Dave thought he was saving money. His cottage near Fenelon Falls had a failing drain field, and a buddy told him he could dig it up and relay the pipes himself over a long weekend. He rented an excavator on a Friday morning. By Saturday afternoon, a neighbour had called the municipality, and Dave was staring at a stop-work order taped to his front door.
No permit. No approved design. No qualified installer. The municipality shut the whole project down, and Dave ended up paying more than double what a proper permitted installation would have cost. He had to hire a designer, submit plans, wait for approval, pay the permit fees, and then start over from scratch.
It’s a story we hear more often than you’d think. And it always starts the same way: someone didn’t realize they needed a septic permit in Ontario.
Here’s exactly when you need one, what the process looks like, and how to avoid the mistakes that cost homeowners time and money.
When You Need a Septic Permit in Ontario
Under Part 8 of the Ontario Building Code, you need a septic system permit any time you’re doing one of the following:
- Installing a brand new septic system on a property that doesn’t currently have one
- Replacing an existing system with a new tank, new leaching bed, or both
- Modifying or expanding an existing system (adding capacity, extending the bed, changing the system type)
- Repairing major components like the distribution pipe network, the leaching bed, or the tank itself
- Converting from a holding tank to a full septic system
- Building a new home or addition that increases the sewage flow to the system
The rule is straightforward. If the work affects how the system treats or disperses sewage, you need a permit. It doesn’t matter whether the property is in Lindsay, Bobcaygeon, or rural Kawartha Lakes. The Ontario Building Code applies across the province, and your local municipality is responsible for enforcement.
In the City of Kawartha Lakes, the Building Division handles all septic permit applications. They review designs, issue permits, and send inspectors to verify the work before the system gets covered up.
Not sure if your project needs a permit? Call us at (705) 242-0330. We’ll tell you straight whether you need one and help you through the process if you do.
When You Don’t Need a Permit
Not every septic-related task requires a trip to the building department. You don’t need a permit for:
- Routine pumping of the septic tank (every 3 to 5 years for most households). See our septic tank maintenance tips for a full schedule.
- Minor maintenance like replacing a damaged riser or lid, fixing a baffle, or replacing an effluent filter
- Septic inspections, including pre-purchase inspections before buying a house
- Landscaping over the leaching bed (though you should never drive heavy equipment over it or plant deep-rooted trees on it)
The line between “maintenance” and “repair” is where most homeowners get confused. Swapping out an effluent filter is maintenance. Digging up and relaying distribution pipes is a repair that needs a permit. When in doubt, call your municipal building department. They’d rather answer a quick question than issue a stop-work order later.
The Permit Application Process
Applying for a septic permit application in Ontario follows a predictable set of steps. Here’s what to expect, whether you’re in Fenelon Falls or Coboconk.
Step 1: Hire a Qualified Designer
Before you apply for anything, you need a system design. In Ontario, septic systems must be designed by a qualified person, either a professional engineer or a registered on-site sewage system installer with design qualifications under the Ontario Building Code.
The designer visits the property, reviews the soil conditions, and creates a plan that meets Part 8 of the Ontario Building Code. This plan shows the tank location, the bed layout, setbacks from wells and water bodies, and the system specs.
Step 2: Get a Site Evaluation
The designer (or a separate evaluator) performs a site evaluation that includes:
- Soil percolation test (perc test) to determine how fast water drains through your soil
- Soil profile to check the depth to bedrock and the water table
- Lot measurements to confirm there’s enough room for the required setbacks
This step is critical. The results determine what type of system your property can support. Poor soils or shallow bedrock may mean a raised bed or tertiary treatment system, which affects both cost and timeline. Our septic system replacement cost guide breaks down pricing for each type.
Step 3: Submit the Application
With the design and site evaluation in hand, you (or your installer) submit the septic permit application to your municipality. In Kawartha Lakes, applications go to the Building Division.
The application typically includes:
- Completed application form
- System design drawings
- Site evaluation report (including perc test results)
- Property survey or lot plan
- Application fee
Step 4: Wait for Review and Approval
The municipality reviews your application to confirm the design meets the Ontario Building Code septic requirements. They check setbacks, system sizing, soil suitability, and lot coverage.
If everything looks good, they issue the permit. If there are problems, they’ll send the application back with comments, and your designer will need to revise the plans.
Step 5: Schedule Installation and Inspection
Once the permit is issued, your installer can begin work. But the job isn’t done when the pipes go in. The municipality requires an inspection before the system is covered up. The inspector checks that the installation matches the approved design, verifies depths and materials, and confirms everything meets code.
Do not backfill until the inspector has signed off. If you cover the system before inspection, the municipality can require you to dig it up. That’s an expensive lesson.
Step 6: Final Approval
After the inspection passes, the municipality issues final approval. Your new (or repaired) system is now on record, legal, and covered by a valid permit. This matters down the road. When you sell the property, buyers and their lawyers will want to see that permit.
