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  Tank Replacement
  Application and Process — Tank Replacement

Tank Replacement Application: Replacing your systems tank may be required when your existing tank has failed or when a renovation Application requires an increase in tank size due to addition of fixtures or floor area.

The Process


* Application approval may require submission of additional documentation or revisions to original Application.

Submission of an application to The Ottawa Septic System Office:

  1. Complete and submit an application for a Certificate of Approval (Permit) — click here to see an example. Please note that an official application in triplicate is required and must include one of the following with the property’s legal description:

    • Tax Assessment
    • Title Deed first page
    • Survey/eMAP

  2. An inspector from the Ottawa Septic System Office will review the application. Turnaround time is 5 to 10 business days if all required information has been provided. If approved, a Permit is issued allowing alteration of the Septic System to begin

    • one copy goes to the city building department
    • one copy is kept at the Ottawa Septic System Office
    • one copy is for the applicant

    Note: Applications and their associated Permits are Non-Transferable and expire 12 months from date of approval

  3. During construction, two inspections are completed by the Ottawa Septic System Office:

    • Installation
    • Final grading

  4. Once the final grading inspection is complete and approved, Ottawa Septic System Office will issue a Certificate of Completion. A homeowner package, including a copy of Septic Smart! Understanding Your Homes‘s Septic System and the records associated with your septic system will be mailed to the address noted on the application. Be sure to include your postal code in order to receive this information kit.

    Note: Septic Systems can only be installed by a contractor licensed and registered with the Ministry of Municipal Affairs and Housing (MMAH) as an installer under Part 8 of the Ontario Building Code or the property owner themselves. This excludes systems which include an advanced treatment unit which can only be installed by a licensed installer.

The Inspections

It is the installer and applicant’s responsibility to contact the Ottawa Septic System Office to request inspections at appropriate stages of the project.

Note: Requests for inspection must be made in writing using prescribed request form via fax, email or in person.

Installation Inspection: (allow 3-5 working days)
Once the tank is installed with the components in place, but before it is covered by fill, an inspector must visit the site to verify tank size, separation distances and proper connection. To request an installation inspection, the following must be submitted in advance to the Ottawa Septic System Office:

“As-Built” drawing and components
Tank Receipt

Once the inspector has approved this stage, the tank can be covered and graded

Final grading Inspection: (allow 3-5 working days)
Prior to the final grading inspection and issuing of the Certificate of Completion, the following must be completed:

• The tank must be covered with backfill and topsoil which has been properly graded
• Conditions of the Sewage System Application must be met
• Electrical and alarms must be operational and ESA permit number is required (if applicable)

Note: It is required under the Ontario Building Code to have the lid on the outlet side of the tank to be at grade to allow for servicing to the effluent filter.

Once this inspection and the conditions are met, a Certificate of Completion will be issued. This certificate means the completed installation has been approved and the septic system can now be used. This document is required to obtain an occupancy permit of a dwelling. Some systems may require an additional maintenance contract agreement.

Note: As Built Drawings and Components are required to list the materials used in construction and identifies the installer on record. Drawings provide the actual measurements and cross references to the location of the system as constructed and verifies the installer has followed the purposed design from the approved application.



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