Licensed Window Contractors Based in Pleasanton, California
Search below for a window contractor licensed to work in Pleasanton, CA. About 88% of Pleasanton's listings cleared a decade on their license before this page ever existed, worth weighing alongside price when you request quotes.
Licenses checked · California Contractors State License Board
3CIECC climate zone · ENERGY STAR South-Central zone
What Pleasanton's climate means for your window spec
Pleasanton sits in IECC climate zone 3C, the starting point for any code-minimum window performance here.
ENERGY STAR places Alameda County in its South-Central zone for window certification.
Normal temperatures run 48°F in January and 73°F in July, so the glass package worth paying for in Pleasanton 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 4.1 mi away.
29median years licensed
The license record behind these listings
The median window license active in Pleasanton has been on the books for 29 years.
A small slice, 1 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 Pleasanton 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.
8 window replacement contractors based in Pleasanton
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 |
|---|---|---|---|---|---|---|---|---|
| Commercial Glazing Concepts INC | Window and glass contractor | C-17 Glazing | 1066589 | Active | Jul 1, 2020 | Jul 31, 2028 | 94566 | Verify license |
| Custom Exchange Windows | Window and glass contractor | C-17 Glazing | 891012 | Active | Feb 13, 2007 | Feb 28, 2027 | 94588 | Verify license |
| Custom Exteriors INC | Window and glass contractor | B General Building / C-17 Glazing | 785361 | Active | Oct 3, 2000 | Apr 30, 2027 | 94588 | Verify license |
| D & C Glass And Aluminum INC | Window and glass contractor | C-17 Glazing | 588253 | Active | Feb 13, 1990 | Feb 29, 2028 | 94588 | Verify license |
| Debernardi Development INC | Window and glass contractor | B General Building / C-17 Glazing | 604607 | Active | Oct 12, 1990 | Apr 30, 2027 | 94566 | Verify license |
| Pleasanton Glass CO | Window and glass contractor | C-17 Glazing | 657811 | Active | Nov 2, 1992 | Nov 30, 2026 | 94566 | Verify license |
| Quality Windows & Doors INC | Window and glass contractor | C-17 Glazing | 865261 | Active | Oct 3, 2005 | Oct 31, 2027 | 94566 | Verify license |
| Team Glass INC | Window and glass contractor | C-17 Glazing | 690821 | Active | Jun 22, 1994 | Jun 30, 2028 | 94588 | 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?