Licensed Window Contractors Based in Walnut Creek, California
Walnut Creek has 6 window replacement contractors on active state license records. The oldest of them has held a window or glazing license since 2005, and the median listing has carried one for 8.1 years.
Licenses checked · California Contractors State License Board
3BIECC climate zone · ENERGY STAR South-Central zone
Climate and energy performance in Walnut Creek
San Francisco-Oakland-Fremont, CA piles up about 2,029 heating degree days in a normal year, against 1,084 on the cooling side of the ledger.
That's the load an ENERGY STAR-rated window in the South-Central zone is built to handle.
A contractor pulled from Walnut Creek's license record should be able to name the right U-factor for zone 3B before they ever measure an opening.
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 5.8 mi away.
8.1median years licensed
How long Walnut Creek's window contractors have been licensed
Walnut Creek counts 6 window replacement contractors in the state's own file, with the earliest entry dating to 2005.
50% of that list cleared a decade on their license before this page ever existed.
1 are new to the file within the last two years, working the same Walnut Creek streets as shops with decades on record.
Data: California Contractors State License Board license records, checked 2026-09-30.
6 window replacement contractors based in Walnut Creek
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 |
|---|---|---|---|---|---|---|---|---|
| Best Offer Glass | Window and glass contractor | C-17 Glazing | 1106427 | Active | Jun 23, 2023 | Jun 30, 2027 | 94595 | Verify license |
| Fair Glass | Window and glass contractor | C-17 Glazing | 1150998 | Active | Feb 25, 2026 | Feb 29, 2028 | 94597 | Verify license |
| Nicky Dineen Construction | Window and glass contractor | B General Building / C-17 Glazing | 993712 | Active | Jun 14, 2014 | Jun 30, 2028 | 94598 | Verify license |
| R M Construction | Window and glass contractor | B General Building / C-17 Glazing | 862689 | Active | Aug 10, 2005 | Aug 31, 2027 | 94598 | Verify license |
| Valley Glass | Window and glass contractor | C-17 Glazing | 990128 | Active | Jan 24, 2014 | Jan 31, 2028 | 94595 | Verify license |
| Windows 4 U | Window and glass contractor | C-17 Glazing | 1097508 | Active | Oct 7, 2022 | Dec 31, 2026 | 94597 | 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?