A new sewer line is one of the biggest plumbing jobs a property can need, and one where planning matters most. Whether it's for new construction, an addition, a garden suite or replacing a line that's beyond repair, the work has to be sized correctly, sloped properly and inspected before it's buried.
In Markham, sewer installation work requires a permit and City inspection, and the connection to the municipal sewer has to meet City standards. We handle the plumbing side of that process: proper pipe, proper bedding, proper slope and a clean inspection the first time.
Sewer Line Installation Around Markham
New sewer installations in Markham most often come with construction: additions, garden suites, new homes on severed lots in older neighbourhoods. The City's permit and inspection process applies, and the connection to the municipal sewer has to meet City standards — we plan the job around those requirements from day one.
Soil conditions vary across the city, from the clay-heavy ground in the north to fill in newer developments, and that affects bedding and slope. Winter installation is possible but slower in frozen ground, so if your timeline is flexible, spring through fall is the practical window.
Signs You Need Sewer Line Installation
You may need a new sewer line installed when:
- You're building an addition or new structure. Any new building with plumbing needs its own properly sized and permitted connection to the sewer system.
- The existing line has collapsed. A collapsed or severely deteriorated line can't be cleaned or patched — replacement or a new line is the only real fix.
- You're adding a basement apartment. Second suites sometimes require upgrading or rerouting the building sewer to handle the added fixtures correctly.
- The old line is undersized. Older homes sometimes have lines that were adequate for the original house but not for modern water use and added bathrooms.
- Repeated root destruction. When roots have shattered a clay line in multiple places, installing a new seamless plastic line ends the cycle for good.
How We Do It
- 1
Site assessment
We review the property layout, the existing line's path and depth, and the municipal connection point to plan the new route.
- 2
Permits and locates
The work requires a permit, and utility locates are arranged before any digging. We work within the permit and inspection process from the start.
- 3
Excavation
The trench is dug to the planned depth and slope, with care taken around landscaping, driveways and existing utilities.
- 4
Pipe installation
New pipe is laid on proper bedding at the correct slope, with cleanouts installed at accessible points for future maintenance.
- 5
City inspection
The work is inspected before the trench is closed. We schedule and coordinate the inspection as part of the job.
- 6
Backfill and restoration
Once inspection passes, the trench is backfilled in lifts and compacted, and the surface is restored as agreed.
Why Choose Markham Plumbing
A sewer line is buried for decades. We install it so you never have to think about it again.
- Permit and City inspection coordinated as part of the job
- Correct sizing, slope and bedding — the details that decide how long a line lasts
- Cleanouts placed where future plumbers will actually find them
- Utility locates arranged before any excavation
- Clear communication on timing, disruption and restoration
- Camera verification of the finished line
Sewer Line Installation FAQs
Do I need a permit for a new sewer line in Markham?
Yes. Sewer installation work requires a permit and a City inspection before the trench is closed. We build that into the project plan and schedule so it doesn't cause delays.
How long does a sewer line installation take?
A straightforward residential installation typically takes a few days of on-site work, plus time for permits, locates and inspection scheduling. Weather and soil conditions in winter can extend that.
Will my yard and driveway be dug up?
Traditional installation requires a trench along the pipe's path. We plan the route to minimize disruption and discuss restoration before work begins. In some cases, trenchless methods can reduce digging — we'll tell you if your situation suits them.
What pipe material do you use?
Modern installations use PVC or ABS plastic pipe, which doesn't corrode, has smooth walls that resist buildup, and has sealed joints that keep roots out.
Can a new line be installed in winter?
It's possible but slower, since frozen ground is harder to excavate. If the job can safely wait for spring, we'll say so. If it can't, we plan around the conditions.