Window Replacement Contractors in Longmont, Colorado
Residential window replacement and installation..
Longmont is a Boulder County city with strong contractor demand for roofing, plumbing, and HVAC.
Replacing old single-pane or failing double-pane windows with modern energy-efficient units can dramatically reduce heating and cooling costs while improving comfort and curb appeal. Vinyl, fiberglass, and wood-clad frames each offer different aesthetics and maintenance profiles. Low-E glass coatings, argon fills, and triple-pane options further boost insulation. A quality window installer ensures proper flashing, shimming, and insulation around the frame to prevent air and water infiltration — poor installation negates the benefits of even the best window.
6
Listed contractors
★ 4.5
Avg rating (4 rated)
$0k–$1k
Typical cost
Top rated window replacement contractors in Longmont
What to look for when hiring a window replacement contractor
- ✓Ask for the exact window brand, series, and U-factor/SHGC ratings in the written estimate.
- ✓Confirm whether the price is for insert (pocket) replacement or full-frame replacement.
- ✓Verify the contractor is certified by the window manufacturer for warranty purposes.
- ✓Ask about disposal of old windows and cleanup.
Window Replacement contractors in Longmont(6 listed)
How much does window replacement cost in Longmont?
Vinyl double-hung: $400–$800 installed. Fiberglass or wood-clad: $700–$1,200+. Whole-home projects (10–20 windows) typically run $6,000–$18,000.
Window Replacement contractors in Longmont — FAQ
How many window replacement contractors are in Longmont?
EdgeLocal lists 6 licensed window replacement contractors in Longmont, Colorado. All listings are sourced from state licensing registries.
What is the average rating for window replacement contractors in Longmont?
Window Replacement contractors in Longmont have an average Google rating of 4.5 stars across 4 rated contractors on EdgeLocal. Ratings are sourced from Google Business profiles.
Do window replacement contractors in Longmont need to be licensed?
Yes. Colorado requires window replacement contractors to hold a valid state license. Always verify a contractor's license is current and in good standing before signing any contract or allowing work to begin.
How do I find a reliable window replacement contractor in Longmont?
Start by verifying the contractor holds a valid Colorado license. Check their Google rating and read reviews. Get at least three written estimates. Confirm they carry general liability and workers' compensation insurance. Ask for references from recent Longmont jobs.