Service Description

Stand-Alone Plumbing Permit for installation of a premise isolation Backflow Prevention Device in an existing building.

Service Outcome

Building Permit

All drawings to be done on standardized sized sheets, drawn to scale, fully dimensioned, signed and dated.

If drawings were prepared by a qualified designer (as defined under Div. C, Part 3, Section 3.2 of the Ontario Building Code), drawings must include the designer’s name, registration number, qualification identification number, signature, and stamp/statement that the person has reviewed and taken responsibility for the design activities.

All drawings, reports, and forms, including the completed Application for a Permit to Construct or Demolish, must be provided in a PDF format.

Plumbing Data Sheet

Required when applying for a plumbing permit relating to plumbing work on private property or within buildings or structures.


Application to Construct or Demolish Form

Building Permit application form required for all submissions


Schedule 1: Designer Information Form

Required for all designers, except Engineers and Architects when applying for any Construction Permit. Property Owners, if exempted, from Qualification / Certification, they must fill-in the form to specify the reason for exemption.


Commitment to General Reviews By Architect and Engineer

Required for all buildings where professional design and field review is required by the Ontario Building Code. This Commitment form must be signed by the owner or agent and the professional architect, engineer, or consultant.

Backflow Prevention Information Templates

Based on site conditions, the following drawings may be used to apply for a plumbing permit for the installation of premises isolation backflow prevention devices.


Premises isolation backflow preventer installation up to 1″ size with thermal expansion relief valve.


Premises isolation backflow preventer installation up to 2″ size with suspended expansion tank.


Premises isolation backflow preventer installation up to 2″ size with floor-mounted expansion tank.


Premises isolation backflow preventer installation up to 2″ size with suspended expansion tank and multiple hot water tanks.

Please note: not all projects are eligible for email submission. Review the list of eligible applications and detailed email submission process.

To submit an application by email please use the ‘Email’ button on top of the Application for a Permit to Construct or Demolish.

Fee Effective Jan. 1, 2024
Backflow Prevention Devices (devices requiring testing) $85.79 each

Protect Your Privacy

Please do not include any personal information on your Building Plans (e.g., the homeowner’s name or phone number). Building Plans submitted for Permit are subject to disclosure in accordance with the Municipal Freedom of Information and Protection of Privacy Act (MFIPPA).