Complete Septic Systems.
Designed. Permitted. Installed.
Slegh Septics provides complete septic system design and installation throughout Southern Ontario. From site evaluation and permits to excavation, tanks, treatment systems, leaching beds and final installation — we manage the entire project.
One Contractor From Start To Finish
A typical septic project can involve a designer, the municipality or approval authority, an excavator, a septic installer, a tank supplier and multiple inspections. Coordinating all of it usually falls on the property owner.
You shouldn't have to coordinate five different companies to install one septic system.
Slegh Septics manages your project from design and permitting through excavation and final installation — one team, one point of contact, one schedule.
Start Your Septic ProjectComplete Septic Services
Design, permitting, excavation and installation for residential, agricultural and commercial properties across Southern Ontario.
Complete Septic Installation
Turnkey septic systems for new homes, rural builds, additions and challenging sites — tanks, treatment, distribution and leaching bed.
Learn MoreSeptic Design & Permits
The right system starts with a proper design and the correct permit documentation prepared for the appropriate approval authority.
Learn MoreSeptic Replacements
Replacement of aging or failing systems, leaching beds and septic tanks — assessed for what the property actually needs today.
Learn MoreAdvanced Treatment Systems
Tertiary and advanced treatment applications for restricted lots, difficult site conditions and higher daily design flows.
Learn MoreCommercial Septic Systems
Higher-flow and commercial sewage systems for shops, agricultural buildings, developments and properties off municipal sewer.
Learn MoreExcavation & Site Work
Excavation, trenching, grading, backfill, material placement and trucking — the site work that keeps the whole install in one crew.
Learn MoreQualified & Certified Installer
We're a qualified and certified installer for leading advanced treatment systems — so we can match the right system to your site.
From Property To Completed Septic System
Six stages, one crew. Here's exactly how a Slegh Septics project runs.
Site Evaluation
We evaluate the property, the proposed development and the site conditions — soil, elevations, setbacks, wells, watercourses and available area.
Design
The septic system is designed around the property's daily design flow and requirements, and the components are matched to the site.
Permit
Required drawings and septic documentation are prepared for the appropriate approval process. Requirements vary by property and municipality.
Installation
Our crew handles excavation, tanks, piping, treatment components and septic bed construction — the whole install stays in-house.
Inspections
Required installation inspections are coordinated through the appropriate authority before the system is covered.
Completion
The system is completed and backfilled, and the project moves toward final grading and site restoration as applicable.
Building A Home On Septic?
Bought a vacant rural property, a severed lot or acreage for a custom home? The septic system shapes where you build, what it costs and how your permit moves. Bring us in early.
- Vacant rural property and severed building lots
- Custom homes and acreage
- Septic design coordinated with your build timeline
- One contractor for design, permits and installation
Does Your Septic System Need To Be Replaced?
Systems don't last forever, and property needs change. If you're dealing with any of the below, a replacement assessment is the right first step — we won't try to diagnose your property over the internet.
- Aging system or components at end of life
- Planned addition or increased sewage flow
- Failed inspection or damaged components
- Property redevelopment or a system that no longer fits the property
Difficult Property? There May Be Another Option.
Some sites are tight, wet, or have high design flows where a conventional bed isn't the best fit. Advanced and tertiary treatment systems can reduce the bed footprint or handle conditions a standard system can't — where the site suits them.
- Restricted or small lot sizes
- Difficult soils or site constraints
- Higher daily design flows and commercial properties
- Qualified installer for Waterloo Biofilter, Ecoflo and Eljen systems
Commercial & Higher-Flow Septic Projects
For builders, developers, farmers, contractors and commercial property owners: Slegh Septics is built to assess and install more complex, higher-flow systems for properties that aren't on municipal sewer.
Built To Handle The Whole Project
Complete Project Management
Design, permits, excavation and installation coordinated by one team — you don't chase five trades.
Design + Installation
The people who design the system are connected to the crew who install it. Fewer gaps, fewer surprises.
Modern Equipment
Excavation and site work handled in-house with the right equipment for the job.
Straightforward Communication
Clear scope, clear schedule, clear answers. You'll know what's happening and what's next.
Residential & Commercial
From a single rural home to higher-flow commercial systems — the same disciplined process.
Southern Ontario Coverage
Serving property owners, builders and contractors across the region.
Recent Septic Projects
A look at real Slegh Septics installations across Southern Ontario — complete beds, tertiary treatment and agricultural systems. More project details are added as jobs are documented.
Complete Septic Installation
A complete septic system with a PVC distribution bed built on clear stone, installed from excavation through to the finished bed.
Eljen Leaching System
An Eljen leaching system installed on a rural lot — the geotextile modules and distribution piping set in sand, ready for cover.
Tertiary Treatment System
An advanced treatment installation with tertiary filter units set into a concrete tank — used where a site calls for a higher level of treatment.
Septic Systems Across Southern Ontario
Serving property owners, builders and contractors throughout Southern Ontario — rural and serviced properties alike. Dedicated area pages are added only for regions we genuinely serve.
What Southern Ontario Property Owners Say
Customer Testimonials Will Appear Here
Verified reviews and Google ratings can be added once available. We don't display anything we can't stand behind.
Planning A Septic Project?
Tell us about the property and what you need. We'll review the details and get back to you on the right next step.
- 01Share the property and project details — the more you tell us, the faster we can help.
- 02Attach a site plan, existing septic design or property photos if you have them.
- 03A member of the Slegh Septics team reviews it and contacts you.
Prefer to talk?
(519) 550-1337Complete Septic Systems.
Designed. Permitted. Installed.
Complete septic solutions throughout Southern Ontario — from site evaluation and design to permits, excavation, installation and completion.