Window Replacement Calculator

Replacing the windows in a home is one of those projects where the sticker price hinges on dozens of small choices, and pinning down a realistic number before you call a contractor makes budgeting far less stressful. The estimate here weighs the window type you pick, the frame material, and how many openings you plan to do, since the same house can land at wildly different totals depending on those three levers and on what you hope to gain in energy efficiency and resale value.

Behind the result is a simple built-in price table, not live market data. A standard vinyl unit is priced at $300 for single-hung, $400 for double-hung and $500 for casement; wood frames add 40%, fiberglass 20% and a large size 30%. Installation is a flat fee per window that rises with the unit price: $150 when the unit is under $400, $225 from $400 to under $500 and $300 at $500 or more. The tool multiplies both by the number of windows and adds them together.

Treat the figure as a starting point rather than a quote. Real-world totals shift with your location, the bids you collect, and any structural surprises that turn up once the old frames come out. Costs that catch people off guard tend to be the peripheral ones, new trim work, hauling away the old units, and lead paint abatement in older homes, none of which show up in a bare per-window price. The sensible next move is to gather several bids from certified installers and compare them against this baseline.