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Adding windows to a house is expensive. Budget roughly $5,800 to add a single window, and double or triple that to add two or three. In some cases, adding a single window can exceed $20,000, depending on the type of exterior wall, the size of the window, the type of window, local permit costs, and other factors.
There are a range of egress window types available, including:
Single-hung: $100–$400
Double-hung: $250–$500
Horizontal/sliding: $150–$800
Casement: $200–$500
In-swing: $350–$700
When choosing a type of egress window, consider how you’d like to open it. For example, double-hung egress windows open from top to bottom and let plenty of fresh air in, whereas sliding windows slide open for easy access.
Most professionals can install a window well in two to three days, depending on the size of the well and the window you want inside it. If you’re just replacing an existing window well, the work is much less intensive, and most experts can get the job done in just one day. Connecting the window well to a drainage system or installing a custom concrete window well will naturally take longer, but even the most complicated installations shouldn’t take more than three days.
Costs depend on window size, type, material, and labor. Custom shapes or sizes typically incur higher expenses; full installation includes removing old windows.
Expect excavation below grade, creating a well for access, weatherproofing, and thorough inspections during setup.
The Valier, MT homeowners’ guide to egress window services
From average costs to expert advice, get all the answers you need to get your job done.
Window wells bring more natural light into your basement and can act as a safe point of egress. Learn about window well replacement costs in this price guide.
Find out how much it will cost to replace a basement window in your home, based on the type and size of the window, whether it’s prefab or custom, and who does the installation.