How much does an egress window installation cost?

Egress window installation costs $2,500-$5,000 per window in 2025, including the window, well, excavation, and waterproofing. Costs vary based on foundation type (poured concrete vs. block), well size, and whether interior finishing is included. DIY excavation can save $500-$1,000.

What are the code requirements for egress windows?

IRC requires egress windows to have a minimum opening of 5.7 sq ft (5.0 sq ft at grade), with a minimum width of 20 inches and height of 24 inches. The sill height must be no more than 44 inches from the floor. Window wells deeper than 44 inches need a permanent ladder or steps.

Do I need an egress window in my basement?

Building code requires an egress window in every basement bedroom and in basements used as habitable space. Even if not required, egress windows add natural light, ventilation, and emergency exit capability. They also increase basement usability and home value by $5,000-$10,000.

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Assumptions & Sources

Assumptions

Code requirements: Based on IRC Section R310 (2021). Local codes may be stricter.
Window pricing: Casement egress windows from major manufacturers.
Concrete cutting: Based on standard 8-10" foundation walls.
Excavation: Assumes average soil conditions and equipment access.
Permits: Typical residential permit fees. Actual costs vary by jurisdiction.

Data Sources

RSMeans Construction Cost Data 2025
International Residential Code (IRC) Section R310
National Glass Association pricing data
Contractor pricing surveys 2024-2025

Last updated: February 2026

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