Can I rent out an in-law suite addition in Ottawa as a secondary dwelling?

Renting out an in-law suite can be possible in Ottawa, but only if the suite is a legal secondary unit and you meet your obligations as a landlord. Before you build, confirm with the City that a secondary unit is permitted on your lot. Ottawa currently has two zoning by-laws in effect (2008-250 and the new 2026-50) while appeals are resolved, so check your property's zone under both.

The building side comes first. The City always requires a building permit for a secondary unit in a house, and the drawings must show the fire-separation wall and floor-ceiling construction between the units. For new construction, that means a 45-minute fire separation, or 15.9 mm (5/8 in) Type X gypsum on both sides of separating walls and on the underside of floor-ceiling framing. Your designer confirms the assembly. Build to the permit and pass the inspections; a suite created without permits can lead to orders to bring it into compliance, and fixing fire separation, exits and electrical after the fact can be costly.

A legal unit is self-contained, with its own entrance, kitchen, bathroom and sleeping area. Electrical work needs an ESA notification or permit by an electrical contractor licensed by ESA, and gas work is done by a TSSA-certified gas technician.

Renting brings its own rules. Residential tenancies in Ontario are governed by provincial law, which covers things like notice, rent increases and how disputes are handled, and some arrangements, such as sharing a kitchen or bathroom with the owner, can be treated differently. Get advice from a lawyer or paralegal before you sign a lease, and check whether the City has any rental licensing or registration that applies to your property.

Tell your insurer before you rent. A rental unit changes your risk, and your policy may need to change with it. Rental income also has to be reported for tax purposes, and an accountant can explain which expenses you can claim.

As for what you can charge, rents depend on the suite's size, finish, location and what is included, so look at current local listings for comparable units rather than relying on a general figure. Building costs vary widely too; ask for itemized quotes.

If you are building the suite so a senior relative or an adult eligible for the disability tax credit can live with family, the CRA's Multigenerational Home Renovation Tax Credit may apply instead. To plan a suite that meets permit requirements from the start, compare quotes from addition contractors in the Ottawa Construction Network directory.

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Looking for experienced contractors? The Ottawa Construction Network connects homeowners with qualified professionals:

• Luxe Painting and Renovations
• RenoMotion Inc.
• MAK Construction and Development Inc
• Renovo Construction
• Capital City Drywall