What records explain additional residential units at a Tecumseh home?

Under section 5.2.2, a lot with a detached, semi-detached or townhouse dwelling may have up to two additional residential units, at most one of them in a separate accessory building, and the lot coverage may then be the greater of 45% or the zone's figure. Each unit needs its own exterior entrance, not on a wall facing a street or private road. A detached unit goes in the rear or interior side yard (in the front or interior side yard in the Lake St. Clair Sightlines overlay), at least 1.5 m from the side and rear lot lines (3 m for a two-storey unit with windows facing them) and 3 m from the house, at most 6.5 m high and 100 m², and no more than half the main home, on the house's own sewer and water services.

On an agricultural or unserviced lot, section 5.2.1 allows one additional unit, inside the main home only, at most 50% of its floor area or the whole basement, with services that meet the Building Code. Any unit within a conservation authority's regulated area needs that authority's permit. The Town's notice of the by-law gave 12 October 2026 as the last day to appeal it to the Ontario Land Tribunal. A general permission does not make an existing unit lawful; the building permit and inspections are the records that do.

• Zoning: the Town's page on Zoning By-law 2026-050
• Zoning By-law 2026-050 with schedules: section 5.2 on additional residential units (PDF)
• Notice of the passing of Zoning By-law 2026-050: the date passed, the appeal deadline and the by-law's purpose (PDF)

Extra units allowed is in the free check as a summary of the Town's rule, from our hand-kept table of city rules, and the full report reads the lot's zone where the Town's zoning map is open data we can use; where it isn't, the report's line says where the Town publishes it. Neither is confirmation that a particular unit holds a permit or may be occupied.

Free check: pick “Extra units allowed” See the sample report