Spokane basement planning
Spokane egress requirements & permit planning
Find the right local authority and prepare questions about an emergency escape opening before planning a basement conversion or new foundation cut.
Prepare your project enquiryFirst, identify the authority for your address
The City of Spokane publishes a residential permit process and adopts Washington State building-code requirements in its municipal code. Confirm whether your property is within city jurisdiction or is served by another authority before relying on a permit checklist.
Ask about the operable opening, not only the window size
A nominal window dimension does not establish the usable clear opening. Ask the installer and relevant authority to verify the actual opening, its height and access, the well, and any nearby deck or porch conditions. This page is a planning resource and does not certify a design.
A basement conversion has a wider scope
The current Washington amendment discusses emergency escape and rescue openings in basements and sleeping rooms, with exceptions and conditions. An egress window alone does not determine that a basement bedroom, dwelling unit or renovation is lawful. Describe your intended use to the authority.
Questions to confirm before work
Applicable rules and existing conditions
Which adopted code and local requirements apply to this specific alteration? Are any existing-building provisions relevant?
Permit and inspection responsibility
Who submits the documents, pays required fees and arranges inspections? What documentation should the owner keep?
Proposed opening and exterior route
Who confirms clear opening dimensions, sill/access conditions, well and the unobstructed route outside?
Other conversion requirements
If the project includes sleeping space or a wider remodel, what additional approvals and work apply?
Planning references
Reviewed 2026-10-13
Common questions
Is the old WAC 51-51-0310 link current?
No. The state chapter lists that older section as repealed. Use the current official emergency-opening section linked above, and verify the adopted requirements for the actual project.
Do Spokane mailing addresses all use the city permit process?
Do not assume so. Establish the authority serving the actual address before using any local permit or inspection guidance.