Does the city fix the sewer line to my house?

The city is only responsible for the sewer line up to your property line — everything from there to your house is your responsibility.

Ottawa's sewer system works like a tree: the city maintains the "trunk" (the main sewer running under the street), but the "branch" connecting your home to that main line is called the building sewer or lateral, and it belongs to you as the homeowner. This is a very common source of confusion, and unfortunately it means unexpected repair bills for many Ottawa homeowners.

The dividing point is typically at the property line or the connection point to the city main. If a blockage or collapse occurs in the city's main sewer line, they will handle it. But if the problem is anywhere along your private lateral — which can run 10 to 30+ feet from your foundation to the street — that repair cost falls on you.

Ottawa-specific context: The City of Ottawa does offer a Sewer Lateral Subsidy Program in some cases, which can help offset costs for certain sewer lateral repairs or backwater valve installations. It's worth checking with the City of Ottawa or your licensed plumber to see if you qualify. Ottawa also has a mandatory downspout disconnection program in many areas, which affects how stormwater connects to the sewer system.

Common warning signs that your lateral may have a problem include slow drains throughout the house, sewage odours, gurgling sounds, or a sewer backup in your basement. Tree roots are a very frequent cause of lateral damage in Ottawa's older neighbourhoods, and a camera inspection ($200–$350) is the best way to know exactly what you're dealing with before committing to repairs.

If you're experiencing sewer issues or want to know the condition of your lateral before a problem strikes, Ottawa Pro Plumbing can run a camera inspection and walk you through your options — including any available city subsidies.