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Secondary Dwelling Units

  • A Secondary Dwelling Units (2019) information brochure was prepared by the City of Sarnia Community Development Services and Standards Department.
  • A “secondary dwelling unit” is a self-contained residential unit that includes its own entrance, a private sleeping area, kitchen, and bathroom facilities.
  • Secondary units are permitted in single detached, semi-detached, and multiple-attached (townhouse) dwellings that are located in the Urban Residential 2 (UR2), UR3, UR4 or UR5 Zones.
  • Secondary units are permitted in some, but not all, Urban Residential 1 (UR1) Zones.
  • Secondary units shall provide a minimum gross floor area of 35m2 (377 ft2).
  • Secondary units must meet the requirements of the City’s Zoning By-law and obtain necessary approvals, such as a building permit and fire safety inspection.


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This page was reviewed or revised on Tuesday, March 5, 2019 3:10 PM

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255 North Christina Street,
Sarnia, ON N7T 7N2
PH#: 519-332-0330
TTY# : 519-332-2664