Permit guideAuroraBuilding PermitsSecond Suites
Second suite and Two-Unit house permits
A Change of Use Permit or Building Permit is required for the existing Two-Unit house and for the creation of a Two-Unit house, and Two-Unit houses shall be registered with the Building Services Division.
The municipality lists what to submit. CodeEase shows what the building code asks of it. See CodeEase →
Check whether you need a permit
- Aurora’s Zoning Bylaw No. 6000-17 permits second suite dwelling units in detached dwellings, semi-detached dwellings and link house dwellings subject to certain zoning provisions.
- (i) Where three (3) or more link house dwelling units are joined, a second suite dwelling unit shall be permitted, provided that the link house dwelling unit is joined only below grade.
- Owners of Two-Unit houses which were in existence after November 16, 1995, or owners proposing to create a Two-Unit house by constructing a second suite dwelling unit are required to comply with the Zoning Bylaw, the Ontario Building Code and the Registration Bylaw No.5429-12.
- A Change of Use Permit or Building Permit is required for the existing Two-Unit house and for the creation of a Two-Unit house.
- Only if your Two-Unit house existed on or before November 16, 1995
Two-Unit houses existing on or before November 16, 1995
- Two-Unit Houses existing on or before November 16, 1995, are grandfathered by the Land Use Planning and Protection Act (Bill 20) and are subject to the requirements of the Ontario Fire Code.
- Owners are required to schedule an inspection with Central York Fire Services by calling (905) 895-9222.
- For information regarding the retrofitting of an existing Two-Unit House, please contact Central York Fire Services.
- Owners are also required to schedule an inspection with the Electrical Safety Authority (formerly Ontario Hydro) at 1 (877) 372-7233.
- Existing Two-Unit Houses shall be registered with the Building Services Division.
- Registration Application for a Secondary or Third Dwelling Unit
Complete the forms2
Prepare your files
All documents/reports/drawing must be provided as separate submittals and saved by proper file naming conventions of (application, architectural, plumbing, structural, foundation etc.).
- Keep filename consistent.
- Avoid the use of characters, symbols, and extra spaces in your filenames. (For example, &, *, {}, <>, _)
- Avoid inappropriate language in filenames.
- All electronic documents, plans and drawings must be submitted in PDF format, version 7 or not be locked, or password protected.
- Plans/Drawings with multiple pages and sets must be combined into a single Electronic Document (PDF format), flattened, and saved as separate submittal.
- Drawings and Specifications must be in black and white only. Full-colour renderings and photos may be submitted, but only as supplements to a sufficient set of plans.
- The scale and page size of the plans/drawings on the PDF must match the scale and page size of the full-sized plans/drawings on paper.
- Documents must be properly labelled.
- File Naming Requirements for Electronic Submission
- If you do not have an electronic copy, you can either request an electronic copy from the designer or have the drawings scanned at a copy centre.
- Plans/drawings must be at a resolution that is easily legible on screen, and the pages must not be skewed.
- Scanned resolutions of 1-bit black and white 300 dpi is usually acceptable. For plans/drawings containing fine lines and detail, 600 dpi resolution is required.
- Do not reduce the scanned document size.
- Scanning documents in full colour is only necessary if it contains photographs.
Submit your application
All applicants including homeowners are required to provide the required information electronically:
- Go to Portal
- Create an account
- Follow the steps to apply and pay for your application
- Send complete application including drawings and application forms to building@aurora.ca
- Payment information will be provided upon receipt of the application
- We also accept permit application submissions through the Building Division email which has a maximum file size of 16mb or on a USB drive in person.
- Upload all the permit application and related drawings and documentation on a USB drive.
- Bring USB drive to Building Division in person
- Provide payment at counter
- A USB drive containing the PDF files must contain only the PDF files for the Building Permit application, and not contain documents that are compressed or zipped.
- Please note all electronic submissions will be reviewed for completeness. Should any items be missing applicant will receive notification through the Portal or by email.
- Note: Missing information or payment may delay the processing time.
- For further information on electronic submission, please email building@aurora.ca or call (365) 500-2081.
Pay the fee
- All application submissions must be accompanied by a payment by either cheque, debit or credit card (Visa or Master Card).
- Permit Fees
Schedule the Electrical Safety Authority inspection
- Owners are also required to schedule an inspection with the Electrical Safety Authority (formerly Ontario Hydro) at 1 (877) 372-7233.
Register the Two-Unit house
- Two-Unit houses shall be registered with the Building Services Division.
- Registration Application for a Secondary or Third Dwelling Unit
- Registration By-law No. 6660-24
- If you have any questions or require additional information, please contact the Building Services Division at (365) 500-2081.
Written from Aurora’s own pages as published on 22 October 2026. The municipality decides what a permit needs: confirm with it before you apply. Legal notice