20 Best Window Replacement in Denver for 2026

🪟 20 businesses · 📍 Denver, CO
✓ Verified Google reviews · ✓ Reviewed regularly · ✓ Updated May 16, 2026
Mark Reid
Written by Mark Reid, Home Services Editor · Verified May 16, 2026
Denver's extreme weather swings put serious stress on windows. You'll see everything from scorching summer heat that warps frames to hail storms that crack glass and winter freezes that test seal integrity. Most Denver homes built before 1980 still have original single-pane windows that leak energy like crazy. The altitude here also means UV damage happens faster than at sea level, breaking down window seals and fading treatments.

Every company listed here maintains active Google Business profiles with verified customer reviews spanning multiple years of trading. We've checked their current license status with Colorado's Department of Regulatory Agencies and confirmed they carry proper insurance coverage. The selection focuses on contractors who consistently handle Denver's specific challenges, from historic Capitol Hill renovations to newer Stapleton developments.

Get at least three detailed quotes before choosing your contractor. Ask to see recent work photos and request references from jobs completed within the past year. Make sure they pull proper permits for structural changes and verify they offer meaningful warranties on both materials and installation. Don't pay large sums upfront, and always confirm the timeline includes weather delays since Denver's unpredictable conditions often push schedules back.
How We Select & Rate The Best Window Replacement in Denver, CO

Our selection process analyzes Google ratings and review patterns over extended trading periods, checking for consistency in service quality and customer satisfaction. We verify each company's active business status, relevant licenses, and insurance coverage through state databases. Professional credentials and industry certifications receive additional weight where applicable. This directory provides information only, not endorsements, so readers should still conduct their own verification before hiring any contractor.

Quick Comparison — Window Replacement in Denver, CO

# Business Rating Reviews Phone
1 Renewal by Andersen Window Replacement Recommended ⭐ 4.8 6,738 (720) 303-8859 View →
2 Champion Replacement Windows of Denver Featured ⭐ 4.4 2,484 (303) 800-2129 View →
3 303 WINDOWS Featured ⭐ 5.0 276 (303) 946-3697 View →
4 Pella Windows and Doors Showroom of Denver, CO Featured ⭐ 4.4 718 (303) 371-3750 View →
5 Reflection Windows & Doors Featured ⭐ 4.7 254 (303) 426-4474 View →
6 Gravina’s® Windows & Siding ⭐ 4.6 337 (303) 472-8462 View →
7 Gravina's Window Center of Littleton ⭐ 4.9 98 (303) 794-3192 View →
8 Window Replacement Denver ⭐ 4.8 93 (720) 701-2202 View →
9 Kraftwork Design Windows & Siding ⭐ 4.8 74 (720) 837-2113 View →
10 Espin Glass, LLC ⭐ 5.0 33 (720) 223-0828 View →
11 Veteran Windows and Doors ⭐ 4.9 42 (303) 529-0720 View →
12 The Window Foundry ⭐ 5.0 26 (720) 933-1394 View →
13 Echelon Exteriors ⭐ 5.0 18 (970) 795-8424 View →
14 Mountain View Window & Door ⭐ 4.6 53 (303) 649-2217 View →
15 Nexvue Exteriors ⭐ 5.0 15 (720) 989-8818 View →
16 Renew R Home ⭐ 4.8 22 (720) 999-2112 View →
17 Universal Windows Direct of Denver ⭐ 4.8 14 (303) 373-4236 View →
18 Mile High Windows & Doors ⭐ 4.7 14 (720) 413-3705 View →
19 AllGuard Windows and Doors Denver ⭐ 5.0 3 (970) 481-5907 View →
20 Energy Solutions Of America, LLC ⭐ 4.4 14 (303) 660-8900 View →

Our Top Picks

6
Gravina’s® Windows & Siding
4.6 (337 reviews)
Denver, CO (303) 472-8462 Website

Gravina's® Windows & Siding specializes in window replacement services for Denver area homeowners, operating from their location on W Evans Ave in the 80223 area. The company maintains a strong reputation with a 4.6/5 star rating based on 337 verified customer reviews. Their experienced team focuses on helping residents upgrade their homes with quality window installation solutions.

