Secondary Dwelling Units, By-law No. 2005 - 367 - Effective September 2005, secondary dwelling units, also known as accessory apartments or "in-law suites" are now permitted in all areas of the City with the exception of the former Village of Rockliffe Park. A secondary dwelling unit is a single self-contained, rental apartment with its own kitchen and bathroom. While many are basement apartments, a unit can be created on any floor of the house.
What does the by-law say?
- No more than an amount equal to 40 per cent of the gross floor area of the principal dwelling may be developed for a secondary dwelling unit, except where a basement unit is created, in which case, there is no maximum size. The full basement area can be used.
- A maximum of one unit is permitted in a detached dwelling, one in each half of a semi-detached building and only one for the whole of a duplex dwelling.
- The new unit must be on the same lot as the principal dwelling unit and must not change the streetscape character along the road on which it is located.
- No additional parking space is required, but where a new one is provided, it cannot be located in the front yard. Tandem parking in the existing driveway is permitted.