Sources & Statistics
The statistics and claims on our website are based on research from reputable industry sources. This page provides full transparency about where our numbers come from.
Important Disclaimer
Actual results vary based on your home's existing windows, local climate conditions, energy costs, home size, window quality, and installation. The figures below represent industry averages and studies—your individual results may be higher or lower. We recommend obtaining a personalized assessment for accurate estimates specific to your home.
Energy Savings Statistics
Average Annual Energy Savings
Homeowners who replace single-pane windows with ENERGY STAR certified windows can save between $125 and $340 per year on energy costs, with an average of approximately 13% reduction in household energy bills.
energystar.gov/products/res_windows_doors_skylights
Energy Loss Through Windows
Heat gain and heat loss through windows account for 25%-30% of residential heating and cooling energy use. Replacing inefficient windows can significantly reduce this energy waste.
energy.gov/energysaver/update-or-replace-windows
Savings Range by Climate
Upgrading to ENERGY STAR qualified windows can save 7%-15% on annual household energy bills, or roughly $71-$501 annually, depending on your geographic location and the type of window being replaced.
energy.gov - Guide to Energy Efficient Windows (PDF)
Return on Investment (ROI) Statistics
Vinyl Window Replacement ROI
According to the 2024 Cost vs. Value Report, vinyl window replacement offers an average return on investment of 67.1% of the project cost when selling your home.
jlconline.com/cost-vs-value/2024
Wood Window Replacement ROI
Wood window replacements typically recover 62.9% to 65% of the project cost at resale, according to industry reports.
jlconline.com/cost-vs-value/2024
Average Resale Value Added
A whole-home vinyl window replacement (averaging $21,000 in cost) typically adds approximately $12,000-$14,000 to home resale value, in addition to ongoing energy savings while you live in the home.
money.com/do-new-windows-increase-home-value
Additional Benefits
Homeowner Satisfaction
New wood and vinyl windows earned a 9.6 out of 10 "Joy Score" for exterior remodeling projects based on homeowner-reported satisfaction.
NAR Remodeling Impact Report (via HomeLight)
Window Lifespan
Quality residential windows typically last 15-20 years on average, with well-maintained vinyl windows potentially lasting 20-30 years or more.
Full Reference List
U.S. Environmental Protection Agency
https://www.energystar.gov/products/res_windows_doors_skylights
U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy
https://www.energy.gov/energysaver/update-or-replace-windows
U.S. Department of Energy
https://www.energy.gov/sites/prod/files/guide_to_energy_efficient_windows.pdf
Remodeling Magazine / Zonda Media
https://www.jlconline.com/cost-vs-value/2024
U.S. Environmental Protection Agency
https://www.energystar.gov/products/res_windows_doors_skylights/methodology-energy-star-savings-estimates-windows
National Association of Realtors
https://www.nar.realtor/research-and-statistics/research-reports/remodeling-impact
How to Interpret These Statistics
These statistics represent national averages and industry studies. Your actual results depend on many factors:
- Your home's current window type (single-pane vs. double-pane)
- Local climate and energy costs (Colorado has unique high-altitude conditions)
- Window quality and features selected
- Proper installation by qualified professionals
- Home size and number of windows
- Local real estate market conditions (for ROI calculations)