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 under these conditions:

Size and Height Limits:

• Maximum 108 square feet (10 m²) floor area


• Maximum height of 10 feet (3 meters)


• Single storey only

Location Requirements:

• Must be in your rear yard or interior side yard


• Minimum 3 feet (0.9 m) from any property line


• Minimum 3 feet from your house or other buildings


• Cannot be located in front yard or corner side yard


• Must comply with lot coverage limits (typically 35% total coverage including house)

Construction Standards:

• No permanent foundation required (can be on concrete pads, gravel base, or skids)


• No electrical, plumbing, or heating systems


• Cannot be used for human habitation


• Must be constructed to reasonable building standards

What to Watch For:
Even without a permit, your shed must still comply with zoning bylaws. Some neighborhoods have additional restrictions through homeowner associations or heritage districts. If you're in a newer subdivision, check your subdivision agreement for any additional rules.

When You DO Need a Permit:

• Shed larger than 108 sq ft


• Any electrical work (requires separate ESA permit)


• Permanent foundation or concrete slab


• Attached to your house


• Used for business purposes

Verify Before Building:
Call City of Ottawa Building Code Services at 613-580-2424 to confirm requirements for your specific property. Zoning can vary by neighborhood, and corner lots or properties near parks may have different setback requirements.

Pro Tip for Contractors:
If you're hiring someone to build your shed, ensure they understand Ottawa's zoning requirements. Even permit-exempt structures must meet setback and height rules, and violations can result in orders to relocate or remove the structure.

For current zoning maps and specific property restrictions, check ottawa.ca/building or visit the Building Code Services counter at City Hall.