Basement Development

You need a building permit for most basement developments, such as adding rooms or finishing washrooms.

For basement suites, which includes most developments with a kitchen or those that are designed for renters or have separate access, please see accessory dwelling unit.

Permit requirements for a basement development

• Building permit application
• Map/drawing of proposed and existing rooms
• Room uses and dimensions
• Details of structural changes, if any
• Locations of smoke and carbon monoxide detectors
• Locations of doors and swings
• Locations and sizes of windows
• Electrical permit application, if applicable
• Plumbing permit application, if applicable
• Gas permit application, if applicable