Top-Rated Window Replacement Companies in Northglenn, CO
We don't have license data for window and glazing businesses in Northglenn, CO the way we do for some other cities on this site. This page leans on Google Maps instead: 7 businesses, ranked by rating weighted against how many people reviewed them. A strong Google rating still isn't the same thing as a license on file, so ask to see one before you sign anything.
Google Maps ratings checked · How we rank
5BIECC climate zone · ENERGY STAR Northern zone
What Northglenn's climate means for your window spec
Adams County sees about 14.5 inches of precipitation and 44.8 inches of snow in a normal year.
Weather at that level is one more reason the flashing and sill pan under a Northglenn window matter as much as the glass sitting in it.
So ask any Northglenn 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 1.9 mi away.
7 top-rated window replacement companies in and near Northglenn
Ranked by Google rating weighted against how many people left one, so a perfect score from a handful of reviewers never outranks a strong average built on hundreds. That ranking is not a license check; call the state directly and ask for the contractor's license or registration number.
| Rank | Business | Google rating | Reviews | Category | Area | Google Maps listing |
|---|---|---|---|---|---|---|
| 1 | Greenlight Fencing and Windows | 117 | Window installation service | Northglenn 80234 | Google reviews | |
| 2 | Egress, Inc. | 136 | Window installation service | Denver 80260 | Google reviews | |
| 3 | Performance Windows Denver | 453 | Window installation service | Broomfield 80020 | Google reviews | |
| 4 | KV Windows Inc. | 115 | Window installation service | Westminster 80030 | Google reviews | |
| 5 | WINDOW WELL GUARDIAN | 32 | Window installation service | Northglenn 80234 | Google reviews | |
| 6 | On The Spot Window & Door Services | 23 | Window installation service | Thornton 80602 | Google reviews | |
| 7 | Window World of Denver | 518 | Window installation service | Denver 80229 | Google reviews |
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?