Licensed Window Contractors Based in Renton, Washington
Renton has 9 window replacement contractors on active state license records. The oldest of them has held a window or glazing license since 1982, and the median listing has carried one for 4.2 years.
Licenses checked · Washington State Department of Labor & Industries
4CIECC climate zone · ENERGY STAR Northern zone
Climate and energy performance in Renton
Weather at that level is one more reason the flashing and sill pan under a Renton window matter as much as the glass sitting in it.
So ask any Renton 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 1.3 mi away.
4.2median years licensed
How long Renton's window contractors have been licensed
Renton counts 9 window replacement contractors in the state's own file, with the earliest entry dating to 1982.
33% of that list cleared a decade on their license before this page ever existed.
4 are new to the file within the last two years, working the same Renton streets as shops with decades on record.
Data: Washington State Department of Labor & Industries license records, checked 2026-09-30.
Window contractors licensed to work in Renton, WA
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 |
|---|---|---|---|---|---|---|---|---|
| Acinstalls LLC | Window and glass contractor | Glazing/Glass | ACINSL*745BZ | Active | Jan 9, 2026 | Jan 9, 2028 | 98055 | Verify license |
| Advanced Tint LLC | Window and glass contractor | Glazing/Glass | ADVANTL788LM | Active | Jul 12, 2022 | Sep 26, 2028 | 98059 | Verify license |
| Badger's Gutter/Window CLNG | Window and glass contractor | Gutters/Downspouts | BADGEGW829RM | Active | Dec 14, 2018 | Dec 15, 2026 | 98058 | Verify license |
| Cecily Westall Glass | Window and glass contractor | Glazing/Glass | CECILWG750PC | Active | Oct 3, 2025 | Oct 3, 2027 | 98057 | Verify license |
| Metro Glass CO INC | Window and glass contractor | Glazing/Glass | METROGC184MW | Active | Jul 16, 1982 | Mar 6, 2027 | 98057 | Verify license |
| NW Window & Gutter | Window and glass contractor | General | NWWINWG750KK | Active | May 17, 2025 | May 17, 2027 | 98059 | Verify license |
| Savage Securities INC | Window and glass contractor | Glazing/Glass | SAVAGS*740J4 | Active | Apr 24, 2026 | Apr 24, 2028 | 98057 | Verify license |
| Sound Window & Door INC | Window and glass contractor | General | SOUNDWD033CM | Active | Feb 14, 1997 | Jun 29, 2028 | 98057 | Verify license |
| U Factor Window & Door Sales | Window and glass contractor | General | UFACTFW845BK | Active | Jan 12, 2016 | Apr 5, 2028 | 98057 | 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?