Septic installer, Newmarket, Aurora and King

Septic installation in King, Aurora and Newmarket

New systems and bed replacements on moraine lots around King City and Nobleton, farm properties near Schomberg and Kettleby, and the rural edges of Aurora and Newmarket. Send the form and an owner calls you back today.

Get my free quote
Call (705) 208-7121
★★★★★5.0from 32 Google reviews
  • ✓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 Newmarket, Aurora and King

Septic installation in King, Aurora and Newmarket runs through each municipality's own building division, and most of the work is in rural King, where 66 per cent of the township sits on the Oak Ridges Moraine. We install systems for new homes and replace failed beds around King City, Nobleton, Schomberg, Kettleby and Pottageville, and on the country lots at the edges of Aurora and Newmarket. An owner is on every job, with excavators we own and the permit package filed for you.

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 Newmarket, Aurora and King: what changes here

Who issues the permit

King Township's Building Division issues the permit for a new septic system and for any repair, upgrade or material alteration of an existing one. Its application guide calls for a site evaluation on every new or replacement system, with at least three percolation tests or a soil engineer's grain size analysis to set the soil's T-time, and a scaled site plan showing wells, watercourses and lot lines. King does not accept the application until applicable law is met, which can mean an LSRCA or TRCA permit first. Aurora and Newmarket issue on-site sewage permits through their own building divisions. We prepare and file the package.

The ground you are on

The Province describes the Oak Ridges Moraine as the divide between rivers draining south to Lake Ontario and north to Lake Simcoe, and lists its sand and gravel among its resources. King City sits on it. Township mapping notes dry sandy moraine soils in the Maple Uplands south of King City and kettle lakes north of Nobleton, while the King edge of the Holland Marsh around Ansnorveldt is poorly drained organic peat. Fast sand and wet peat call for very different beds, so the test pits come before the design.

The rule that shapes the design

King's mandatory septic maintenance inspection program, in effect since January 1, 2016, covers systems within 100 metres of rivers, streams, lakes or ponds in the Lake Simcoe watershed that flow in an average year. Those systems are inspected every five years; the Township does the first visual inspection at no cost, or the owner hires a qualified contractor and sends in the report. Aurora runs the same Building Code program for its streams and three source water vulnerable areas. A new bed near a creek is built expecting that visit.

Communities we cover from here

NewmarketAuroraKing CityNobletonSchombergKettlebyPottagevilleAnsnorveldtLloydtownLaskaySnowball

How septic installation in Newmarket, Aurora and King 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 Newmarket, Aurora and King: your questions answered

Who issues septic permits in King Township?

The Township of King's Building Division, for a new system and for any repair, upgrade or material alteration. Applications go in online with the designer's forms, the site plan and the soil results, and King holds them until any LSRCA or TRCA approval is in place. We prepare and file the package for you.

Is my Aurora septic system in the mandatory inspection area?

Possibly. When Aurora set up its program in 2016, staff counted 467 known sewage systems in town and 127 properties in the mandatory area, near Lake Simcoe watershed streams or inside three source water vulnerable areas. Those are inspected every five years. When a bed fails, we replace it.

Does Newmarket check private septic systems?

Yes. Newmarket's 2026 building fee schedule includes a provincially mandated private sewage system review: owners send in third party review certificates and proof of regular maintenance at no Town fee, and charges apply to owners who do not respond. We replace systems that fail the review.

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 Peterborough→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 Bradford West Gwillimbury→Septic installation, every areaThe service page→

Other work near Newmarket, Aurora and King

Excavationin Georgina, Sutton and Keswick→Landscapingin Georgina, Sutton and Keswick→Excavationin Mount Albert and East Gwillimbury→Landscapingin Mount Albert and East Gwillimbury→Excavationin Markham→Landscapingin Markham→Excavationin Stouffville→Landscapingin Stouffville→Demolitionin Georgina, Sutton and Keswick→Demolitionin Mount Albert and East Gwillimbury→Demolitionin Stouffville→Demolitionin Markham→Excavationin Newmarket, Aurora and King→Landscapingin Newmarket, Aurora and King→Demolitionin Newmarket, Aurora and King→Shoreline restorationon Lake Simcoe south shore→Every area we coverMap and full list→

Ready to get your septic sorted, Newmarket, Aurora and King?

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

Call (705) 208-7121
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
  • (705) 208-7121
  • jp@thorconstruction.ca
  • Bobcaygeon, Ontario

Services

Septic installation

Excavation

Landscaping

Hardscaping

Shoreline restoration

Demolition

Service areas

Bobcaygeon and Fenelon Falls

Lindsay and south Kawartha Lakes

Buckhorn and Trent Lakes

Peterborough and the Kawarthas

Haliburton and Minden

Orillia, Severn and Ramara

Barrie and South Simcoe

Muskoka: Gravenhurst, Bracebridge and Huntsville

Cobourg, Port Hope and Northumberland

Durham: Oshawa, Whitby, Pickering, Ajax, Clarington, Uxbridge and Port Perry

York: Markham, Stouffville, Newmarket, Aurora, King and Georgina

All service areas

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