Replacement Windows — Westminster, CO 80030, 80031 & 80234
Window Replacement in Westminster, CO
Vinyl, fiberglass and wood-clad replacement windows priced per window, with glass chosen for US-36 noise and an egress check on every bedroom before anything is ordered.
How much are replacement windows in Westminster, CO, and who installs them?
Northern Lights Exteriors, a Pella Certified Contractor working the Front Range since 2001, installs replacement windows in Westminster for about $1,000–$1,200 per window (vinyl), $1,800–$2,000 (fiberglass) and $2,000+ (wood-clad), installed. Rated 4.9 out of 5 from 552 verified reviews.
Every bedroom opening gets a 2021 IRC egress check at the measure, and every quote lists the NFRC U-factor and SHGC for each unit.
Window Replacement Cost in Westminster, CO
Replacement windows in Westminster cost about $1,000–$1,200 per window for vinyl, $1,800–$2,000 per window for fiberglass, and $2,000 and up per window for wood-clad, installed (Northern Lights Exteriors pricing, 2026). The final price comes from an on-site measure in united inches, the installation method and the glass package.
| Frame material | Installed price per window | Best fit |
|---|---|---|
| Vinyl | $1,000–$1,200 | Value replacements on rentals and 1970s–90s homes. |
| Fiberglass | $1,800–$2,000 | Best match for Front Range temperature swing; slim, strong frames. |
| Wood-clad | $2,000+ | Wood interior with a low-maintenance exterior; older or higher-end homes. |
Ranges online, exact numbers on site: an online figure cannot see a rotted sill, an enlarged egress opening or a full-frame tear-out. Our window replacement cost guide explains the rest, and financing is available. Local utility rebates sometimes apply to qualifying energy-efficient units; ask at the measure.
More Westminster pages: James Hardie siding in Westminster · Westminster siding contractors · Westminster roofing · Westminster deck builders · Westminster commercial and HOA work · the Westminster exterior remodeling hub.
US-36, Federal Boulevard and Sheridan: Quieter Windows for Westminster
Westminster is cut through by US-36, with Federal Boulevard, Sheridan Boulevard and 92nd and 120th Avenues carrying heavy traffic. For homes near those corridors, noise is often the main reason to replace windows, ahead of energy.
A third pane does surprisingly little for traffic noise. What works is laminated glass or dual panes of different thickness, which break up the frequencies that carry, plus a full-frame installation sealed with low-expansion foam so sound does not leak around the unit.
Laminated glass
The biggest single improvement for road noise, and it holds together in hail.
Mixed-thickness dual pane
Cheaper than laminated, and better for sound than triple pane.
Low-SHGC on the south and west
Westminster’s sun at 5,384 feet makes a west room unusable on an August afternoon without it.
Warm-edge spacer
Stops condensation at the edge of the glass on a −1°F design morning.
Egress, Permits and Westminster’s Older Bedrooms
Westminster enforces the 2021 International Residential Code, in effect since June 1, 2024. Two rules matter for window replacement in Westminster:
- Enlarging an opening needs a permit. The city lists “increasing wall opening for window” as a Residential Building permit. That comes up most often when a basement or bedroom window has to meet egress.
- Bedroom egress. Under the 2021 IRC a sleeping-room window needs a net clear opening of at least 5.7 sq ft (5.0 sq ft at grade floor), at least 24 inches clear height and 20 inches clear width, with the sill no more than 44 inches above the floor. A thicker modern frame in an old rough opening can shrink the clear opening below that, so we check every bedroom at the measure, before anything is ordered.
| Egress requirement (2021 IRC) | Minimum / maximum |
|---|---|
| Net clear opening | 5.7 sq ft (5.0 sq ft at grade floor) |
| Clear opening height | 24 in minimum |
| Clear opening width | 20 in minimum |
| Sill height above floor | 44 in maximum |
Whether a same-size replacement needs a permit at your address is a question we confirm with the City of Westminster Building Division at 4800 W. 92nd Avenue (303-658-2075) for each job.
Choosing Among Window Companies in Westminster
Northern Lights Exteriors is a Pella Certified Contractor and installs vinyl, fiberglass and wood-clad windows in Westminster. As a window company that also does siding and roofing, we can replace windows during a re-side, which is the cheapest time to do full-frame window installation in Westminster, because the trim and flashing are already off.
When you compare window companies in Westminster, ask each one three things: Is the price per window installed, or per unit before labor? Is it a pocket insert or a full-frame install? And who checks bedroom egress before ordering? Our guide to comparing window installers lists the rest.
