Start with Barrie’s current suite guidance
Barrie’s current ARU program recognizes additional units created through interior conversions, additions and detached coach-house style projects, subject to zoning and building-permit approval. The city is also offering 2026 permit-fee incentives, so applicants should use the current ARU program and planning material.
Open the official Barrie suite source ↗Housing changes elsewhere in Central Ontario do not establish permission on this parcel. Use the Barrie zoning and permit route for the local answer.
Ontario: the provincial layer
For Ontario properties covered by the ARU framework, the provincial layer generally enables three units in the main residence or two there plus one in an accessory building. The municipality still applies its zoning and permit standards.
Ontario additional residential unit framework ↗Use this order before committing to a design
What kind of unit?
Choose the unit type first so the zoning, setback and building-code research applies to the right form of housing.
Is the use allowed?
Verify the current planning permission for this parcel rather than relying on a neighbour’s recent project.
Can the building comply?
The building permit tests safety and construction, not just room count. Plan for egress, fire protection and building services.
Can the site serve it?
Site planning should include service routes and access, not only the new unit’s floor plan.
How to sequence a Barrie suite project
The project is not finished at permit issuance. Track inspections and final sign-off so the approval record matches the completed dwelling.
Before buying, distinguish “existing” from “approved.” Ask for documentation showing the suite’s permit and inspection status.
Official sources
Reviewed 2026-09-14. Start with the dedicated municipal suite source, then test the project against the provincial framework and the current permit file for the property.