The cost to install house windows

Written by kendra dahlstrom
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The cost to install house windows
New windows improve the aesthetics of a home. (Window image by FJ Medrano from

Window replacement adds value to a home and also improves it’s energy efficiency. Improved energy efficiency saves homeowners money in heating and cooling. This, however, often comes with a hefty price tag. Both the cost of the window, and the price of labour to install the window remain high.


Replacing a window inside a sturdy, existing frame costs between £195 to £455 per window in 2010, according to the website Cost Helper. This only goes for new window replacements measuring exactly the same as the old. Of course higher-quality windows, like those filled with argon gas, cost as much as £650 per window.

New Construction

Sometimes the existing window frame simply won’t hold a new window due to damage or rotting wood. In this case, and in the case of new construction, a professional must build new window frames. This adds between 50 to 100 per cent to the cost per window, according to Cost Helper.

What's Included

Window installers' prices include removing the old windows, putting in the new, cleaning up the mess and washing the installed window, states Cost Helper. Sometimes the cost includes old window disposal and sometimes it doesn’t. Ask each contractor so you can compare apples to apples.

Custom Windows

Oddly shaped windows, or extra large windows come with a much steeper price tag. Also, when the homeowner wishes to enlarge the window frame to allow for a bigger window, this costs much more than the standard £195 to £455. Expect to pay 50 to 100 per cent more for these custom jobs, according to Cost Helper.

Do It Yourself

Window replacement strains the pocketbook, especially when replacing multiple rooms. To save money, some people attempt the project themselves. In 2010, a standard 30-inch by 48-inch window costs between £97 and £325, according to the website Do it Yourself. The materials needed for such a project cost between £19 to £32 in 2010, states the website Vinyl Replacement Windows. Completion of window replacement typically takes around three hours per window.

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