Egress Window Questions, Answered

It's a code-compliant emergency escape and rescue opening cut into a basement wall - big enough for a person to climb out of and a firefighter to climb into. Under IRC R310 it needs at least 5.7 square feet of net clear opening, 24 inches of clear height, 20 inches of clear width, and a sill no more than 44 inches above the floor. It's what legally turns a basement room into a bedroom.

A full install - concrete cut, window, code well, and drainage - typically runs $3,500–$6,500. Well-only replacements run $1,000–$3,000, window swaps in existing openings $400–$1,100, covers $150–$600. The permit ($150–$600 depending on the city) is itemized at cost. Every quote is flat after a free on-site measure.

Yes - cutting a foundation is permitted, inspected work everywhere in the metro. Des Moines proper files through the city's Permit and Development Center; Ankeny through its Development Services; West Des Moines through its Building Inspection Division; Urbandale through Community Development; Johnston through its Community Development/Building Department. We file with the correct office for your address.

The R310 numbers are, but the adopted code editions differ: Des Moines and Johnston enforce the 2024 IRC, West Des Moines the 2021, Urbandale the 2018, and Ankeny its own locally amended 2024 Ankeny Residential Code. Editions change review details and amendments, not the escape-opening math - and the local code always wins where it differs.

A below-grade egress window needs a well with at least 9 square feet of horizontal area and minimum 36 inches of width and 36 inches of projection. If the well is deeper than 44 inches, it needs a permanently attached ladder or steps - rungs at least 12 inches wide, projecting at least 3 inches from the wall, spaced no more than 18 inches apart.

Yes. Each sleeping room needs its own compliant opening - one shared window down the hall doesn't satisfy the code. Finishing two basement bedrooms means two openings, which is why cutting both in one mobilization is the cost-smart move.

It makes a bedroom count. Appraisers include only conforming bedrooms, and missing egress is the most common reason a basement room is struck from the count. Going from 3 legal bedrooms to 4 typically moves value by more than the install costs - though we never promise specific appraisal outcomes, because appraisals belong to appraisers.

This is our most deadline-driven job. Once the city issues the permit, the on-site work is 1–2 days. The variable is each city's review clock, which we build into the schedule - tell us your closing date up front and we'll tell you honestly whether it's makeable.

Excavation gets hard and expensive once the ground freezes toward the metro's 42-inch frost line - dig season is roughly April through November. Winter is for measures, quotes, and permits (so you're first in the spring queue) and for interior work like window swaps in existing openings, which run year-round.

Glass block itself can never be egress - it doesn't open. The fix is removing the block, and usually cutting the opening larger and lower, since original openings in pre-war Des Moines homes are almost always too small and too high to meet the 5.7-square-foot and 44-inch-sill numbers. That's a standard job for us, common in Beaverdale and the east and south sides.

No conflict - and in Iowa the two go together constantly, since all 99 counties are EPA radon Zone 1 and most finished basements here get mitigation. Sequence both before drywall: cut the egress openings first (the messy part), run mitigation, then finish. A sealed, mitigated basement with legal bedrooms is the end state.

For price and method, yes. Block walls come out course by course and often land at the lower end of the range; poured walls need diamond-blade wet sawing and land mid-to-upper range. For feasibility, no - both are routine. Older stone or mixed foundations get evaluated at the measure before anyone cuts.

Not when it's done right. The opening gets a properly sized lintel or header to carry the wall load and a pressure-treated buck frame anchored to the concrete - and the city inspects the structural work before it's covered. Skipped or undersized headers are the classic cheap-install failure, which is exactly why permits exist.

A gravel drainage bed under the well, tied into the footing drain tile where the house has one - or a deep gravel dry well where it doesn't - plus backfill compacted and graded away from the wall, and usually a polycarbonate cover. Central Iowa clay holds water against foundations; drainage is half the job.

Yes - well replacement on an existing opening runs $1,000–$3,000 depending on material and dig, and it includes rebuilding the drainage that the old well probably never had. If the well is deeper than 44 inches, the new one gets a permanently attached ladder to meet code.

They're the foundation of one. A legal basement living unit needs compliant escape openings in every sleeping room, and lenders, insurers, and city rental inspections all check for them. If you're planning an ADU, get the openings and the drainage plan in before finishes - it's dramatically cheaper than retrofitting.

Independent local contractors. Iowa law requires construction contractors to register with the Iowa Division of Labor, so ask for that registration and a certificate of insurance. We don't invent credentials beyond that: no license numbers exist for general contracting in Iowa, so anyone quoting one at you is decorating.

Send the form, ideally with a photo of the wall or well. You get a free on-site measure - foundation type, footing depth, joists, utilities, access - and a flat written quote with the permit itemized. If a cheaper service solves your actual problem, the measure is where we say so.