A new residential sewer line in Canada is priced in two parts: the private pipe from the house to the property line, which typically quotes like open-cut work at about $600 to $2,000 CAD per metre as a 2026 planning estimate, and the municipal connection, whose fees and road work vary widely by city. Septic-to-sewer conversions add tank decommissioning and sometimes a pump.
- "New sewer line" covers three different jobs: replacing an old lateral, servicing a new or infill house, and converting from septic to municipal sewer.
- On an empty lot the pipe work is often cheaper per metre than a replacement, because there is little surface to rebuild.
- Municipal connection fees, road cuts and any charges for extending a main are set locally and can outweigh the pipe cost; get them in writing first.
- A house lower than the main may need a pumped connection, which adds equipment, electricity and maintenance.
01 /What does a new sewer line cost?
The cost of a new sewer line depends on which of three jobs you mean. Replacing a failed lateral on an existing house is covered in sewer line replacement cost. The other two — servicing a new or rebuilt house, and connecting an existing house on septic to a newly available municipal sewer — carry different line items and fees.
| Scenario | Private-side pipe work | Other costs to budget |
|---|---|---|
| Replacement lateral, existing house | $12,000–$35,000 open-cut; $9,000–$30,000 trenchless | Restoration, permit, possible city-side work |
| New service for a new or infill house, open lot | $600–$1,000 per metre when shallow; more when deep | Municipal connection, capping the old service, permits |
| Septic-to-sewer conversion, gravity connection | $600–$2,000 per metre depending on depth and surface | Tank decommissioning, connection fees or levies |
| Septic-to-sewer with a pumped connection | Pipe work as above, often shallower | Grinder pump station, electrical work, servicing |
| Decommissioning a septic tank | $1,500–$5,000 | Pump-out, disposal, crushing or removal, fill |
| Residential grinder pump station | $5,000–$12,000 installed | Dedicated circuit, alarm, periodic service |
The ranges leave out the municipal side because it varies more than anything on your lot. In some places the connection is a modest permit and inspection fee. In others it involves a road cut by a municipal crew or an approved contractor, traffic control and sidewalk restoration. Where a new main has been built past your property, it can include a local improvement charge or frontage levy, sometimes spread over years on the property tax bill.
02 /How is a new house sewer connection priced?
For a new or infill house, the sewer service is usually priced as part of a servicing package — sanitary sewer, water and sometimes storm — often laid in a shared trench from the house to the property line. On an open lot there is no driveway or landscaping to rebuild, so the per-metre rate tends to sit at the low end of open-cut ranges, and the variables become depth, distance to the connection and the municipal work.
| Line item | What it covers | Typical range |
|---|---|---|
| Locates and layout | Utility locates; confirming the connection point and invert (pipe-bottom) depth from municipal records | $0–$500 |
| Trench and pipe, private side | PVC building sewer on bedding at code slope | $600–$1,000/m shallow; $1,000–$2,000/m deep |
| Cleanout | Exterior or interior cleanout for future access | $600–$2,500 |
| Backwater valve | Often required in new homes with basement fixtures below the street sewer | $800–$2,500 in new construction |
| Municipal connection | Tie-in at the property line or main; road or boulevard work | Set locally; $0 to $15,000+ |
| Permits and inspections | Plumbing, right-of-way and connection permits | $150–$2,000+ |
Infill projects add one more item: the existing service. Many municipalities require an old service to be capped or disconnected, or inspected and approved before reuse, when a house is demolished. Reusing an old clay lateral for a new house is rarely wise, and a camera inspection will show whether it is even an option. Confirm the rule with your municipality before demolition — in Calgary, call 311.
Per-metre figures for new work are easier to compare than for replacements, because there is no old pipe, no restoration and usually good machine access. Convert every quote with the method in sewer line cost per foot and the differences between contractors become obvious.
03 /What does converting from septic to municipal sewer cost?
A septic-to-sewer conversion has three parts: a new building sewer from the house to the connection point, decommissioning the old septic tank, and whatever the municipality charges to connect. The pipe work is often longer than a typical city lateral, because houses at the edge of town sit farther from the road, and the septic outlet may leave the house on a different side from the new connection.
