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Estimating the Cost of Replacement Windows

According to The National Association of Home Builders, windows should last between 15 to 30 years. That means most homeowners buy new windows only once or twice, depending on how long they own their home. That's good news, since window prices can be expensive, especially for non-standard sized openings.

Price Estimates

On CostHelper.com, a website that provides general estimates for a wide range of products, replacement windows cost, on average, anywhere from $300 to $700 per window when the replacements are placed inside existing, structurally sound window frames. The price can go as high as $1,000 per window, especially for windows that are double- and triple-glazed for extra soundproofing and those filled with argon gas to increase energy efficiency. Window size and shape can impact these ballpark cost estimates.

Window replacements cost more if a contractor needs to rebuild the window frame. Costs for this type of work are comparable to new construction windows and run as much as 50 to 100 percent more than replacement windows.

Custom Window Shapes

Homeowners with non-standard size windows need to purchase custom windows or change the opening size of the window. Either method can significantly increase window prices. If you have non-standard windows, check the websites of several manufacturers in case one of them offers the size you need as a standard product.

Installation Options

You may also find that consulting with an experienced contractor may yield ideas for how to best address your unique window replacement requirements at the most reasonable price. This can be particularly important if you have unusual window shapes or windows that are very difficult to reach.

Experienced do-it-yourselfers can sometimes save money by installing their own windows, but this is a job that requires extra care for weatherproofing and air-tight installation, so proceed with caution and a very sturdy ladder.