- Measure every opening and check egress.
- Written quote with the NFRC U-factor and SHGC for each unit.
- Order, with any enlarged openings permitted.
- Install, usually one to two days for a whole house.
- Walkthrough, with warranty and NFRC documents in your portal.
Windows replacement services in Westminster also include patio doors and egress enlargement. See window types and styles and Pella windows.
The System Behind the Work
A window order is a list of 15 or 20 openings, each with its own size, egress check, glass package and NFRC label. You can see that list, the order status and the install date in one place, instead of phoning to ask.
Two things make that possible, and they are the reason to choose us over a cheaper quote.
First, experience and scope. We have been working on Colorado’s Front Range since 2001, and we hold a Class C general contractor license (Colorado license #C120350) rather than a single-trade license. That is not a technicality: it means roofing, siding, windows, decks and outdoor living can run under one contract, with one project manager accountable for the flashings where those trades meet — which is precisely where multi-contractor projects leak, literally and figuratively. James Hardie has recognized us as an Elite Contractor continuously since 2011, and as a President’s Club Member — their highest contractor distinction nationwide. Our rating is 4.9 out of 5 from 552 verified reviews.
Second, a proprietary on-demand client portal we built ourselves. Most of what people hate about a remodel is not the construction. It is not knowing — who to call, whether the permit went in, when material arrives, what has been paid, whether it passed inspection. We built a system to remove exactly that, and as far as we know no other exterior contractor in this market offers it:
Every conversation in one place
Messages, decisions and change requests are logged against your project rather than scattered across texts, voicemails and three different crew members’ phones.
Contracts and scope, always retrievable
Your signed contract and itemized scope live in the portal, so you can easily get a refresh on what was agreed — on your own, any time.
Permit status you can see
Where the permit is in the process, and when inspections are scheduled — without having to phone anyone to find out.
Delivery and install schedules
When material lands and when each trade starts, so you can plan around the work instead of waiting for a truck to appear.
Before, during and final photography
Documented condition before we start, progress images through production, and final photography — including the parts of the building you will never see again once it is closed up.
Payments tracked per trade
What is paid and what is outstanding, broken out by trade rather than as one running balance you have to reconcile yourself.
Inspection records
Each inspection and its result, recorded against the project and available when you sell the house and someone asks.
Access is an individual, custom URL issued to you — and you get it when we start talking, at the lead and project meeting, not after you sign something. That is deliberate: you can see how we run a project before you commit to one. It then stays available after the work is finished, which matters more than it sounds, because the documentation, images and inspection records are exactly what a buyer’s agent, an appraiser or an insurer asks for years later.
Nearby Cities We Also Serve
Westminster sits between Broomfield, Thornton, Northglenn and Arvada, and we work all of them. If you are just over the city line, start here instead:
Related window guides
Recent Westminster Window Projects
Recent window replacements by Northern Lights Exteriors in Westminster, CO: Simonton and Anlin vinyl and Pella Impervia fiberglass. Each caption says what was installed and in which ZIP.
Westminster Window Replacement FAQs
How much does window replacement cost in Westminster, CO?
About $1,000 to $1,200 per window for vinyl, $1,800 to $2,000 per window for fiberglass, and $2,000 and up per window for wood-clad, installed (Northern Lights Exteriors, 2026). The final price comes from an on-site measure.
What windows are best for a Westminster home?
Fiberglass handles the Front Range’s daily temperature swing best. Vinyl is the value choice, and wood-clad suits older or higher-end homes. Near US-36 or Federal Boulevard, add laminated or mixed-thickness glass for noise.
Do I need a permit to replace windows in Westminster?
Enlarging a wall opening for a window needs a Residential Building permit from the City of Westminster. For a same-size replacement we confirm with the city’s Building Division for each job, and we pull any permit needed.
Will new windows reduce US-36 traffic noise?
Yes, if the glass is chosen for sound. Laminated glass or dual panes of different thickness reduce road noise far more than a third pane, and a full-frame install sealed with low-expansion foam stops sound leaking around the frame.
What is the egress requirement for a bedroom window?
Under the 2021 IRC, which Westminster enforces: at least 5.7 sq ft net clear opening (5.0 at grade floor), 24 inches clear height, 20 inches clear width, and a sill no higher than 44 inches. We check every bedroom at the measure.
Are you a Pella dealer in Westminster?
We are a Pella Certified Contractor, and we also install other vinyl, fiberglass and wood-clad lines depending on the opening and budget.