- Confirm the connection is available
Ask the municipality where the connection stub is, how deep it is, whether connection is mandatory and by when, and what fees or levies apply.
- Check the elevation
If the lowest drain in the house is below the main, gravity will not work and a pumped connection is needed. The main's invert depth and the height of your building drain answer this.
- Reroute the house outlet
The building drain may need to exit toward the street instead of toward the tank, which can mean interior work under the basement floor.
- Lay the new line
Open-cut is typical for gravity lines. Directional drilling is sometimes used for small pressure lines from a pump, which do not need a steady downhill grade.
- Decommission the septic tank
The tank is pumped by a licensed hauler, then removed, or broken and filled, as provincial private sewage rules and local bylaws require.
- Inspect and document
Keep the permit, the inspection record and the decommissioning paperwork; a future buyer will ask for them.
Provincial rules for abandoning a septic system differ, and some municipalities add their own. Ask the contractor which rules apply and include decommissioning in the same quote, so one party is responsible for the whole conversion.
04 /When does a new sewer line need a pump?
A new line needs a pump when the lowest drain in the house sits lower than the municipal sewer it must reach, or when there is not enough fall over the distance for gravity flow at the slope the plumbing code requires. A grinder pump or sewage ejector in a sealed basin then lifts the waste into a small-diameter pressure line.
Some municipalities that build low-pressure sewer systems supply or specify the pump; others leave it entirely to the owner. Ask who owns and maintains the pump before comparing quotes, because a quote that includes a pump you will not own is not comparable with one that does not.
05 /Is a new drainage line the same as a sewer line?
No. A drainage or storm line carries rainwater, and in some areas foundation drainage, to a storm main or a ditch; the sanitary sewer carries wastewater from fixtures. Many municipalities prohibit connecting foundation drains, sump pumps or downspouts to the sanitary sewer, especially in new construction, because clean water overloads the sanitary system during storms and can back sewage into basements.
If a quote includes a storm service, a sump discharge line or weeping tile, ask for each to be priced as its own line and confirm where each is allowed to discharge. Weeping tile and grading work is priced very differently from sewer work, and bundling them makes quotes hard to compare.
06 /How to get comparable quotes for a new sewer line
- Get the municipal answers first
Connection point, depth, fees, levies, who works in the road, and any deadline to connect. Write them down with the date and a reference number.
- Supply a site plan
Show the house, the drain exit, the septic tank if any, the route and the connection point. Mark trees, driveways and other services.
- Ask for separate lines
Private pipe work per metre, cleanout, backwater valve, pump if needed, decommissioning, permits, municipal work and restoration.
- Compare like with like
Enter each quote in the quote comparison worksheet so missing items turn into questions for each contractor.
When your scope is written, request quotes and include the municipal answers, so every contractor prices the same connection. For who pays for which part of the connection, see sewer permits and who pays, and for backwater protection in an existing home, backwater valve installation cost.
FAQQuestions people ask
How much does it cost to put in a new sewer line?
As a 2026 planning estimate, the private-side pipe for a new sewer line typically quotes about $600 to $1,000 CAD per metre for shallow open-lot work and more when deep. Municipal connection fees and road work are extra and vary widely by city.
How much does it cost to connect to city sewer from septic?
Budget for the new building sewer, septic tank decommissioning of about $1,500 to $5,000, and the municipality's connection fees or levies, as 2026 planning estimates. A pumped connection adds roughly $5,000 to $12,000.
Do I have to connect to the municipal sewer when it becomes available?
Many municipalities require connection within a set period once a sewer main is available, but rules differ. Ask your municipality whether connection is mandatory, by when, and what it costs.
Can I reuse the old sewer line when building an infill house?
Sometimes, if a camera inspection shows it is sound, the right size and an acceptable material, and the municipality approves. Older clay laterals are usually replaced during infill projects.
Who pays for the sewer connection in the street?
It depends on the municipality. Some charge a fee and do the work; some require the owner's contractor to do it under permit; some recover costs through levies. Confirm before budgeting.
Does a new sewer line need a backwater valve?
The National Plumbing Code of Canada and provincial codes generally require backwater protection where fixtures sit below the level of the adjoining street sewer. Your plumbing permit will confirm what applies.
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