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7
Gravina's Window Center of Littleton
4.9 (98 reviews)
Denver, CO (303) 794-3192 Website

Gravina's Window Center of Littleton specializes in professional window replacement services throughout the Denver area. The company has earned a strong reputation with a 4.9-star rating from 98 verified customer reviews. Located at 1500 W 38th Ave in the 80211 area, they provide comprehensive window installation solutions for residential and commercial properties.

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8
Window Replacement Denver
4.8 (93 reviews)
Denver, CO (720) 701-2202 Website

Window Replacement Denver specializes in residential and commercial window replacement services throughout the Denver area from their location on North Humboldt Street. The company has earned a 4.8-star rating from 93 verified customer reviews, reflecting their commitment to quality installation and customer service. They serve the 80218 postcode and surrounding Denver neighborhoods with professional window replacement solutions.

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9
Kraftwork Design Windows & Siding
4.8 (74 reviews)
Denver, CO (720) 837-2113 Website

Kraftwork Design Windows & Siding specializes in professional window replacement services for Denver homeowners and businesses. The company maintains a strong reputation with a 4.8/5 star rating from 74 verified customer reviews, reflecting their commitment to quality installations and customer satisfaction. Based on Columbine Street in the 80206 area, they provide comprehensive window replacement solutions to enhance energy efficiency and curb appeal throughout the Denver metro area.

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10
Espin Glass, LLC
5.0 (33 reviews)
Denver, CO (720) 223-0828 Website

Espin Glass, LLC provides professional window replacement services throughout the Denver area from their Kingston Street location. The company has earned a perfect 5-star rating from 33 verified customer reviews, reflecting their commitment to quality installation and customer satisfaction. They serve homeowners and businesses in Denver and surrounding communities with comprehensive window replacement solutions.

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11
Veteran Windows and Doors
4.9 (42 reviews)
Denver, CO (303) 529-0720 Website

Veteran Windows and Doors provides professional window replacement services throughout Denver, operating from their location on S Navajo St in the 80223 area. The company has earned a strong reputation with customers, maintaining a 4.9-star rating based on 42 verified Google reviews. Their experienced team specializes in helping Denver homeowners upgrade their windows to improve energy efficiency and enhance property value.

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12
The Window Foundry
5.0 (26 reviews)
Denver, CO (720) 933-1394 Website

The Window Foundry provides professional window replacement services throughout the Denver area from their location on South Ames Street. This family-owned company specializes in installing energy-efficient windows for residential and commercial properties, helping customers reduce energy costs and improve home comfort. With a perfect 5-star rating from 26 verified customer reviews, they have built a strong reputation for quality workmanship and reliable service in the 80235 area and surrounding neighborhoods.

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13
Echelon Exteriors
5.0 (18 reviews)
Denver, CO (970) 795-8424 Website

Echelon Exteriors provides professional window replacement services to Denver homeowners from their Federal Boulevard location. The company has earned a perfect 5-star rating from 18 verified customer reviews, reflecting their commitment to quality installation and customer satisfaction. They serve the Denver area with residential window replacement solutions designed to improve energy efficiency and home value.

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14
Mountain View Window & Door
4.6 (53 reviews)
Denver, CO (303) 649-2217 Website

Mountain View Window & Door specializes in window replacement services for Denver area homes and businesses, operating from their location on South Jason Street in the 80223 area. The company has earned a 4.6-star rating from 53 verified customer reviews, reflecting their commitment to quality installation and customer satisfaction. Their experienced team helps Denver residents improve energy efficiency and curb appeal through professional window replacement projects.

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15
Nexvue Exteriors
5.0 (15 reviews)
Denver, CO (720) 989-8818 Website

Nexvue Exteriors specializes in window replacement services throughout the Denver area, operating from their facility on W Evans Ave. The company has earned a perfect 5-star rating from 15 verified customer reviews, reflecting their commitment to quality installation and customer satisfaction. They serve homeowners across Denver looking to upgrade their windows for improved energy efficiency and curb appeal.

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16
Renew R Home
4.8 (22 reviews)
Denver, CO (720) 999-2112 Website

Renew R Home provides professional window replacement services throughout the Denver area from their location on South Jason Street. The company has earned a 4.8-star rating based on 22 verified customer reviews, reflecting their commitment to quality installations and customer satisfaction. They serve homeowners in the 80223 area and surrounding Denver neighborhoods with residential window replacement solutions.

