Which part of the sewer line does a Calgary homeowner maintain?

The clearest published split in Calgary is on the water side. For the sewer, the practical answer comes from a free City of Calgary check that shows whether a blockage sits on private or public property, and that tells you whose repair it is.

What the City of Calgary says about ownership

For the water supply side, the homeowner is responsible for the pipe running from the house out to the service valve, which sits at or near the property line. Repair costs on that stretch fall to the owner; the water meter itself is the City's responsibility.

For a sewer backup, the ownership boundary is less straightforward to pinpoint on your own. The City can send a crew to run a steel snake from the sewer main to find out whether a blockage sits on the private side or the public side, and that assessment is provided at no charge. If the blockage turns out to be on your property, the crew will tell you to call a plumber. City crews will not move furniture, pull back carpet, remove toilets or open drywall, so the follow-up is entirely the homeowner's to arrange.

Keep people away from any sewage that has backed up into the home. Sewage cleanup is not a straightforward DIY job; a professional restoration company handles it properly.

Once a plumber is involved, insist on a camera inspection before agreeing to any repair. A camera run, which typically costs $200 to $600 in Calgary, shows exactly where the problem is, what caused it (root intrusion, a collapsed section, grease buildup, a belly in the line) and how far it extends. That footage also tells you whether a spot repair ($1,000 to $3,000) is realistic or whether a longer trenchless lining, pipe bursting or full dig-and-replace is needed. Trenchless methods generally run $5,000 to $12,000; a full replacement can reach $15,000 or more depending on depth, length and what sits above the line.

For any repair that alters the sewer line, the City of Calgary issues the plumbing permit. A contractor pulls that permit; a homeowner cannot take out a permit for a contractor's work. The City's inspection of the permitted work is your confirmation that it meets the National Plumbing Code of Canada 2020.

Before hiring, ask the plumber for their trade certificate number (plumbing is a compulsory certification trade in Alberta under the Skilled Trades and Apprenticeship Education Act), a WCB-Alberta clearance letter, and their Alberta prepaid contracting licence if any deposit changes hands before the job is finished. Get the scope, price, permit responsibility, disposal and any concrete cutting or patching in writing before work starts.

After the job wraps up, keep the permit, the inspection sign-off, the camera footage and the written contract together in one place; they are worth having if a warranty question comes up or if you sell the house.