Window replacement
Foggy glass, drafts, windows that will not open. Insert and full-frame options explained, with real Denver pricing.
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What does window replacement cost in Denver?
Roughly $575 to $950 per window installed for vinyl, $850 to $1,450 for fiberglass, and $1,000 to $1,900 for wood or clad-wood. A ten-window house typically lands between about $5,000 and $19,000. We are not a window contractor. The spread between the highest and lowest bid on identical Denver window jobs is routinely 40 percent. The quote checklist lists the questions to ask, and the replacement cost guide breaks the numbers down.
What Denver windows cost, by material
| Material | Per window installed | Service life here |
|---|---|---|
| Vinyl | $575 to $950 | 15 to 25 years |
| Fiberglass | $850 to $1,450 | 25 to 40 years |
| Wood or clad-wood | $1,000 to $1,900 | 30 years plus, with maintenance |
Full-house jobs are discounted. Read the detail on our window replacement page.
Why Denver is not an average window market
Three local conditions shorten window life on the Front Range, and every one of them changes what you should buy.
- Altitude. Denver sits at 5,280 feet. A sealed glass unit assembled near sea level arrives here with more pressure inside than out, and the panes bow permanently. That stress fatigues the edge seal for the life of the window. Units built for this market use a capillary breather tube or an altitude-adjusted gas fill. Ask which one, on every quote. It is the fastest way to find out whether a company actually works here.
- Hail. The Front Range is one of the most hail-exposed corridors in the United States. Hail rarely shatters modern glass, but it dents cladding, cracks vinyl at the welds, and destroys screens, and the water arrives months later. If a storm hit your house, this is an insurance question before it is a shopping question.
- Daily temperature swings. Thirty to forty degrees between afternoon and dawn is an ordinary Denver spring day. Every swing works the frame against the glass, which is the real argument for fiberglass on large or west-facing openings: it expands at nearly the same rate as glass.
Ask this on every bid. Denver sits at 5,280 feet. Units built for this market use a capillary breather tube or an altitude-adjusted gas fill. The installation guide explains both.
Before you call
Four steps to a comparable bid
The work happens on your side of the table. The guides have the numbers.
- Read the rangeVinyl, fiberglass, and wood installed prices are on the replacement cost guide.
- Write the job downCount the openings, note the symptom on each one, and photograph each side of the house.
- Ask the altitude questionCapillary breather tube or altitude-adjusted gas fill. The answer shows whether the glass was built for 5,280 feet.
- Compare the linesPermit, trim, labour warranty, and haul-away are where bids actually differ. Then verify the licence yourself.
The desk
Front Range window guides, since 2004
Denver homeowners lose leverage in the first meeting, when the only number in the room belongs to the person who drove there. This site publishes the local range, the altitude question, and a dated directory of companies.
Services
What do you need done?
Four guides. Each one has the local numbers and the questions worth asking.
Replacement window brands
Five brands ranked on frame material, ENERGY STAR Northern-zone fit, warranty length, and published U-factor.
Window installation
New openings, additions, and basement egress windows. Includes the code numbers an inspector actually measures.
Window repair
Not every failed window needs replacing. See which symptoms are a few hundred dollars and which are not.
Window cleaning
Glass, screens, tracks and Denver's hard water spotting. Priced per pane, with the add-ons named.
Service areas
Front Range city guides
Denver, plus ten suburb guides. Each suburb page cites Census year built, NOAA climate and storm reports, and the city's own permit page.
Denver
Three markets in one city: pre-war wood sashes, mid-century steel, and post-1995 vinyl now failing on schedule. Landmark districts and basement egress covered.
Aurora
Median year built 1985. The city chart skips a permit when a replacement does not get wider.
Lakewood
Median year built 1977. NOAA's Lakewood station averages 55.8 inches of snow.
Arvada
Olde Town restoration work at one end of the city, HOA architectural review at the other.
Westminster
Median year built 1987. Same-size replacement is on the city's no-permit list.
Littleton
Median year built 1982. The city says any window replacement needs a building permit, and historic register properties need a certificate first.
Thornton
Median year built 1997. The largest decade is 2000 to 2009, and the city requires a permit to replace the window.
Englewood
Median year built 1964, the oldest in this set. NOAA logged 3.00 inch hail at Englewood on 19 June 2018.
Centennial
Median year built 1983. The city publishes a residential U-factor of 0.30 and a one-day path for non-structural window permits.
Broomfield
Median year built 2002. Windows and doors are on the city permit list, including a like-for-like replacement.
Golden
Median year built 1989. The foothills normals station is near 7,455 feet. Downtown is closer to the Lakewood station.
Boulder
Median year built 1977. The Boulder NOAA station averages 88.3 inches of snow, and landmarks need a separate certificate.
Collecting quotes
A short checklist: the range, the altitude question, the lines on a bid, and how to verify a licence.
Research first
Compare Denver window companies
Google scores from the LPR Audit public GBP table, as of 22 August 2026. Not denverwindow.com reviews, and not an endorsement. Sorted by Google score, then review count.
303 Windows
Five Seasons Windows and Doors
One Window At A Time
FAQ
Common questions
What does window replacement cost in Denver?
Roughly $575 to $950 per window installed for vinyl, $850 to $1,450 for fiberglass, and $1,000 to $1,900 for wood or clad-wood. A ten-window house typically lands between about $5,000 and $19,000. The replacement page breaks the numbers down.
Insert or full-frame replacement?
Insert, also called a pocket replacement, keeps the existing frame and sets a new unit inside it. Faster, cheaper, no exterior work, and you lose one to two inches of glass on each dimension. Full-frame strips everything back to the rough opening. More expensive, keeps the original glass area, and it is the only right answer when the frame is rotten or the sill is holding water.
What are the signs a window seal has failed?
Permanent haze or fog between the panes, a white mineral film on the inside of the glass, or visible condensation that no amount of wiping reaches. That is a failed insulated glass unit. Once the seal is gone the insulating gas is gone with it, and the window performs roughly like single glazing.
How long do replacement windows last in Colorado?
Fifteen to twenty-five years for a mid-range vinyl unit on the Front Range, which is shorter than the manufacturer's brochure suggests. Intense high-altitude ultraviolet light, daily temperature swings of thirty degrees or more, and hail all age a window faster here than in a mild coastal climate. Fiberglass and clad-wood generally outlast vinyl.
Read the replacement cost guide
Vinyl, fiberglass, and wood installed ranges for the Denver metro, with insert and full-frame explained.