Window Replacement Contractors in San Leandro, CA
Window replacement contractors in San Leandro 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
Climate and energy performance in San Leandro
San Leandro 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 50°F in January and 64°F in July, so the glass package worth paying for in San Leandro 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 3.4 mi away.
28median years licensed
How long San Leandro's window contractors have been licensed
San Leandro counts 8 window replacement contractors in the state's own file, with the earliest entry dating to 1978.
75% 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 San Leandro streets as shops with decades on record.
Data: California Contractors State License Board license records, checked 2026-09-30.
8 window replacement contractors based in San Leandro
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 |
|---|---|---|---|---|---|---|---|---|
| Division 8 Resource Incorporated | Window and glass contractor | C-17 Glazing | 742533 | Active | Nov 12, 1997 | Nov 30, 2027 | 94577 | Verify license |
| Heavylux INC | Window and glass contractor | C-17 Glazing | 751278 | Active | Jul 1, 1998 | Jul 31, 2027 | 94577 | Verify license |
| Jimenez Glass | Window and glass contractor | C-17 Glazing | 1088018 | Active | Mar 3, 2022 | Mar 31, 2028 | 94577 | Verify license |
| Kasbrook INC | Window and glass contractor | C-17 Glazing | 1143568 | Active | Sep 15, 2025 | Sep 30, 2027 | 94578 | Verify license |
| Lon's Glass & Mirrors INC | Window and glass contractor | C-17 Glazing | 366062 | Active | Nov 24, 1978 | Nov 30, 2026 | 94578 | Verify license |
| Makovia Construction | Window and glass contractor | B General Building / C-17 Glazing | 970466 | Active | Feb 28, 2012 | Aug 31, 2027 | 94579 | Verify license |
| Manor Window LLC | Window and glass contractor | C-17 Glazing | 757995 | Active | Jan 13, 1999 | Aug 31, 2027 | 94577 | Verify license |
| Reyes Glass | Window and glass contractor | C-17 Glazing | 522073 | Active | Dec 23, 1987 | Feb 29, 2028 | 94579 | 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?