A shed or similar structure, including garages, residential greenhouses, boathouses, gazebos, and pool houses/cabanas, that features any of the following:
- A gross area greater than 15 square metres (161.46 square feet) when used for accessory storage purposes. A permit is required for accessory buildings greater than 10 square metres when used for purposes other than storage as per the Ontario Building Code Division C 1.3.1.1.(6). Accessory buildings that do not require a building permit are still required to conform with the provisions in the zoning by-law for accessory structures.
- More than one storey in building height
- Has plumbing (regardless of building size)