Do I Need a Permit for a Basement Walkout?
A new basement walkout or separate entrance generally requires building-permit review because it cuts into the foundation or exterior wall and introduces stairs, landings, guards, drainage and grading. The location also needs to work with zoning, property lines and existing site conditions.
Foundation and wall opening
The proposed entrance can affect foundation walls, lintels, framing and the building load path, so existing and proposed construction must be shown accurately.
Stairs, landings and guards
Permit drawings commonly need dimensions and construction information for exterior stairs, landings, guards, handrails and headroom where applicable.
Site plan, grading and drainage
The entrance location, setbacks, property information, grades and drainage conditions can affect feasibility and the permit package.
Underpinning and engineering
If the work lowers or alters foundations, approaches neighbouring footings or creates complex structural conditions, a professional engineer may be required for the applicable scope.
Property and municipality still matter
This answer is a practical starting point, not a permit decision for every property. Zoning, existing conditions, applicable law, project size and the municipality’s current application guide can change what is required.
Related 828 Design service
Basement Walkout Permit Drawings →
Reviewed against current municipal permit guidance: August 2026. Requirements are confirmed for the actual property and project before design/submission.
Need drawings for this project?
Send the property address, what you want to build and any survey, existing drawings, photos or municipal comments you already have.