What records explain additional residential units at a Caledon home?

Section 6.4 of the Town's zoning by-law permits an additional residential unit only on the same lot as a detached, linked, semi-detached or townhouse dwelling. Its Table 6.3 allows up to three additional units in the R1, R2, RT, RM and RMD zones, with one parking space for each, and also lists three for the estate, rural, agricultural and EPA2 zones, where the Oak Ridges Moraine, Greenbelt or Niagara Escarpment plans, the 2024 Provincial Planning Statement or the Bolton Special Policy Area can set a lower number. Units must also meet the Minimum Distance Separation formulae from farm buildings, and a unit in a conservation authority's regulated area must meet the by-law's conservation authority provisions.

The Town's housing page says the zoning now allows four units as of right town-wide, and that every additional unit in Caledon, rented or not, new or existing, is to be registered with the Town, with details still to come. It says a unit may be occupied or rented once final occupancy has been issued and the unit is licensed. A general permission does not make an existing basement apartment lawful; the building permit, inspections and registration are the records that do.

• Housing in Caledon: the Town's page on additional residential units, registration, pre-approved plans and grants
• Zoning By-law 2006-50, Section 6: section 6.4 and Table 6.3 on additional residential units, November 2025 consolidation (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