How Much Does It Cost to Install Egress Window? (Price Guide)

An egress window is a basement or lower-level window large enough for a person to climb out of in an emergency, and for a firefighter to climb in. Building codes require one in every bedroom and in finished basements, which is why most installs happen during a basement remodel.

The window itself is the smaller part of the bill. Most of the cost comes from cutting through the foundation wall, digging a well outside, and handling drainage. That is why a new egress window costs far more than swapping an existing one.

Window style affects the unit price and how easily the window opens. Casement windows hinge on the side and open fully, which helps meet the clear-opening rules. Sliding and hung windows may need a larger frame to give the same usable opening.

These prices cover the window unit only. They do not include the opening, the well, or the labor.

When there is no window opening at all, the contractor has to excavate outside the foundation, cut a new opening, install a lintel above it, and set a window well that keeps soil out and lets water drain away. This work is where costs climb.

Soil type, depth, and access change this number. Hard clay, rock, or a tight space beside the house slows the work and can require hand digging instead of a small excavator.

Local codes decide the details, so check yours before you order a window. In general, a code-compliant egress window must open from the inside without keys or tools, offer a minimum clear opening, and sit low enough to climb through. A window well deeper than a certain depth also needs a permanent ladder or steps. Your building department can give you the exact dimensions. The International Code Council publishes the model code many jurisdictions adopt at iccsafe.org.

• Enlarging an existing window opening. Often cheaper than a brand-new opening because part of the framing is already there, but the foundation still needs cutting.
• Cutting a new opening in a solid wall. Higher cost because of the structural work and the well.
• Replacing a window that is already egress-size. The cheapest route, since it is mostly a window swap.

Poured concrete walls cost more to cut than block or stone, and cutting a bearing wall may call for an engineer.

• Foundation type. Concrete is harder to cut than block.
• Window size and style. Larger windows and special glass cost more.
• Well material and depth. Plastic, metal, and masonry wells differ in price.
• Excavation difficulty. Rock, utilities, and tight access slow digging.
• Drainage. Wells need gravel and a drain path to avoid flooding the window.
• Permits and inspections. Most areas require both.
• Number of windows. A second or third window in the same project may cost less per window because the crew is already set up. Ask for a multi-window price.

Two sources are compared here. Their ranges overlap closely, even though one gives a midpoint and the other describes a component breakdown.

Local labor rates, soil, and the foundation material shift prices from one city to the next. A quote that looks high may include a larger well, better drainage, or interior finishing work.

Cutting a foundation is a job for a pro. A concrete wall holds up the house, and a wrongly sized opening can compromise it. A professional also knows the permit process, sets the window well so water drains away, and is familiar with local code. Most homeowners hire a contractor for the opening and well, and then handle only interior finishing themselves.

• Does the price include the window, well, excavation, and drainage?
• Who pulls the permit and schedules the inspection?
• Does the quote include cutting and a lintel or header?
• What happens to the excavated soil?
• Is interior trim and drywall repair included?