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Egress Window Sizing for Legal Basement Bedrooms

How big must an egress window be for a basement bedroom?

If you live in a Pompey hillside home and you want to convert the basement into legal sleeping space for a teenager, an in-law, or a rental tenant, the line that separates a finished basement from a legal bedroom is the egress window. Without one sized to code, the room is not a bedroom in the eyes of the appraiser, the insurance carrier, or the fire marshal. With one sized correctly, the basement bedroom becomes real square footage that appraises and rents.
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Dana S

The Code Numbers You Cannot Negotiate

New York basement egress window code requires a minimum opening of 5.7 square feet of clear opening when the window is fully open, with at least 20 inches of width, at least 24 inches of height, and a sill no more than 44 inches from the finished basement floor. The window well outside must measure at least 9 square feet with a horizontal projection of 36 inches, and must include a fixed ladder or steps if it exceeds 44 inches in depth. These numbers do not bend for design preference.

Pompey Hillside Realities

Pompey’s sloped lots produce two egress patterns. Daylight-side basements where the existing grade is already below the basement window line, making the cut straightforward. And buried-side basements where the foundation is fully below grade, requiring an actual foundation cut plus an exterior excavation for the window well. The buried-side path is meaningfully more expensive, and is the same scope as a proper egress window foundation cut on a flat-lot home.

The egress window is the single permit detail families most often try to skip and most often regret. The window is the room. Without it the bedroom is not a bedroom, and the basement finish dollars stop earning the resale return they were spent for. We will not finish a basement bedroom without sizing the egress correctly first.

– Sarah Jenkins, Permitting and Zoning Coordinator

Cost and Sequencing

A daylight-side egress install runs 1800 to 3500 dollars per opening. A buried-side install requiring foundation cut, exterior excavation, and a finished well runs 4500 to 7500 dollars per opening. Plan for both inspections (foundation cut and final window install) and budget for waterproofing detailing at the cut to prevent future seepage.

Where Egress Fits in a Larger Basement Finish

Egress is just one piece of a code-compliant basement finishing scope. The full path includes moisture remediation first, vapor control, insulation, framing, mechanicals, egress installation, drywall, finish, and final inspection. Some Pompey families pair the egress with a basement home theater code-compliant entertainment space in the adjacent zone, since the framing and electrical happen in the same phase.

Egress Window Code Minimums (NY Residential)

Want a Code-Compliant Egress Plan?

SAP Construction has been installing code-compliant basement egress in Pompey hillside homes since 2016. Schedule a consultation and our project manager will walk the basement, scope the cut, and deliver a transparent estimate within 24 hours.

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Family Room Bump-Out: Permitting Path in Onondaga County

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Onondaga County ADU Permit Walkthrough

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FREQUENTLY ASKED QUESTIONS

STILL HAVE QUESTIONS?

Our experts are here to help. Contact us directly for a consultation or any specific questions about your project.

A clear opening of 5.7 sq ft, at least 24 in high and 20 in wide, with the sill no higher than 44 in.
Yes, a sleeping room below grade is not legal without a compliant egress window or door.
Yes, we saw and reinforce the opening and add a code-sized window well with a ladder.

STILL HAVE QUESTIONS?

Our experts are here to help. Contact us directly for a consultation or any specific questions about your project.

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