Additional Residential Units

ARUs are separate units with their own kitchen, bathroom and sleeping area(s). ARUs are different from other residential uses because they are clearly secondary to the main dwelling on the property in terms of use and appearance. ARUs come in a variety of forms including granny flats, in-law suites, secondary suites, basement apartments, coach houses and tiny homes. Up to three (3) units on each residential lot including the primary unit may be permitted subject to compliance. They can be located in a main dwelling including a single-detached, semi-detached or townhouse dwelling, and/or in a detached structure like a garage.

Below are graphic examples of ARUs: 

If your property is serviced by municipal water and sanitary sewers, no planning approval is required to establish an ARU provided you can meet all zoning requirements.

If your property is not serviced by municipal water and sanitary sewers, an Application for Zoning By-law Amendment is required. Should Council pass a Zoning By-law Amendment to permit an ARU, their decision is final in that there is no right of appeal to the Ontario Land Tribunal.

To establish an ARU, you will need a building permit from the Municipality.

You will also need a permit from the Electrical Safety Authority (ESA). A permit from the Conservation Authority may also be required should your property be located in a regulated area.