You may require a building permit if you are renovating your basement. You do not need a permit if:

  • the work does not include structural or material alterations
  • no additional dwelling unit(s) is (are) created (i.e. a second unit) and
  • the work does not include the installation of new plumbing

If you are doing any of the following work a permit is required:

  • structural or material alterations
  • installing or modifying heating and or plumbing systems
  • excavating and/or constructing foundations
  • basement underpinning
  • constructing a basement entrance
  • adding a second suite

More information can be found on the following City of Toronto websites;

When is a Permit Required:

Apply for a Building Permit:

Small Residential Project Guides: