Permits in Ottawa
When a backyard shed, deck, or fence needs a building permit in Ottawa, Ontario, with the size cut-offs, coverage level, and source link.
Coverage
Municipal rule
Shed
A one-storey detached storage shed of 15 square metres or less, ancillary to the home and without plumbing, needs no building permit. Keep it at least 0.6 m from side and rear lot lines.
Deck
An independent deck needs a permit when its walking surface is more than 10 square metres and more than 600 mm (about 24 in) above grade. Lower or smaller decks generally do not, but zoning setbacks still apply.
Fence
Fences need no building permit; the fence bylaw sets height limits. A pool enclosure has its own permit and inspection.
The provincial baseline
Under the Ontario Building Code, a detached one-storey storage shed of 15 square metres (about 160 square feet) or less, with no plumbing, does not need a building permit. Anything larger, with plumbing, or attached to another building does. Zoning rules (setbacks, height, lot coverage) always apply even when no building permit is needed.
Ottawa permit questions
Do I need a permit to build a shed in Ottawa?
A one-storey detached storage shed of 15 square metres or less, ancillary to the home and without plumbing, needs no building permit. Keep it at least 0.6 m from side and rear lot lines. Source: Ottawa building department, last checked 2026-06-24.
Do I need a permit for a deck in Ottawa?
An independent deck needs a permit when its walking surface is more than 10 square metres and more than 600 mm (about 24 in) above grade. Lower or smaller decks generally do not, but zoning setbacks still apply.
Do I need a permit for a fence in Ottawa?
Fences need no building permit; the fence bylaw sets height limits. A pool enclosure has its own permit and inspection.
Source
From Ottawa building department, last checked 2026-06-24. Ottawa publishes a clear do-I-need-a-permit series; the deck rule there is the official one. Confirm setbacks with a Development Information Officer.
This is a plain-language explainer, not legal or professional advice, and not the bylaw itself. Rules change and vary by zone within a city. Always confirm with your municipality's building department and the linked official page before you build. Decks and sheds near a conservation authority's regulated area may need a separate permit.
Other municipalities: Addington Highlands, Adelaide-Metcalfe, Adjala-Tosorontio, Admaston/Bromley. Or see every municipality.