How big can I build a shed without a permit in Ottawa?

In Ottawa, you can build a shed up to 108 square feet (10 square meters) without a building permit, provided it meets specific requirements.

The City of Ottawa allows accessory buildings like sheds without permits if they're 108 sq ft or smaller AND meet these conditions:

Size and Height Limits:

• Maximum 108 square feet (10m²) floor area


• Maximum height of 10 feet (3 meters)


• Single storey only

Setback Requirements:

• Must be at least 2 feet from your property line


• Cannot be in the front yard


• Must maintain required distances from your house (typically 3 feet minimum)

Other Requirements:

• No electrical connections (if you want electricity, you need both a building permit and ESA electrical permit)


• No plumbing or gas connections


• Cannot be used as living space


• Must be on your own property


• Cannot exceed lot coverage limits (total of all buildings)

When You DO Need a Permit:
If your shed is larger than 108 sq ft, you'll need a building permit from the City of Ottawa. The permit fee typically ranges from $200-400 for a simple shed, and processing takes 10-15 business days. You can apply online through ottawa.ca/building or call Building Code Services at 613-580-2424.

Important Notes for Ottawa Homeowners:
Even without a building permit, your shed must still comply with Ontario Building Code requirements for structural safety. If you're in a heritage district or have a corner lot, additional restrictions may apply. Some neighborhoods in Ottawa (particularly in the urban core) have specific zoning bylaws that might be more restrictive.

What to Watch For:
Don't let contractors tell you that permits "aren't necessary" for larger structures - anything over 108 sq ft requires a permit in Ottawa. Also, check with your homeowner's insurance about coverage for unpermitted structures.

For verification of current requirements or if your property has unique circumstances, contact City of Ottawa Building Code Services at 613-580-2424 or visit ottawa.ca/building.