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Septic System Installation Across Toronto & GTA
OCM installs septic systems for rural and unsewered properties across King City, Aurora, Newmarket, Kettleby, Schomberg, and the rest of the unsewered GTA. Class 4 conventional, Class 4 raised, and tertiary treatment systems — we handle perc tests, design, permits, excavation, install, and inspection.
Septic Systems We Install
- Class 4 conventional septic system — standard tank + leaching bed for most rural homes.
- Class 4 raised bed — for properties with high water tables.
- Class 4 filter bed — for restricted sites where conventional won’t fit.
- Tertiary treatment (Class 5) — advanced systems for sensitive lots.
- Septic tank replacement — concrete or polyethylene tanks.
- Leaching bed repair / replacement for failing systems.
- Septic system inspections for real estate transactions.
- Holding tanks for cottage properties and irregular use.
Our Septic Process
- Site assessment. We visit, review your lot survey and soil conditions.
- Perc test — qualified septic contractor performs a percolation test to determine soil absorption rate.
- System design by licensed septic designer (BCIN required in Ontario).
- Permit filing with the local conservation authority and municipality.
- Excavation for tank and leaching bed.
- Tank install — concrete or polyethylene, set on level granular bed.
- Leaching bed construction with proper aggregate and distribution.
- Backfill and topsoil restoration.
- Final inspection by municipal building inspector before backfill is closed.
Typical Septic System Costs in the GTA
A complete Class 4 conventional septic system in the unsewered GTA runs $18,000-$35,000 all-in (tank, bed, design, permit, excavation, install, inspection). Raised beds or filter beds for restricted sites $30,000-$55,000. Tertiary treatment Class 5 systems $40,000-$75,000+. Tank-only replacement runs $4,500-$8,000. Septic inspections for real estate $400-$700. Call 416-317-3090 for a job-specific quote.
Why Rural GTA Homeowners Choose OCM for Septic
- BCIN-licensed designer on every install.
- Permit and inspection liaison with conservation authority and municipality.
- Quality tanks — concrete or polyethylene, all meet Ontario Building Code.
- Proper bed construction — no shortcuts on aggregate or distribution.
- Licensed, fully insured, fully insured.
- Free site visits within 24 hours.
- 2-year workmanship warranty; tanks come with manufacturer warranty.
Recent Septic System Installation Projects
Septic System Installation FAQ
Do I need a permit for a septic system?
Yes, always. Ontario Building Code Part 8 requires a permit for any new septic system or significant repair. We file it for you.
How big does my septic system need to be?
Sized by number of bedrooms (not occupants). 3-bedroom home: 3,600 L tank + 75 m² leaching bed typical. 4-bedroom: 4,500 L + 90 m². We size per OBC Part 8.
Where in the GTA do you install septic?
King City, Aurora, Newmarket, Schomberg, Kettleby, Nobleton, parts of Vaughan and Markham (rural pockets), Whitchurch-Stouffville, and most of York Region and the unsewered north GTA.
How long does a septic install take?
From permit-issued to inspection-passed: 1-3 weeks for conventional, 2-4 weeks for raised or filter bed systems. Excavation and install itself takes 3-7 working days.
What’s the lifespan of a septic system?
Tank: 25-40+ years (concrete) or 30-50 years (polyethylene). Leaching bed: 20-30 years with proper care (regular pumping, no flushing wet wipes / grease / chemicals).
How often does the tank need pumping?
Every 3-5 years for a typical family of 4. Single-occupant homes can stretch to 6-7 years. We can recommend a local pumping service.
Related Services
- Excavation Services — Full residential excavation.
- Foundation Waterproofing — Often needed when correcting drainage near septic.
- Trenching — Drain and distribution line trenching.
- Land Grading — Final grade over leaching bed.
- Get a Free Quote — Schedule your on-site visit.
Get Your Free Septic System Installation Quote Today
Call 416-317-3090 or request a free quote online. We’ll visit your property, discuss your project, and have a written quote in your inbox within 24 hours.
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in Toronto? Let’s talk.