The City of Toronto offers free, made-in-Toronto pre-approved building plans for four-unit and six-unit multiplexes. You can use these plans as a starting point for adding housing on your property.
You still need to apply for a building permit if you use one of these plans. A permit can only be issued if your proposed construction meets the Building Code Act, the Ontario Building Code, the City’s zoning bylaw and other applicable laws.
The City issued an RFP for the Pre-Approved Multiplex Plans and LGA Architects was the successful proponent. The pre-approved plans comply with Ontario Building Code and City zoning requirements that apply to the building design itself. Site-specific requirements, including those related to the placement of the building on the property, must still be reviewed as part of the building permit application.
When applying for a building permit, enter the pre-approved plan number on the Application to Construct or Demolish form. You do not need to submit the pre-approved drawing.
Pre-approved building plans require input from a qualified design professional to complete site-specific elements for a building permit application.
If any modifications are made to the pre-approved plan selected, including HVAC or plumbing modifications, the plan will no longer be considered pre-approved, and this process for applying for a building permit will NOT apply. You may apply for a building permit through the regular application process.
In planning your project, you may choose a plan from the following catalogue of designs.
For each plan, you must choose your desired HVAC system.
Simply reference the plan ID and HVAC type (see Mechanical and Plumbing Requirements accordion below) in your building permit application. Where the plan number is so referenced, you will not need to include the plan itself in your building permit application.
| Design Type | Available Plans |
|---|---|
| Fourplex Narrow | |
| Fourplex Wide | |
| Sixplex Narrow | |
| Sixplex Wide |
The following documents need to be attached as a single file and attached as ‘Application Drawings’ in your online submission.
A survey or site plan needs to include:
A lot grading plan needs to include:
A letter is required from each qualified design professional taking responsibility for the pre-approved plans as part of the permit application. The letter must be signed and sealed by the qualified design professional. This will serve as the seal for the permit documents.
Each letter must contain the following elements:
If shoring is required, separate shoring drawings must be submitted. Shop drawings for the non-combustible side wall assemblies, entry platform, exit stair where applicable, and lateral column are also separate submission documents rather than letter content.
The Energy Efficiency Design Summary, plumbing data sheet, window-sprinkler shop drawings where applicable, and Commitment to General Review are separate submission items rather than content of the letter.
| Form Name | Description |
|---|---|
| Application to Construct or Demolish | Building permit application form required for all submissions |
| Energy Efficiency Design Summary – Part 9 Residential
Compliance using prescriptive method Compliance using performance and other acceptable compliance methods |
Required when applying to construct a new Part 9 residential building or an addition to an existing Part 9 residential building, to establish compliance with the energy efficiency requirements stipulated in Supplemental Standard SB-12 of the Ontario Building Code. |
| Infill Public Notice Declaration Form | This is a declaration form to be submitted to Toronto Building in order for the Owner or authorised agent of the owner to request an electronic copy of the Residential Infill Public Notice from Toronto Building |
| Municipal Road Damage Form | Applicant/owner is required to pay a damage deposit as a protection guarantee against damage to the curb, sidewalk, road, public laneway, boulevard and other services as well as tracking mud on City streets, or failing to clear snow and ice from sidewalks while construction is in progress. |
| Tree Declaration Form | Required for all projects where there is a potential for damage to private or City trees. Applicant is also responsible to comply with other tree protection bylaws. |
| Lot Grading for Infill Housing Letter of Undertaking | Required when applying for permits for new housing which are not subject to Sub-division or Site Plan Approval. |
| Declaration Form - Overhead Electrical Conductors | The purpose of this form is to confirm compliance with Article 3.1.20.1 (as may be referenced by 9.1.1.5) of Division B of the Ontario Building Code (“Article 3.1.20.1”), and it shall be submitted with every permit application for the construction of a new building or the construction of an addition to an existing building. The form must be signed by the designer who has prepared the designs in support of the building permit application. |
| 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. |
| The Lot Grading Consultant must issue a final Lot Grading Certificate to Toronto Building upon completion of the final grades during construction. |
When submitting your application online, you can also apply for related demolition, mechanical, plumbing, and drain permits after submitting your building permit application. Please note that to add related permits, you must use the reference number and access code provided in your building permit application confirmation email.
To submit Plumbing, Drain and Mechanical permits associated with the Multiplex permit, please submit all required forms and documentation for these permits online.
The following forms and documents must be provided as part of your Mechanical Permit.
| Form Name | Description |
|---|---|
| Application to Construct or Demolish | Building permit application form required for all submissions |
| 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. |
| Mechanical, HVAC and Plumbing Qualified Design Professional Letter | To be attached as the Application Drawing |
The following forms and documents must be provided as part of your Plumbing Permit.
| Form Name | Description |
|---|---|
| Application to Construct or Demolish | Building permit application form required for all submissions |
| 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. |
| Mechanical, HVAC and Plumbing Qualified Design Professional Letter | To be attached as the Application Drawing |
| Plumbing Data Sheet | If your project includes a plumbing or drain and water service elements please submit a Plumbing Data Sheet with your building permit application. |
The following forms and documents must be provided as part of your Drain Permit.
| Form Name | Description |
|---|---|
| Application to Construct or Demolish | Building permit application form required for all submissions |
| 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. |
| Plumbing Data Sheet | If your project includes a plumbing or drain and water service elements please submit a Plumbing Data Sheet with your building permit application. |
| Mechanical, HVAC and Plumbing Qualified Design Professional Letter | To be attached as the Application Drawing |
To submit an application for a Pre-Approved Multiplex, all required forms and documentation may be submitted through Toronto Building Online Services Application Submission.
A User Guide is available to support your application.
When submitting your application online, you can also apply for related demolition, mechanical, plumbing, and drain permits after submitting your building permit application. Please note that to add related permits, you must use the reference number and access code provided in your building permit application confirmation email.
These permit fees are shown as a Service Index per square metre of proposed work, unless otherwise specified. For full details of permit fee calculation and a complete list of fee rates, please see the Building Permit Fees page.
| Residential Occupancies Permits | Fee (per m², unless otherwise stated)
Effective Jan. 1, 2026 |
|---|---|
| Residential Unit Fee Each new residential unit included in an application |
$56.33/unit |
| All other multiple unit buildings and any other residential occupancies | $18.56 |
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).