What a Permit Costs
Septic permit fees vary by municipality, but here’s what you can expect in Ontario:
- Kawartha Lakes: Permit fees typically range from $500 to $800 for a standard residential septic system
- Other Ontario municipalities: $400 to $1,200 depending on the jurisdiction and system type
These fees cover the application review and the required inspections. They don’t include the cost of the site evaluation, the system design, or the actual installation.
When you add up the full soft costs (design, evaluation, and permit), expect to pay $1,500 to $3,000 before any digging starts. It’s a significant line item, but it’s non-negotiable. Skipping the permit doesn’t save money. It costs more in the end.
How Long Does It Take?
Timelines depend on the municipality and the time of year.
- Site evaluation and design: 1 to 3 weeks
- Permit review and approval: 2 to 6 weeks in most municipalities. Kawartha Lakes is typically on the faster end, around 2 to 4 weeks for straightforward applications.
- Installation: 2 to 5 days for most residential systems
- Inspection and final approval: Usually within a week of requesting the inspection
Total timeline from first phone call to a working, approved system: 6 to 12 weeks in most cases.
Summer is the busiest season. If you’re planning a septic replacement at your cottage, start the process in early spring. Waiting until July means competing with every other cottage owner in the Kawarthas for designer and installer availability.
Ready to get started? Call (705) 242-0330 or book online. We handle the design, permits, and installation so you don’t have to chase paperwork.
Common Permit Mistakes
We’ve seen homeowners and even some contractors trip up on these. Don’t be one of them.
Starting Work Before the Permit Is Issued
This is the big one. Lisa and her husband bought a place near Coboconk and hired a contractor who said he’d “take care of the permit.” He started digging before the application was even submitted. The municipality caught it during a routine patrol, issued a stop-work order, and the couple had to pay a reinspection fee on top of the original permit cost. The contractor’s “shortcut” added three weeks and over $2,000 to the project.
Always confirm the permit is issued and posted on site before any excavation begins.
Using an Unqualified Designer
The Ontario Building Code septic requirements are specific about who can design a system. Not every contractor is qualified to do design work. If the design isn’t stamped or signed by a qualified person, the permit application gets rejected. That’s wasted time and money.
Ignoring Setback Requirements
Part 8 of the Ontario Building Code specifies minimum distances from the septic system to wells, water bodies, property lines, and buildings. Trying to squeeze a system into a space that doesn’t meet setbacks will get your application denied. A qualified designer accounts for this from the start, but homeowners who try to DIY a layout often miss these requirements.
Not Disclosing the Full Scope
If you’re replacing a system and also adding a bedroom or a secondary suite, the sewage flow calculation changes. The system needs to be sized for the new demand, not the old one. Leaving out the addition from your application can result in a system that’s undersized and non-compliant.
Forgetting About the Inspection
The permit isn’t just permission to install. It includes mandatory inspections. Skipping the inspection or burying the system before the inspector arrives means the work is technically unapproved. That can cause serious problems when you sell the property, refinance, or need insurance coverage. Learn more about the rules in Kawartha Lakes.
FAQ
Do I need a septic permit to replace my septic tank in Ontario?
Yes. Replacing a septic tank requires a permit under Part 8 of the Ontario Building Code. Even if you’re only replacing the tank and not the leaching bed, the municipality needs to review and approve the work. A qualified installer will handle the permit application as part of the project.
How much does a septic permit cost in Ontario?
Permit fees range from $400 to $1,200 depending on your municipality and the type of system. In Kawartha Lakes, expect $500 to $800 for a standard residential permit. This doesn’t include design or site evaluation costs, which typically add another $1,000 to $2,000.
Can I install my own septic system in Ontario?
Technically, a property owner can install their own system, but the design still needs to come from a qualified designer, and you still need a permit and inspections. In practice, most homeowners hire a licensed installer because the work requires specialized equipment, knowledge of code requirements, and experience with local soil conditions. A mistake during installation can mean a failed inspection and costly rework.
What happens if I install a septic system without a permit?
The municipality can issue a stop-work order, require you to remove the unpermitted work, and mandate a new permitted installation from scratch. You may also face fines. When you sell the property, a buyer’s lawyer will flag the missing permit during their title search, and it can delay or derail the sale entirely. An unpermitted system can also void your home insurance coverage for sewage-related damage.
Get Your Septic Permit Done Right
The septic permit process in Ontario isn’t complicated, but it is mandatory. Skipping it creates legal, financial, and practical problems that far outweigh the cost and time of doing it properly.
If you’re planning a new installation, replacement, or major repair anywhere in Kawartha Lakes, we handle the full process. Site evaluation, design, permit application, installation, and inspection. One contractor, one phone call, no loose ends.
Call (705) 242-0330 or book your consultation online to get started.