Ontario Septic Designer
Your septic permit package,
done right the first time.
Calculations, worksheets, drawings, setback checks and a printable 26-page package — organized the way your township expects. Built by Ontario septic people, for Ontario lots.
T-time = highest of 3 holes
Excavation = bed + 1 ft each side
Pipe = required × 1.20 waste
Six steps. This software is step five.
Something goes wrong. The quotes land between $25,000 and $40,000. The township says permit required. Then you find out Ontario lets homeowners design their own system on their own land. What is left is the paperwork — forms, drawings, calculations, checklists. That is the part this software prints.
Not there yet? Start with the owner-builder guide
Start where you are — the free check takes two minutes:
One tool, three jobs.
Build your own, legally
Ontario homeowners can design and build their own septic on their own land. The hard part is not buying a tank — it is proving the system fits the lot and handing the township the paperwork they expect.
Check before you buy
Water table, bedrock, setbacks, reserve area — the four things that make a rural lot unbuildable for septic. Check them before the offer, not after closing.
Paperwork in minutes
Enter the project once. Generate worksheets, drawings, takeoff and a client-ready PDF. Duplicate a past job and re-price it. Stop formatting forms by hand.
Answer. Check. Print.
Answer the questions
Bedrooms, fixtures, soil layers, T-time, water table, bedrock and setbacks — in the order a permit application asks for them.
The software checks it
Daily design flow, tank size, bed sizing, pass/fail setbacks, a cross-section drawing, material takeoff and cost — all computed from your inputs.
Print the package
A 26-page permit-ready PDF, organized the way your township or health unit expects to receive it.
Ontario Septic Designer does not issue permits. Final approval is by the local building department, health unit, or approval authority.
This is what you print.
Real pages from a sample package — failures included, because a report that never says FAIL is not checking anything.
SAMPLE
SAMPLE
SAMPLE
Start free. Build for $99.99. Go Pro when it pays.
- Estimated daily design flow
- Estimated minimum tank size
- Green / Yellow / Red risk level
- Missing-information checklist
- Everything in the free check
- Worksheets, setback report, cross-section
- Material takeoff + cost & savings
- 26-page printable PDF package
- 90 days · unlimited edits & exports
- Dashboard & saved projects
- Duplicate project for repeat jobs
- Saved price, labour & equipment rates
- Markups & client-ready PDF
- Unlimited plan $149/mo
A septic designer charges $800 to $2,000 for this paperwork. Your local authority still reviews and approves either way.
What owner-builders actually save.
One real bed, priced line by line the way the software does it — including the 20% pipe waste and the 1-foot over-dig on every side that supplier lists always leave out.
Costs are planning estimates only. Actual pricing depends on suppliers, trucking distance, local labour and site conditions.
| Tank + delivery | $4,800 |
| Pipe + fittings | $925 |
| Clear stone | $1,850 |
| Engineered septic sand | $3,600 |
| Fabric + marker stakes | $300 |
| Pump chamber / electrical | $2,500 |
| Excavator + labour | $2,560 |
| Subtotal before HST | $16,535 |
| HST | $2,149.55 |
| Total with HST | $18,684.55 |
| Contractor quote entered | $38,000 |
| You could save | $19,315 |
Turn septic paperwork into a 5-minute PDF.
Enter the project once, then generate worksheets, calculations, soil profile, cross-section, takeoff and a client-ready package. Charge professional design fees. Stop formatting forms.