Licensed Window Contractors Based in Livermore, California
Window replacement contractors in Livermore range from long-standing shops to 1 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 Livermore's climate means for your window spec
Livermore 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 Livermore 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 3 mi away.
19median years licensed
The license record behind these listings
The median window license active in Livermore has been on the books for 19 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 Livermore 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.
16 window replacement contractors based in Livermore
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 |
|---|---|---|---|---|---|---|---|---|
| American Glass & Glazing | Window and glass contractor | C-17 Glazing | 1051657 | Active | Mar 25, 2019 | Mar 31, 2027 | 94551 | Verify license |
| Architectural Glass & Aluminum CO INC | Window and glass contractor | B General Building / C-17 Glazing | 313758 | Active | Dec 8, 1975 | Jun 30, 2028 | 94550 | Verify license |
| Graham Construction | Window and glass contractor | B General Building / C-17 Glazing | 910551 | Active | Feb 13, 2008 | Feb 29, 2028 | 94550 | Verify license |
| Homesite Services INC A California Corporation | Window and glass contractor | B General Building / C-17 Glazing / C-36 Plumbing | 854523 | Active | Feb 15, 2005 | Feb 28, 2027 | 94551 | Verify license |
| Jim's Glass | Window and glass contractor | C-17 Glazing | 687324 | Active | Apr 12, 1994 | Apr 30, 2028 | 94550 | Verify license |
| Livermore Glass Company | Window and glass contractor | C-17 Glazing | 720456 | Active | Mar 26, 1996 | Mar 31, 2028 | 94550 | Verify license |
| Maxx Window Works | Window and glass contractor | B General Building / C-17 Glazing | 921271 | Active | Aug 26, 2008 | Jul 31, 2027 | 94551 | Verify license |
| Metz Glazing Services | Window and glass contractor | C-17 Glazing | 908453 | Active | Dec 26, 2007 | Dec 31, 2027 | 94551 | Verify license |
| Paramount Glass LLC | Window and glass contractor | C-17 Glazing | 1079246 | Active | Aug 5, 2021 | Aug 31, 2027 | 94551 | Verify license |
| Premium Glass | Window and glass contractor | C-17 Glazing | 852399 | Active | Jan 8, 2005 | Dec 31, 2027 | 94551 | Verify license |
| Premium Glass CO INC | Window and glass contractor | C-17 Glazing | 1011941 | Active | Mar 9, 2016 | Mar 31, 2028 | 94551 | Verify license |
| Ron's Window Center | Window and glass contractor | B General Building / C-17 Glazing | 943882 | Active | Feb 25, 2010 | Feb 29, 2028 | 94551 | Verify license |
| Smart Energy Upgrade CO | Window and glass contractor | B General Building / C-17 Glazing | 405505 | Active | May 7, 1981 | May 31, 2027 | 94551 | Verify license |
| U S G A INC | Window and glass contractor | C-17 Glazing | 883104 | Active | Aug 22, 2006 | Jul 31, 2028 | 94551 | Verify license |
| Westpac Glass | Window and glass contractor | C-17 Glazing | 714776 | Active | Nov 3, 1995 | Nov 30, 2027 | 94550 | Verify license |
| Whitelaw Glass And Aluminum | Window and glass contractor | C-17 Glazing | 1132016 | Active | Jan 23, 2025 | Jan 31, 2027 | 94550 | 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?