

License #1064688
StatusActive, no violations
ClassesB
Business typecorporation
Issued / ExpiresMar 25, 2020 / Mar 31, 2028
Contractor bondYes
Workers' compYes, on file
Based inSouth San Francisco, San Mateo County

Recent permits

DateWorkAreaDeclared valueStatus
Jul 21, 2025HVAC, plumbing & electrical94107 · Potrero Hill / South of Market–Finaled
Jul 15, 2025Other permits94107 · Potrero Hill / South of Market$1,000Finaled

Street addresses of homeowners are never shown.

Work on permits

HVAC, plumbing & electrical · 1 permit Other permits · 1 permit

Where they work

94107 · Potrero Hill / South of Market · 2 permits

Similar contractors in South San Francisco