Licensed Window Contractors Based in San Mateo, California
Window replacement contractors in San Mateo range from long-standing shops to 0 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 San Mateo's climate means for your window spec
San Mateo 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 San Mateo 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 5.1 mi away.
24median years licensed
The license record behind these listings
The median window license active in San Mateo has been on the books for 24 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 San Mateo 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.
Window contractors licensed to work in San Mateo, CA
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 |
|---|---|---|---|---|---|---|---|---|
| Deluxe Windows And Clean Builders | Window and glass contractor | B General Building / C-17 Glazing | 695262 | Active | Aug 26, 1994 | Sep 30, 2027 | 94403 | Verify license |
| First Glass CO | Window and glass contractor | C-17 Glazing | 996339 | Active | Aug 30, 2014 | Aug 31, 2028 | 94401 | Verify license |
| Glass Express | Window and glass contractor | C-17 Glazing | 816338 | Active | Jan 9, 2003 | Jan 31, 2027 | 94401 | Verify license |
| Pace Glass CO | Window and glass contractor | C-17 Glazing | 553454 | Active | Jan 11, 1989 | Jan 31, 2027 | 94401 | Verify license |
| Post & Lintel INC | Window and glass contractor | B General Building / C-17 Glazing | 1027032 | Active | May 18, 2017 | May 31, 2027 | 94403 | 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?