Peterborough: questions buyers ask
What records explain additional residential units at a Peterborough home?
Section 6.33 of the City's Comprehensive Zoning By-law 97-123, added by By-law 23-087 and amended by By-law 25-061, as summarised on the City's additional residential unit pages.
Sources checked October 29, 2026
The rule in Peterborough
Up to 3 homes on a lot
Peterborough zoning by-law 23-087: permits up to two additional residential units with a single unit, semi-detached or street townhouse dwelling, both inside or one inside and one in an accessory building, each with at most two bedrooms and less floor area than the main home; none in a floodway.
From Peterborough by-law 23-087, checked 29 Oct 2026
- The recordAdditional residential units
- Where to read itCreating a new additional residential unit; Additional residential units and 1 more
- The free check reads itPick “Extra units allowed”
What the record shows
Section 6.33.3 of the Zoning By-law permits, with a single unit dwelling, a semi-detached dwelling or a street townhouse dwelling, either two additional residential units inside the house or one inside and one in a residential accessory building. Each unit has at most two bedrooms and less floor area than the main home, must be served by public water and sewers unless the main home is allowed private services, and is not permitted in a floodway; the City's page sends owners to the Otonabee Region Conservation Authority's inquiry page to check a property against the floodway. The section also sets a firefighting access route and a walkway of at least 0.9 metres to the unit, and parking for the main home and the units is counted together under the by-law's parking table.
The City's page on existing units says a unit built after 16 November 1995 is recognised through a building permit and its inspections, and that one in place on that date may be exempt from the zoning rules under Ontario Regulation 384/94 if the owner documents it. The City's dashboard maps the units recognised in 2025 and the rental premises licensed under By-law 17-067. A permission in the zone does not make an existing basement apartment lawful; the permit and inspection records are where that is answered.
Where to read it yourself
- Creating a new additional residential unit: the City's summary of the zoning rules, parking and access
- Additional residential units: the City's page on existing units, permits and the dashboard
- Zoning By-law 97-123, Section 6: supplementary regulations, May 2025, with section 6.33 (PDF)
What OfferDue covers in Peterborough
Extra units allowed is in the free check as a summary of the City's rule, from our hand-kept table of city rules, and the full report reads the lot's zone where the City's zoning map is open data we can use; where it isn't, the report's line says where the City 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
Public-record information, not legal, financial, insurance or inspection advice. Records change and can be incomplete, and this page describes the records, not any particular home. What we cover, city by city.