Septic installer, Peterborough

Septic installation in Peterborough and the Kawarthas

New systems and full replacements from Millbrook and Keene up through Lakefield, Bridgenorth and Buckhorn to Havelock. Send the form and an owner calls you back today.

  • ✓Same-day callback from an owner
  • ✓Written price after the site visit
  • ✓Installs and replacements only, so the crew that quotes it digs it
Get your free septic quote
A few quick questions. An owner calls you back today.
Prefer to talk? Call (705) 208-7121
32 reviews, every one five stars
Same-day callback
An owner calls you back and books the site visit
Owners on site
One crew. One of the two owners runs every job, every day
Installs and replacements
New systems and full bed replacements. No pump-outs, no patch jobs

Septic installation in Peterborough

Septic installation in Peterborough County now runs through local building departments, since Peterborough Public Health stopped issuing sewage system permits in 2024. We install new systems and replace failed beds from Lakefield and Bridgenorth to Millbrook and Keene, on Shield rock in the north, drumlin clay-till in the middle and sand in the south. We file with whichever office covers your lot and book every inspection.

New septic installation

Building a house, cottage or shop? You get a complete system sized for the bedrooms and fixtures you are actually putting in, designed to pass the inspection the first time.

  • ✓System design and the Part 8 permit application, handled by us
  • ✓Tank, distribution box and leaching bed installed
  • ✓Conventional bed, raised or filter bed, or tertiary unit, whichever the site needs
  • ✓All excavation, imported fill and backfill included
  • ✓Final grading and site restoration

Septic replacement

Old bed failing? Sewage surfacing, slow drains, a health unit order, or a system that predates the property? You get the old tank out and a new system to current Ontario Building Code, with the inspection coordinated for you.

  • ✓Old tank pumped, removed and disposed of
  • ✓Failed drain field, weeping bed or leaching bed excavated
  • ✓New system to current Part 8 code
  • ✓Health unit or building department inspections coordinated
  • ✓Site restored clean when we leave

We install conventional drain fields (weeping beds, leaching beds, tile beds), raised and filter beds where bedrock or the water table is close, and tertiary treatment units such as Waterloo Biofilter and Ecoflo where the lot or the shoreline calls for one.

We install and replace. We do not do pump-outs or minor repairs. If you only need a tank pumped or a baffle fixed, we will point you to someone who does that. If your system has failed or you are building new, we are the right call.

Septic in Peterborough: what changes here

Who issues the permit

Peterborough Public Health stopped issuing sewage system permits in 2024. Cavan Monaghan, Otonabee-South Monaghan and Selwyn took the program into their own building departments on April 1, 2024, and the rest of the county and the City of Peterborough followed by November 17, 2024. Today the Part 8 permit goes through City of Peterborough Building Services inside the city and through each township's building department outside it. We file with the right office and book the inspections.

The ground you are on

Three landscapes in one county. North of Lakefield and around Buckhorn the Shield starts and beds are raised on certified fill. Through the middle the ground is drumlin clay-till that drains slowly, which sizes the bed larger. South toward Millbrook the Oak Ridges Moraine sand drains fast. The test pit at the site visit tells us which of the three you are on.

The rule that shapes the design

Lots near the Otonabee, the Kawartha lakes and Rice Lake carry shoreline and watercourse setbacks that decide where the bed can go. We locate wells, watercourses and property lines at the site visit so the design passes first time.

Communities we cover from here

PeterboroughLakefieldSelwynBridgenorthEnnismoreCavan MonaghanMillbrookKeeneOtonabee-South MonaghanDouro-DummerHavelockNorwoodCurve Lake

How septic installation in Peterborough works, in four steps

1
Tell us what you need
Fill in the form or call. We call back the same business day and book the site visit.
2
An owner walks your property
We look at the lot, the setbacks, the access and the old system if there is one, and we hand you a written price. No dispatcher, no salesperson.
3
We handle the paperwork
Design, the Part 8 permit application, and every inspection. You sign, we file.
4
Install and inspection
Most installs take three to five days on site. The inspector signs off, we grade and restore, and you get the written warranty.

Our equipment, on site

Thor Construction excavator on a Kawartha Lakes site
Thor Construction excavator clearing a lot
Thor Construction crew and equipment on a rural site

What our customers say

★★★★★

“As a custom home builder, we love contracting Thor Construction Company for all of our demolition, excavation and septic work. They are easy to work with, have great equipment and know what they are doing. Our clients are always very happy with them.”

