How much does an egress window well cost?

An egress window and well installation costs $2,500-$5,000 total. This includes cutting the foundation, installing the window ($500-$1,500), the well itself ($500-$2,000), and labor. It's required by code for any basement bedroom and adds safety, light, and property value. Do window wells need covers?

Do window wells need covers?

Window well covers aren't universally required by code but are highly recommended. They prevent debris accumulation, keep rain and snow out, reduce leaks, and improve safety (prevent falls). Bubble/dome covers ($30-$100) are most popular. Egress well covers must open from the inside without tools. Why is my window well filling with water?

Why is my window well filling with water?

Common causes: insufficient gravel at the bottom, no drain connection to the sump/drain tile system, silted-up gravel, or a window well cover that directs gutter water into the well. Fix by: adding 6-12 inches of clean gravel, connecting a drain pipe to your sump system, and installing a cover. What are egress window requirements?

What are egress window requirements?

Egress windows need a minimum opening area of 5.7 sq ft, minimum 24-inch opening height, minimum 20-inch width, and the sill must be no higher than 44 inches from the floor. Window wells must have at least 9 sq ft floor area and be at least 36 inches wide. Wells deeper than 44 inches need a permanent ladder.

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Siding & Exterior

Window Well Guide: Types, Covers, Drainage & Safety

Lumberama Editorial Team, Basement & Foundation Specialists Oct 8, 2026 8 min read

Window Well Types

Standard corrugated metal: Galvanized steel half-circle. Most common and affordable. Sizes: 24-60 inches wide, 12-48 inches deep. Cost: $30-$100 each. Lifespan: 15-25 years.

Galvanized steel (flat panel): Cleaner appearance than corrugated. More rigid. Cost: $50-$150 each.

Composite/plastic: Won't rust. Lighter weight. More attractive options. Cost: $50-$200 each. Various colors and textures.

Masonry/stone: Built with stone, brick, or block. Custom sizes and shapes. Most attractive option. Cost: $500-$2,000+ each. Permanent installation.

Egress window wells: Larger size to meet egress code. Stepped design for escape. Minimum requirements: 36 inches projection from wall, 9 sq ft floor area, min 36 inches wide. Cost: $500-$2,000 for well + egress window installation: $2,500-$5,000 total.

Egress Requirements

When egress is required: Any basement bedroom must have an egress window. Existing bedrooms may be grandfathered (check local codes). New construction always requires egress for bedrooms.

Window requirements: Minimum opening area: 5.7 sq ft. Minimum opening height: 24 inches. Minimum opening width: 20 inches. Maximum sill height: 44 inches from floor.

Window well requirements: Minimum 9 sq ft floor area. Minimum 36 inches wide. If deeper than 44 inches: permanent ladder or steps required. Ladder rungs: 12 inches wide, 3 inches projection, max 18 inches apart.

Covers

Bubble/dome covers: Clear polycarbonate dome. Allows light in. Keeps debris, rain, and snow out. Cost: $30-$100 each. Most popular option.

Flat grate covers: Metal or polycarbonate grid. Supports foot traffic. Allows some debris to enter. Cost: $20-$80 each.

Custom fitted covers: Made to exact measurements. Best fit and seal. Polycarbonate or metal. Cost: $100-$400 each.

Egress-rated covers: Must open from inside without tools. Spring-loaded or hinged. No locks or latches that prevent escape. Cost: $100-$300 each. Required for egress wells.

Drainage

Proper drainage is critical: Water pooling in window wells is the most common cause of basement window leaks.

Gravel fill: 6-12 inches of 3/4-inch washed gravel at bottom. Provides drainage layer. Keeps soil away from window. Replace silted gravel every 5-10 years.

Drain connection: Connect to interior drain tile or sump system. 4-inch pipe from bottom of well to drain tile. Ensures water exits even in heavy rain.

French drain option: If no interior drain tile, install mini French drain from well to daylight or dry well.

Waterproofing: Seal window frame to foundation. Apply waterproof membrane behind well. Ensure well is firmly attached to foundation (no gaps). Caulk between well and foundation.