Clarington, ON · verified municipal onsite-sewage route

Septic systems in Clarington: approvals, records and property checks

Official local approval and record routes are now linked below. First confirm whether this specific property uses municipal sewer or onsite sewage; the city-wide guide cannot determine a parcel’s service or approve a design.

Before purchaseConfirm sewer or onsite
Permit officeNeeds parcel-specific check
Plan work?Ask regulator first
RecordsFind original files

Check the property’s wastewater service first

No city-level guide proves sewer connection, treatment design or discharge approval for a specific lot.

Connected to sewer

Ask the municipality or utility to verify the specific property’s service and utility account. A municipal connection record does not replace onsite permit or system-condition records.

Open municipal service route →

Onsite system confirmed

Request the Durham Region septic record search and confirm the design/installation permit path with Durham Health before excavation; check municipal sewer connections separately.

Open verified local application route →

Status unknown

Check seller records, utility records, health-authority / building files and the actual parcel before planning alterations.

Confirm septic versus sewer →

Local authority and source route reviewed 14 October 2026. Service status, permit history and applicable design requirements still require a parcel-specific check.

Ontario framework: Ontario Building Code Part 8 governs many onsite sewage systems. The specific authority and records route in Clarington is described next; an approval for one property does not establish approval for another. Ontario provincial guidance →
Verified local office and scope. Clarington’s inspections guidance names Durham Region Health Department as the onsite sewage-system regulator. Durham provides applications for new systems, replacement tanks and repairs, as well as a septic record-search request. Durham notes Oshawa is a different case; do not generalize its exception to Clarington.

Which office handles septic permits in Clarington?

Clarington’s inspections guidance names Durham Region Health Department as the onsite sewage-system regulator. Durham provides applications for new systems, replacement tanks and repairs, as well as a septic record-search request. Durham notes Oshawa is a different case; do not generalize its exception to Clarington.

Records to request before purchase or renovation

  • Property sewer-service confirmation and applicable utility account details.
  • Available as-built site plan, past system permit or filing, inspections and commissioning paperwork.
  • Pump-out, service and maintenance records, plus details of any expansions or reported failures.
  • Site constraints: wells, slopes, flood-prone ground, shoreline setbacks and access for repairs.

When to seek a qualified professional

A design-capacity change, a new dwelling, significant repair, wastewater discharge problem or unknown tank condition can require professional site review and regulator contact. Never enter a septic tank. Stop using affected plumbing if sewage is escaping and obtain qualified assistance.

City-specific source review complete. The official route above identifies Durham Region Health Department for private sewage-system approval in Clarington. This does not establish onsite service, legal use, capacity, setbacks or approval for a particular lot. Check the exact address with the issuing office before relying on any estimate.

Official sources

Ontario law and city-specific official sources

Sources identify relevant official channels, not a septic approval or sewer-service determination for an individual parcel.