ARU Permits

All new and existing additional residential units must comply with the Ontario Building Code and require a permit. The rules for permits are different for a new build construction unit versus renovating an existing building to create additional units. Building Officials will inspect to make sure the additional residential unit(s) in your house or on your property meet safety standards and the Ontario Building Code.

Apply online through DASH (Development and Services Hub), our online portal that gives you 24 / 7 access to planning, development, and building services and active development activity.

Additional residential unit permit guide

Check out our Additional Residential Unit Permit Guide for more information on Ontario Building Code requirements, getting a building permit, and building inspections.

1. Set up a DASH account 
2. Prepare construction drawings such as:
   • Plot Plan
   • Floor plan, elevations, and cross section
   • Spatial separation calculations
   • Mechanical design
   • Energy efficiency design summary form
   • Schedule 1 designer form
   • Engineering for foundation (where applicable)
3. Completed your permit application in DASH and upload your construction drawings.
4. Check for an email notification verifying acceptance of your application and the applicable permit fees. 
5. Wait to hear from a building official, who will issue your permit within 10 business days or request additional information if needed. 
6. Request your building inspection through DASH for the different stages of construction to ensure the work complies with the Ontario Building Code. A building official requires a minimum of 24-hour notice to book the inspection.