Local research · updated July 2026
Replacement Windows in Denver, Colorado
Denver is hard on windows from two directions at once: a mile-high sun that cooks south-facing frames and fades interiors, and one of the most active hail corridors in the country. Add a housing stock where most homes went up before 1980 — many still carrying original single-pane aluminum sliders — and window replacement here is less a cosmetic upgrade than deferred maintenance coming due.
Short answer
In Denver, a standard replacement window (double-hung, casement or slider) typically costs $590–$3,370 installed. Bay and bow windows run $2,960–$9,475+, and a sliding patio door $1,775–$5,920. Frame material and the glass package decide where a project lands in that range.
Planning ranges built from NREL and BLS cost data, localized to Denver with the BEA Regional Price Parity for Denver-Aurora-Centennial, CO (2024). How we estimate →
57.4%
of Denver homes were built before 1980, the era of single-pane and early aluminum windows
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
1974
median year built across Denver's 352,593 housing units
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
U ≤ 0.22
the ENERGY STAR v7.0 number that matters most in the Northern zone
Source: EPA ENERGY STAR v7.0
Window installers in Denver
Compare companies serving Denver. Request a free, no-obligation quote and we route it to the company or a vetted local installer.
| Company | Location | Request a quote |
|---|---|---|
 4.8 · 200,000+ reviews | Denver, CO | Get a quote → |
| 1Champion Replacement Windows of DenverChampion | Denver, CO | Get matched → |
| 2Champion Windows & Home Exteriors of DenverChampion | Denver, CO | Get matched → |
| 3Pella Windows & Doors of Northern ColoradoPella | Denver, CO | Get matched → |
| 4Pella Windows and Doors of Greenwood VillagePella | Greenwood Village, CO | Get matched → |
| 5Pella Windows and Doors Showroom of Denver, COPella | Denver, CO | Get matched → |
| 6Pella Windows and Doors Showroom of Greenwood Village, COPella | Greenwood Village, CO | Get matched → |
| 7Power Home RemodelingPower Home Remodeling | Centennial, CO | Get matched → |
| 8Universal Windows Direct of DenverUniversal Windows Direct | Denver, CO | Get matched → |
| 9Wallaby Windows and Siding of DenverWallaby Windows | Denver, CO | Get matched → |
| 10Window NationWindow Nation | Aurora, CO | Get matched → |
| 11Window World of DenverWindow World | Denver, CO | Get matched → |
| 12Zen Windows DenverZen Windows | Aurora, CO | Get matched → |
›Show 12 more local companies near Denver
| Colorado Sunroom And Window Distributors | Denver, CO | Get matched → |
| Discount Windows & Siding, INC | Denver, CO | Get matched → |
| Gravina's Window Center of Littleton | Denver, CO | Get matched → |
| Kraftwork Design Windows & Siding | Denver, CO | Get matched → |
| Milgard Windows & Doors | Denver, CO | Get matched → |
| Mountain View Window & Door | Denver, CO | Get matched → |
| Reflection Windows & Doors | Denver, CO | Get matched → |
| Remodeling City Side | Denver, CO | Get matched → |
| Road Home Exteriors | Denver, CO | Get matched → |
| Sierra Pacific Windows | Denver, CO | Get matched → |
| Veteran Windows and Doors | Denver, CO | Get matched → |
| Window Replacement Denver | Denver, CO | Get matched → |
Renewal by Andersen Window Replacement
4.8 · 200,000+ reviewsShowrooms in Denver & Longmont · serving the Denver metro
Full-service manufacturer and installer, transferable warranty, local crews. Why it's our Top Pick
Get a quote →6Pella Windows and Doors Showroom of Greenwood Village, CO
Greenwood Village, CO · Pella
Get matched →›Show 12 more local companies
Listings compiled from manufacturer dealer locators and public business records. Premier and Sponsored Partners pay for placement and are labeled as such; star ratings shown are reported by the partner, with the source and date beside them. See our advertising disclosure. Contacting a company shares your details with it (or a vetted local installer) so it can reach you about your project.
Are you a window company? Claim your listing to take quote requests from Denver homeowners directly.
What drives window decisions in Denver
- High-altitude UV exposure degrades vinyl frames and glazing seals faster than at sea level; fiberglass and composite frames hold up better.
- The Front Range sits in "hail alley" — impact-resistant glass and hail-rated frames are a legitimate consideration, not an upsell.
