Window Replacement Cost Estimator
How to Use the Window Cost Estimator Enter the number of each window type in your home, select the quality level, frame material, glass type, installation method, and whether to include labour. The estimator gives you a total project cost, cost per window, and a realistic low-to-high range based on your selections. Insert vs Full-Frame […]
How to Use the Window Cost Estimator
Enter the number of each window type in your home, select the quality level, frame material, glass type, installation method, and whether to include labour. The estimator gives you a total project cost, cost per window, and a realistic low-to-high range based on your selections.
Replace windows in complete sets when possible — matching frame colours and styles between old and new windows from different manufacturers and production runs is very difficult. Replacing all windows together also reduces labour cost by 15–25% per window.
Insert vs Full-Frame Replacement
An insert (pocket) replacement keeps the existing window frame and installs a new window unit inside it. This is less disruptive, faster, and less expensive — typically $150–$250 per window for labour. The downside is that if the existing frame is rotted, out of square, or causing air leaks, the problem is not addressed. A full-frame replacement removes the entire window including the frame and installs a completely new unit from the rough opening. This costs $250–$450 per window for labour but allows inspection and repair of the rough opening, adding flashing and house wrap, and guarantees a perfectly square installation. If you have older windows with rotted sills or known air infiltration, full-frame replacement is worth the additional cost.
Glass Type and Energy Performance
Standard double-pane windows (insulated glass unit or IGU) provide R-2 to R-3 thermal resistance. Low-emissivity (Low-E) coated double-pane glass reflects radiant heat — in summer it keeps heat out, in winter it keeps heat in. Low-E glass adds approximately $50–$100 per window but can reduce heating and cooling costs by 10–25% and is the best value upgrade. Triple-pane glass adds R-7 to R-10 thermal performance and significantly reduces condensation in cold climates, but adds $200–$350 per window — the payback period is long unless you are in a very cold climate (Climate zones 6–8). Look for ENERGY STAR certified windows for your climate zone.
FAQs
How long do replacement windows last?
Quality vinyl windows typically last 20–40 years. The most common failure mode is seal failure between the panes — the insulating gas escapes and condensation forms between the panes (fogged glass). This usually occurs 15–25 years after installation. Fiberglass and wood windows can last 40–50+ years with proper maintenance. Seal failure is not always covered under warranty after 10–15 years, so consider it a replacement cycle when budgeting long-term.
Do replacement windows add value to your home?
Window replacement returns approximately 65–75% of cost at resale according to Remodeling Magazine. This is not the highest ROI project, but new windows improve curb appeal significantly, reduce energy costs, and are often a buyer expectation in older homes. The functional benefits (reduced drafts, easier operation, better soundproofing) make the project worthwhile regardless of resale ROI for homeowners planning to stay 10+ years.