Ethan Bender
Custom home builder · Google review
★★★★★

“Hired Thor for complete site services including bringing utilities into my new build and digging for foundation. Once the build was complete they came back and finish landscaped the property and we couldn't be happier. Strongly recommend!”

Robert Bell
New build, site services · Google review
★★★★★

“Thor Construction Company came in and trenched all new water lines for us when our well line burst. They installed new yard hydrants for us as well. We are so grateful they came in and fixed our water line problem promptly and professionally.”

MDL
Rural property, water lines · Google review

Septic installation in Peterborough: your questions answered

Who issues the septic permit in Peterborough now?

Since 2024 it is the City of Peterborough Building Services inside the city and each township's building department outside it. Peterborough Public Health no longer handles it. We file the application.

Does clay soil mean a bigger bed?

Usually. Slow-draining till needs more bed area to treat the same flow, so the test pit and a percolation check size it. We show you the numbers before we price it.

Do you handle the septic permit?

Yes. We arrange the design and file the Part 8 sewage system permit with whichever office covers your property, a municipal building department or the health unit, and we book every inspection.

How much does a new septic system cost?

A conventional system for a typical home in Central Ontario runs about $15,000 to $30,000. Raised beds, tertiary units and difficult access push it higher. You get a written price after the site visit.

How long does an installation take?

Three to five days on site for most systems. Add the permit lead time in front of that, which we manage and keep you posted on.

How do I know my septic system is failing?

Sewage surfacing or a wet, spongy patch over the bed, slow drains through the whole house, gurgling, sewage smell outside, or an unusually green strip of lawn over the bed. If you see any of these, call. If it needs replacing we will tell you straight, and if it only needs a repair we will send you to someone who does repairs.

Do you install raised beds and tertiary systems?

Yes. Where bedrock, a high water table or a small lot rules out a conventional bed, we install raised and filter beds and tertiary treatment units such as Waterloo Biofilter and Ecoflo.

Can you install in winter?

Often, depending on frost depth and access. Frozen ground costs a bit more. If your system has failed and cannot wait for spring, call and we will tell you whether your site works in winter.

Other areas and services

Every page has the local permit office, the ground and the rules for that area.

Septic installation in other towns

Septic installationin Barrie→Septic installationin Orillia→Septic installationin Gravenhurst and Bracebridge→Septic installationin Huntsville→Septic installationin Lindsay and Kawartha Lakes→Septic installationin Bobcaygeon and Fenelon Falls→Septic installationin Cobourg and Port Hope→Septic installationin Buckhorn and Trent Lakes→Septic installationin Coboconk, Norland and Kinmount→Septic installationin Omemee, Bethany and Pontypool→Septic installationin Lakefield, Bridgenorth and Ennismore→Septic installationin Millbrook and Cavan Monaghan→Septic installationin Apsley and North Kawartha→Septic installationin Minden and Minden Hills→Septic installationin Wilberforce and Highlands East→Septic installationin Beaverton, Cannington and Sunderland→Septic installationin Port Perry and Scugog→Septic installationin Georgina, Sutton and Keswick→Septic installationin Mount Albert and East Gwillimbury→Septic installationin Oro-Medonte→Septic installationin Warsaw and Douro-Dummer→Septic installationin Keene and Otonabee-South Monaghan→Septic installationin Bewdley, Gores Landing and Rice Lake→Septic installationin Bowmanville, Newcastle and Clarington→Septic installationin Haliburton and Dysart et al→Septic installationin Norwood and Havelock→Septic installationin Uxbridge→Septic installationin Campbellford and Trent Hills→Septic installationin Stouffville→Septic installationin Oshawa, Whitby and Brooklin→Septic installationin Pickering and Ajax→Septic installationin Markham→Septic installationin Newmarket, Aurora and King→Septic installationin Bradford West Gwillimbury→Septic installation, every areaThe service page→

Ready to get your septic sorted, Peterborough?

Send the form and an owner calls you back today. Or call now and talk to the person who will dig the job.

Get your free septic quote
A few quick questions. An owner calls you back today.
Prefer to talk? Call (705) 208-7121
Thor Construction Company
Bobcaygeon, Ontario · Serving Central Ontario, north of the GTA
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