What zoning allows secondary suites in Ottawa?

Secondary suites are permitted in R1, R2, R3, and R4 residential zones in Ottawa, with R4 zones offering the most flexibility for rental conversions. Each zone has specific requirements that affect what type of secondary suite you can create and where it can be located.

R4 zones are typically the most suitable for secondary suite conversions because they allow the greatest density and flexibility. These areas were specifically designed to accommodate multiple dwelling types and are found throughout established neighborhoods like the Glebe, Westboro, and many areas along major transit corridors. In R4 zones, you can create secondary suites in the basement, main floor, or upper floors of your home, giving you more options for layout and design.

R1, R2, and R3 zones also permit secondary suites but with more restrictions. In these lower-density residential areas, secondary suites are generally limited to basement locations or specific areas of the home. R1 zones (single detached homes) have the strictest requirements, while R2 and R3 zones (which allow semi-detached and townhomes) offer slightly more flexibility. The key difference is that these zones prioritize maintaining the single-family character of neighborhoods while still allowing homeowners to create rental income.

Regardless of your zoning, all secondary suites in Ottawa must meet specific requirements: minimum unit sizes of 28 square meters for bachelor units and 37 square meters for one-bedroom units, separate entrances (or clearly defined separate access), adequate parking (requirements vary by zone), and proper fire separation with 45-minute rated assemblies between units. The suite must also have its own kitchen facilities, bathroom, and separate utilities where required by code.

Before proceeding with any secondary suite project, verify your specific zoning through the City of Ottawa's online mapping tool or by calling 311. Some properties may have site-specific restrictions or heritage designations that affect what's permitted. The zoning verification is crucial because it determines not only whether you can create a secondary suite, but also influences the design requirements, parking needs, and approval process.

For a comprehensive assessment of your property's secondary suite potential and to navigate the permitting process, contact Justyn Rook Contracting for a free consultation. We specialize in secondary suite conversions throughout Ottawa and can help determine the best approach for your specific zoning and property layout.