Additional Residential Unit Regulations

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Through the More Homes, More Choices Act (Bill 108), the Province of Ontario expanded the requirements and removed barriers for municipalities to permit ‘additional residential units’ (formerly known as second units, secondary suites, accessory dwelling units etc.) in their Official Plans and Zoning Bylaws. Municipalities are now required to permit additional residential units (ARU's) in single, semi-detached and row homes and in an accessory building or structure, totaling three residential units on the property.

The current Official Plan and Zoning Bylaw permit one ARU in either the primary home or within an accessory structure, subject to meeting a number of requirements. The City of Cambridge is now amending the Official Plan and Zoning Bylaw to permit a third ARU on certain residential properties.

What we've done so far:

  • Two virtual public consultation sessions were held on October 21, 2021. If you were not able to join, the video presentation can be found on the right side of the page.
  • Public survey that closed November 13, 2021.
  • Statutory Public Meeting was held on December 14, 2021. You can find the presentation and Council report under the 'Documents' tab.
  • Staff Recommendation Report was approved by Council on March 22, 2022.

What's Next?

The Region of Waterloo is the approval authority for the Official Plan. The new Zoning By-law will take effect, pending Regional approval.


Additional Residential Unit Examples (or accessory dwelling unit)



Through the More Homes, More Choices Act (Bill 108), the Province of Ontario expanded the requirements and removed barriers for municipalities to permit ‘additional residential units’ (formerly known as second units, secondary suites, accessory dwelling units etc.) in their Official Plans and Zoning Bylaws. Municipalities are now required to permit additional residential units (ARU's) in single, semi-detached and row homes and in an accessory building or structure, totaling three residential units on the property.

The current Official Plan and Zoning Bylaw permit one ARU in either the primary home or within an accessory structure, subject to meeting a number of requirements. The City of Cambridge is now amending the Official Plan and Zoning Bylaw to permit a third ARU on certain residential properties.

What we've done so far:

  • Two virtual public consultation sessions were held on October 21, 2021. If you were not able to join, the video presentation can be found on the right side of the page.
  • Public survey that closed November 13, 2021.
  • Statutory Public Meeting was held on December 14, 2021. You can find the presentation and Council report under the 'Documents' tab.
  • Staff Recommendation Report was approved by Council on March 22, 2022.

What's Next?

The Region of Waterloo is the approval authority for the Official Plan. The new Zoning By-law will take effect, pending Regional approval.


Additional Residential Unit Examples (or accessory dwelling unit)



Page last updated: 08 Apr 2022, 09:37 AM