In Ontario, a 10×16 shed (≈14.9 m²) usually falls below the 15 m² threshold for a building permit, but zoning bylaws (setbacks, height, lot coverage) still apply. In Quebec, rules vary by municipality, many require permits for structures over 10–12 m². In British Columbia, most municipalities require permits if the shed is larger than 10 m² or if it has plumbing/electrical. Always confirm with local building and zoning offices before ordering.