6 window replacement contractors Based in Lorton
Search below for a window contractor licensed to work in Lorton, VA. About 33% of Lorton's listings cleared a decade on their license before this page ever existed, worth weighing alongside price when you request quotes.
Licenses checked · Virginia Department of Professional and Occupational Regulation, Board for Contractors
4AIECC climate zone · ENERGY STAR North-Central zone
What Lorton's climate means for your window spec
Washington-Arlington-Alexandria, DC-VA-MD-WV piles up about 4,931 heating degree days in a normal year, against 964 on the cooling side of the ledger.
That's the load an ENERGY STAR-rated window in the North-Central zone is built to handle.
A contractor pulled from Lorton's license record should be able to name the right U-factor for zone 4A 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 13.9 mi away.
7.7median years licensed
The license record behind these listings
The median window license active in Lorton has been on the books for 7.7 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 Lorton listing here against Virginia's own lookup before you pick up the phone.
Data: Virginia Department of Professional and Occupational Regulation, Board for Contractors license records, checked 2026-09-30.
Window contractors licensed to work in Lorton, VA
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 |
|---|---|---|---|---|---|---|---|---|
| Advanced Glass Expert LLC | Window and glass contractor | Class A – Glass and Glazing Contracting (GLZ) | 163869 | Active | Mar 7, 2018 | Jun 30, 2027 | 22079 | Verify license |
| Glazing Contractors Of Virginia INC | Window and glass contractor | Class A – Glass and Glazing Contracting (GLZ) | 173758 | Active | Dec 3, 2019 | Dec 31, 2027 | 22079 | Verify license |
| Liberty Glass Doors And Windows LLC | Window and glass contractor | Class A – Commercial Improvement Contracting (CIC) | 189557 | Active | Dec 6, 2023 | Dec 31, 2027 | 22079 | Verify license |
| Merit Commercial Windows LLC | Window and glass contractor | Class A – Commercial Improvement Contracting (CIC) | 147259 | Active | Jul 16, 2012 | Jul 31, 2028 | 22079 | Verify license |
| Vinyl-Lite Windows Products INC | Window and glass contractor | Class A – Residential Building Contracting (RBC) / Commercial Building Contracting (CBC) | 019119 | Active | Oct 10, 1979 | Dec 31, 2026 | 22079 | Verify license |
| Window Nation LLC | Window and glass contractor | Class A – Home Improvement Contracting (HIC) | 178069 | Active | May 28, 2021 | May 31, 2027 | 22079 | 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?