What the provincial framework changes
In Ontario, most onsite sewage systems with design capacity at or below 10,000 litres per day are regulated under the Building Code Act. Permits are typically issued by the local municipality or, in some areas, a health unit; larger systems may require provincial environmental approval.
The practical result is that a septic decision cannot be separated from the property record. The applicable authority may need a permit, registration, filing, notification, approval or certified professional depending on the province and project.
Three files worth building
System fileDesign, permit/approval or filing, as-built plan, tank and field location.
Maintenance filePumping, service, alarms, repairs and treatment-unit maintenance.
Property fileWater supply, easements, setbacks, lot changes and future construction plans.
Transaction fileInspection findings, seller disclosures and unresolved defects before closing.
Official source
28 Ontario city-area guides
Barrie, ONBrampton, ONBrantford, ONBurlington, ONCambridge, ONGreater Sudbury, ONGuelph, ONHamilton, ONKingston, ONKitchener, ONLondon, ONMarkham, ONMilton, ONMississauga, ONNiagara Falls, ONNorth Bay, ONOakville, ONOshawa, ONOttawa, ONPeterborough, ONRichmond Hill, ONSault Ste. Marie, ONSt. Catharines, ONThunder Bay, ONToronto, ONVaughan, ONWaterloo, ONWindsor, ON