6 window replacement contractors Based in Napa
Napa has 6 window replacement contractors on active state license records. The oldest of them has held a window or glazing license since 1981, and the median listing has carried one for 25 years.
Licenses checked · California Contractors State License Board
3CIECC climate zone · ENERGY STAR South-Central zone
Climate and energy performance in Napa
Napa County sees about 26.7 inches of precipitation and 0.0 inches of snow in a normal year.
Weather at that level is one more reason the flashing and sill pan under a Napa window matter as much as the glass sitting in it.
So ask any Napa contractor how they handle both, not just which brand they carry.
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 2.4 mi away.
25median years licensed
How long Napa's window contractors have been licensed
Napa counts 6 window replacement contractors in the state's own file, with the earliest entry dating to 1981.
83% of that list cleared a decade on their license before this page ever existed.
0 are new to the file within the last two years, working the same Napa 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 Napa
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 |
|---|---|---|---|---|---|---|---|---|
| Decor Shower Door And Glass | Window and glass contractor | C-17 Glazing | 1050958 | Active | Mar 6, 2019 | Mar 31, 2027 | 94558 | Verify license |
| Innovative Glass Solutions INC | Window and glass contractor | C-17 Glazing | 975935 | Active | Aug 20, 2012 | Jul 31, 2028 | 94558 | Verify license |
| Javco Window And Glass Contractors INC | Window and glass contractor | C-17 Glazing | 408406 | Active | Jul 3, 1981 | Jul 31, 2027 | 94559 | Verify license |
| Napa Valley Glass CO INC | Window and glass contractor | C-17 Glazing | 420773 | Active | Apr 7, 1982 | Apr 30, 2028 | 94558 | Verify license |
| North Valley Glass | Window and glass contractor | C-17 Glazing | 698437 | Active | Nov 3, 1994 | Nov 30, 2026 | 94559 | Verify license |
| Webster Window & Door INC | Window and glass contractor | C-17 Glazing | 927269 | Active | Jan 12, 2009 | Jan 31, 2027 | 94558 | 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?