9 window replacement contractors Based in South San Francisco
Window replacement contractors in South San Francisco range from long-standing shops to 2 newer entrants licensed in the last two years. Every name below comes from the California license record, not a paid submission.
Licenses checked · California Contractors State License Board
3CIECC climate zone · ENERGY STAR South-Central zone
What South San Francisco's climate means for your window spec
South San Francisco sits in IECC climate zone 3C, the starting point for any code-minimum window performance here.
ENERGY STAR places San Mateo County in its South-Central zone for window certification.
Normal temperatures run 51°F in January and 64°F in July, so the glass package worth paying for in South San Francisco isn't the same one that pencils out two zones over.
Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 2.5 mi away.
17median years licensed
The license record behind these listings
The median window license active in South San Francisco has been on the books for 17 years.
A small slice, 0 of them, sit inside a 90-day window for renewal as of our last check, which is ordinary license-cycle timing rather than a mark against the business.
Match the number on any South San Francisco listing here against California's own lookup before you pick up the phone.
Data: California Contractors State License Board license records, checked 2026-09-30.
9 window replacement contractors based in South San Francisco
Listed A to Z by business name. No listed business paid for placement or position.
| Business | Category | License class | License no. | Status | Effective | Expires | ZIP | Official record |
|---|---|---|---|---|---|---|---|---|
| Alexander Builders INC | Window and glass contractor | B General Building / C-17 Glazing | 866157 | Active | Oct 20, 2005 | Oct 31, 2027 | 94080 | Verify license |
| American Home Renewal INC | Window and glass contractor | B General Building / C-17 Glazing | 740587 | Active | Sep 18, 1997 | Sep 30, 2027 | 94080 | Verify license |
| Apa Glazing INC | Window and glass contractor | C-17 Glazing | 1161798 | Active | Sep 24, 2026 | Sep 30, 2028 | 94080 | Verify license |
| Core Glass & Aluminum INC | Window and glass contractor | C-17 Glazing | 924066 | Active | Oct 23, 2008 | Jul 31, 2027 | 94080 | Verify license |
| Flynn Glass & Sash | Window and glass contractor | B General Building / C-17 Glazing | 548006 | Active | Nov 15, 1988 | Nov 30, 2027 | 94080 | Verify license |
| HC Glass INC | Window and glass contractor | C-17 Glazing | 1151016 | Active | Feb 25, 2026 | Feb 29, 2028 | 94080 | Verify license |
| Jest Glass | Window and glass contractor | C-17 Glazing | 1052948 | Active | Apr 29, 2019 | Apr 30, 2027 | 94080 | Verify license |
| Medallion Glass & Shower Doors | Window and glass contractor | C-17 Glazing | 1053356 | Active | May 9, 2019 | May 31, 2027 | 94080 | Verify license |
| South City Shower Door And Window Works INC | Window and glass contractor | C-17 Glazing | 937792 | Active | Sep 15, 2009 | Sep 30, 2027 | 94080 | Verify license |
Questions to ask before you sign
- How long have you held your state license, and can I see the number?
- Is this a full-frame replacement or an insert into my existing frame, and why that one?
- Who pulls the permit, and does this change trigger an egress check on a bedroom window?
- What flashing and sill pan will you use, and in what order do you install them?
- If my home was built before 1978, is your crew lead-safe certified for this job?
- What's the completion date in writing, and what happens if the schedule slips?