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17
Universal Windows Direct of Denver
4.8 (14 reviews)
Denver, CO (303) 373-4236 Website

Universal Windows Direct of Denver specializes in residential window replacement services throughout the Denver area. The company maintains a 4.8/5 star rating based on 14 verified customer reviews, reflecting their commitment to quality installations and customer satisfaction. Operating from their Quebec Street location in the 80207 area, they provide professional window replacement solutions for homeowners seeking to improve energy efficiency and home value.

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18
Mile High Windows & Doors
4.7 (14 reviews)
Denver, CO (720) 413-3705 Website

Mile High Windows & Doors specializes in window replacement services throughout the Denver area. The company has earned a 4.7 out of 5-star rating based on 14 verified customer reviews, reflecting their commitment to quality installation and customer satisfaction. Their experienced team helps homeowners improve energy efficiency and enhance curb appeal with professional window replacement solutions.

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19
AllGuard Windows and Doors Denver
5.0 (3 reviews)
Denver, CO (970) 481-5907 Website

AllGuard Windows and Doors Denver specializes in window replacement services for residential and commercial properties throughout the Denver area. The company operates from its Delaware Street location in the 80223 area, providing professional installation and replacement solutions. With a perfect 5-star rating based on 3 verified customer reviews, AllGuard has built a reputation for quality workmanship among local clients.

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20
Energy Solutions Of America, LLC
4.4 (14 reviews)
Denver, CO (303) 660-8900 Website

Energy Solutions Of America, LLC provides professional window replacement services to Denver residents from their Cook Street location in the 80206 area. The company maintains a 4.4-star rating based on 14 verified customer reviews, reflecting their commitment to quality installation work. Their team helps homeowners improve energy efficiency and home value through modern window solutions.

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Transparency notice: Recommended (#1) and Featured (positions 2-5) listings may be paid placements. All other rankings are determined by a combined score drawn from Google ratings, review counts, and reputation signals gathered from multiple independent online sources. How we verify →

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Frequently Asked Questions

How much does a window replacement cost in Denver?
Standard double-hung vinyl windows typically run $300-$600 per window installed. Wood windows range from $600-$1,200 each, while high-end options like fiberglass or impact-resistant glass can hit $800-$1,500 per window. Full house projects often include volume discounts. Factors affecting price include window size, frame material, glass type, and installation complexity. Getting quotes from three different contractors gives you a realistic price range for your specific project.
Do I need permits for window replacement in Denver?
Simple like-for-like window replacements usually don't require permits if you're not changing the opening size. However, if you're enlarging openings, changing structural elements, or replacing more than three windows, Denver typically requires permits. Historic districts like Highlands and Capitol Hill have additional review requirements. Your contractor should know the local rules and handle permit applications when needed.
What window types work in Denver's climate?
Double or triple-pane windows with low-E coatings perform well here since they handle temperature swings and reduce UV damage. Vinyl frames expand and contract less than aluminum in our climate extremes. Impact-resistant glass makes sense in hail-prone areas like the Tech Center. Avoid cheap single-pane windows, even for garages, since they'll fog up from condensation and waste energy year-round.
How long does window replacement take?
Most contractors can install 8-12 standard windows per day with a two-person crew. Custom or oversized windows slow things down significantly. Weather delays are common here, especially during spring hail season or winter cold snaps when caulking won't cure properly. Order windows 4-6 weeks ahead since popular sizes and colors often back-order. Plan for 2-3 days of installation time for typical whole-house projects.
Should I replace windows in winter?
Denver contractors work year-round, but winter installations require extra care with sealing and caulking. Temperatures below 40°F prevent proper caulk curing, so contractors often use temporary sealing and return for final weatherproofing when it warms up. Winter scheduling is easier and sometimes cheaper, but expect possible delays during cold snaps. Spring and fall offer ideal installation conditions.
How do I verify a window replacement contractor?
Check their license status on Colorado's DORA website and confirm they carry liability insurance and workers' compensation. Ask for local references from jobs completed within six months and drive by to see the work quality. Verify they offer written warranties covering both materials and labor. Red flags include door-to-door sales, requests for full payment upfront, or contractors without local business addresses.