Are you looking to convert part of your home to a rental unit? Consider putting in a secondary suite. Secondary suites, also known as basement apartments or accessory units, are self-contained dwellings created by converting part of an existing dwelling or creating a new dwelling.

Apply for a permit

In order to add a secondary suite to your home, and before any work has started, you’ll need to apply for a building permit.

Application forms

You’ll need to submit the following forms:

Construction drawings

Please submit the following construction drawings with your application:

  • Site Plan (sample A-1)
  • Existing floor layouts (samples A-2, A-4 and A-6)
  • Proposed floor layouts (samples A-3 and A-5)
  • Sections and wall/ceiling/fire separation construction details (sample A-7)
  • Elevations showing accessory apartment entrance and egress window (sample A-8 and A-9)
Refer to the sample drawings for specific drawing requirements, including the number of copies for each drawing required. Review our drawing submission guidelines.

Rates and fees

Review our building permit fees to view the rates associated with putting in a secondary suite.

Zoning requirements

Before applying for a permit, make sure that your property is zoned for a secondary suite. Under the Zoning By-law, a secondary suite (basement apartment) must:

  • Be located in a detached single family or semi-linked (attached below grade only) dwelling serviced by municipal water and wastewater services
  • Have three legal parking spaces on the property
  • Be no larger than 85 m² in floor area

Book a building inspection

During the course of building the secondary suite, you must book building inspections, as required, which can be done online at different stages of construction as indicated on your building permit. Typical basement apartment inspections include:

  • Framing
  • Insulation and air barrier
  • Underground plumbing, above ground plumbing and final plumbing
  • Heating rough-in and final heating
  • Final building