Quick Answer: In Toronto, the cost of replacing a lead water pipe depends mostly on how far the pipe runs from the property line to your house, how it has to be dug or tunnelled, and what has to be restored afterwards. The City replaces its own section of the pipe, but the private section from the property line into your home is the homeowner's cost, so an on-site quote is the only reliable number.
If your home was built before the mid-1950s, there is a real chance the water service that feeds it is lead. Replacing it is one of the most worthwhile plumbing projects a Toronto homeowner can take on, and also one of the least understood when it comes to price. This guide explains what you are actually paying for, so you can compare quotes properly.
Who Pays for What: The City Side and Your Side
A water service in Toronto has two parts. The City side runs from the watermain under the street to the property line. The private side runs from the property line, under your yard, through the foundation, to the main shut-off valve in your basement.
Under the City of Toronto's Priority Lead Water Service Replacement Program, the City replaces its side when the homeowner commits to replacing theirs. The City is clear that the cost of the private side is the homeowner's responsibility. You have two ways to do it:
- Hire your own licensed plumber to replace the private side first, then apply for the City to replace its side. The City asks for proof, such as the contractor's or licensed plumber's invoice.
- Use the City's contractor to replace both sides at the same time, paying for your side. The City itself encourages getting several independent quotes before choosing this route.
The City also recommends replacing both sides together. Cutting into a lead pipe to replace only one section can disturb it and temporarily raise lead levels at the tap.
The Five Things That Drive the Price
No two lead service replacements cost the same, because no two lots are the same. When we quote a lead and galvanized water pipe replacement, these are the factors that move the number.
1. Length of the run. A semi in Cabbagetown with a short front yard needs far less pipe and digging than a detached home in Forest Hill set well back from the street.
2. How the pipe is reached. An open trench across a lawn is the simplest case. Interlock, a paved driveway, mature trees, a front porch or a retaining wall in the path all add time, because the route has to go around, under or through them.
3. Restoration. Someone has to put the yard back. Ask every contractor whether backfill, compaction, sod or interlock reinstatement is included, or whether you are expected to arrange it yourself. This is the most common reason two quotes look far apart.
4. Where the pipe enters the house. Getting through the foundation wall and reconnecting at the main shut-off is straightforward in an open basement. In a finished basement, drywall, flooring or built-ins may need to be opened and closed again.
5. What else is replaced at the same time. Most homes with a lead service also have old galvanized or lead pipe inside. Installing a new shut-off valve and replacing the first section of interior pipe at the same time is common. A full interior repipe is a bigger, separate job.
Signs Your Home Has a Lead Water Service
The City's guidance is that homes built before the mid-1950s are the most likely to have lead service pipes. To check yours:
- Find where the water line enters the basement, usually at the front wall near the water meter.
- A lead pipe is dull grey, does not attract a magnet, and shows a shiny silver mark when scratched gently with a coin.
- Galvanized steel is also grey, but a magnet will stick to it.
- Copper is the colour of a penny.
You can also call 311 to ask the City to check its records for your address, which the City says can take up to 30 business days. A licensed plumber can confirm it on a single visit.
Why It Is Worth Doing Now
Health Canada lowered its maximum acceptable concentration for lead in drinking water to 0.005 mg/L in 2019, and advises keeping lead levels "as low as reasonably achievable" (Health Canada, Guidelines for Canadian Drinking Water Quality: Lead). The water leaving Toronto's treatment plants does not contain lead. It picks lead up from the pipes on the way to your tap, which is why the service line matters.
There are practical reasons too. A new service often improves flow in older homes where corroded or undersized pipe has been choking supply. If low pressure is part of the problem, our water pressure service page explains the other causes worth ruling out.
How to Compare Quotes
When you collect quotes, make sure each one states:
- The pipe material and size being installed
- Exactly where the work starts and ends (property line to main shut-off, or further inside)
- Whether excavation, backfill and surface restoration are included
- Whether a new main shut-off valve is included
- Whether the contractor provides the invoice the City needs for its side
A lower price that leaves out restoration or the shut-off valve is not a lower price.
Get a Lead Pipe Replacement Quote in Toronto
Advanced Plumbing & Drains is a licensed and insured, family-owned plumbing company that has served Toronto since 2005, from The Annex and Leaside to Riverdale and the west end. We will confirm whether your service is lead, walk the route from the property line to your basement, and give you a written quote that spells out what is and is not included.
Learn more about our lead pipe replacement service, or call (416) 769-8800 to book a visit. Same-day appointments are available.