Does a basement or basement bedroom need an egress window?
Yes — basements with habitable space and every sleeping room must have at least one operable emergency escape and rescue opening (IRC R310.1).
Every sleeping room (bedroom) and basements with habitable space must have at least one operable emergency escape and rescue opening that reaches the outside directly. Where a basement contains sleeping rooms, the opening is required in each sleeping room.
The opening has to work from the inside without keys, tools, or special knowledge.
Limited exceptions exist — for example, a basement used only to house mechanical equipment and not exceeding 200 square feet. A finished or occupied basement generally triggers the requirement, so confirm against R310.1 and any local amendments.
Verified against
Related answers
- What size egress window does a bedroom need? — IRC §R310.2.1
- How high can an egress window sill be above the floor? — IRC §R310.2.2
- What size does an egress window well need to be? — IRC §R310.2.3
- When does an egress window well need a ladder or steps? — IRC §R310.2.3.1
- How high does a window sill have to be above the floor to meet fall-protection rules? — IRC §R312.2.1
- What is the minimum floor area for a habitable room? — IRC §R304.1
- What is the minimum width or dimension for a habitable room? — IRC §R304.2
- What is the minimum ceiling height for a habitable room? — IRC §R305.1
Need this scoped to your jurisdiction?
Adopted edition and local amendments vary by city and county. Ask Donnie checks your jurisdiction and cites the exact adopted section.
Ask Donnie →General information based on the International Residential Code (a model code). This is AI assistance to verify — not legal advice. Confirm the adopted edition and any local amendments with your local building department (AHJ) and a licensed professional before you build.