- Big day-night temperature swings stress insulated glass seals; failed (fogged) double panes are one of the most common local replacement triggers.
- Denver enforces its own building code based on recent IECC editions, and permitted replacements must meet Northern-zone efficiency numbers.
Replacement windows & doors by type in Denver
Local cost ranges and Northern-zone efficiency guidance for each window and door style, specific to Denver homes:
Ranges localized to Denver's cost level: national planning ranges shifted by the BEA Regional Price Parity for Denver-Aurora-Centennial, CO (105.8, U.S. = 100; 2024). How we estimate local costs →
Efficiency requirements for Denver's climate
Denver sits in the ENERGY STAR Northern zone (IECC zone 5B (cold, dry), Denver County). Under the v7.0 specification, qualifying windows need a U-factor of 0.22 or lower with a solar heat gain coefficient (SHGC) of at least 0.17. Heating-dominated climate: the window must hold heat in (very low U-factor) while still letting some free solar warmth through in winter (minimum SHGC). Equivalent-performance tradeoffs allow U-factors of 0.23–0.26 when paired with progressively higher solar gain.
Not sure what these numbers mean? Read our plain-English guide to U-factor and SHGC.
What replacement windows cost here
Labor rates in metro Denver run above the national average, and many pre-1980 homes need full-frame replacement (not cheaper insert installs) where original frames are out of square or rot-damaged. High-performance glass packages that clear the Northern-zone U-factor bar add cost up front but qualify for utility efficiency programs and cut winter heating loads.
For a breakdown by frame material and install type, see our full cost guide.
Rebates & incentives in Colorado
The federal window tax credit (25C) ended for projects placed in service after December 31, 2025. If your windows were installed in 2025, you can still claim it on your 2025 return — but for new projects there is no federal window credit. State and utility programs are now the main source of window incentives.
Colorado runs live IRA Home Energy Rebate programs; whole-home efficiency retrofits (HOMES pathway) can include window replacement when part of a modeled energy-savings project.
- Xcel Energy insulation & air sealing rebates. Xcel Colorado offers home efficiency rebates; window projects qualify indirectly when bundled with a home energy audit and envelope work. (Xcel Energy CO program pages)
- Denver Climate Action Rebates. The City of Denver has run its own climate rebate rounds for home electrification and efficiency upgrades; funding rounds vary by year. (City & County of Denver Climate Action office)
Colorado is a home-rule state: Denver enforces the Denver Building Code based on recent IECC editions; requirements can exceed the state baseline.
Replacement windows in nearby metros
Not in Denver proper? These nearby markets carry the same local research: housing-age data, climate-zone specs, and current rebate status for each city:
Denver window replacement FAQ
›Do I need a permit to replace windows in Denver?
Yes — like-for-like window replacement in Denver generally requires a permit through Community Planning and Development, and the new windows must meet the current energy code (Northern-zone U-factor requirements). Reputable installers pull the permit for you; be wary of any bid that treats skipping the permit as a discount.
›Are impact-resistant windows worth it in Denver?
If you are in a neighborhood that has taken hail losses — most of the metro has — impact-rated or laminated glass is worth pricing. It costs more per window, but it can reduce future claims, and some insurers offer premium credits for impact-resistant openings. Ask your insurer before you sign the contract so the credit factors into the real cost.
›What efficiency numbers should replacement windows hit in Denver?
Denver falls in the ENERGY STAR Northern zone: look for a U-factor of 0.22 or lower (v7.0 criteria), with equivalent-performance options up to U 0.26 when paired with higher solar gain. In practice that means a quality double-pane with low-e coatings and argon fill at minimum — and triple-pane is increasingly common at this altitude.
›Is there still a tax credit for windows in Colorado?
The federal 25C window credit expired December 31, 2025. Colorado, however, runs live IRA Home Energy Rebate programs, and whole-home efficiency retrofits that include windows can qualify under the modeled-savings (HOMES) pathway. Utility programs from Xcel and periodic City of Denver rebate rounds are also worth checking before you buy.
Sources
- — U.S. Census Bureau, American Community Survey 5-Year Estimates (B25034, B25035)
- — EPA ENERGY STAR Version 7.0 Residential Windows specification
- — DOE/PNNL IECC climate zone assignments by county
- — NOAA NCEI Storm Events Database; Rocky Mountain Insurance Information Association
- — IRS, 25C Energy Efficient Home Improvement Credit (P.L. 119-21)