Tools · calculator
Ontario septic cost calculator
Answer four questions and get an indicative planning range in Canadian dollars. The bands are interpolated from published Ontario installer guides for 2026 — conventional systems CAD 15,000–35,000, advanced systems CAD 35,000–65,000 — adjusted for bedroom count, soil and lot constraints. The output is orientation for quote meetings, never a substitute for a site evaluation.
Unsure? Read system types explained first.
Bedrooms, not bathrooms, drive design flow under Part 8.
Indicative planning range
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Planning bands only — not a quote. Real pricing requires a site evaluation and itemised installer quotes. Every dollar figure on this page is CAD.