The City is responsible for the municipal addressing of all structures and properties in our city. A number assigned by the Planning and Development Services Department is considered the official municipal number regardless of any other number assigned by any outside agency or City department.

General Policies

City staff will refer to these applicable policies when assigning new municipal numbering in Sarnia.

  • That one address shall be assigned per legal lot of record, except where otherwise permitted.
  • That the right hand side of a street shall be assigned “Even” numbers, and the left side of the street shall be assigned “Odd” numbers.
  • That a default space for numbering shall be incrementing odd or even numbers for every  20 feet (6 m) of frontage (ex.,  4, 6, 8, 10, or 3, 5, 7, 9).
  • That an area with an established numbering pattern shall continue to use that numbering pattern.
  • That a municipal address shall be assigned to the legal lot frontage determined by the Zoning By-law on corner lots.
  • That more than one municipal address may be assigned for use by tenants or additional buildings erected on one parcel of land, if available, and without requiring a change to the addresses of adjacent properties.
  • That addresses will not be assigned to vacant or severed lands until such time as an application for a building permit has been submitted or the conditions of the approved severance application have been completely fulfilled. In cases where the approval of a consent application creates a situation where the original address now falls out of sequence from the newly created lots, it will have to be renumbered through the request form.

New Development Policies

For assigning new municipal addresses within a new development in Sarnia:

  • Single family dwellings  That dwellings will be numbered by increments of four’s
  • Semi-detached dwellings  That each dwelling will be numbered by increments of two’s with an interval of two between buildings.
  • Street townhomes  That each dwelling will be numbered by increments of two’s with an interval of two between buildings.
  • Quadraplex street townhomes – That the individual dwellings be addressed consecutively based on the location of the driveway frontage.
  • Condominium townhouse, commercial or industrial blocks  That one municipal address be assigned to the Main access driveway for the Condominium Blocks. It is the developer’s responsibility to assign unit numbers for each Condominium unit.
  • Apartment buildings  That one address per apartment building be assigned, and the owner assigns the individual unit numbers as required.
  • Commercial, industrial and institutional sites  That one address be assigned per property, unless it is required to avoid confusion with multiple buildings on a site.
  • City parkland  That parkland properties be addressed based on the location of buildings, structures, parking areas, splash-pads, or playground areas.
  • Utilities  That addresses be assigned to utility facilities for reference purposes in the event of an emergency situation, and a request form has been submitted.

Address Change Requests


Please contact City staff before submitting an application to ensure your proposal is acceptable. If the application is accepted, the applicant will receive a confirmation notice by email. The applicant, if not the owner, is responsible for ensuring the owner receives a copy of this notice for their records.

How do I request an Address Change?

Please use the ‘Order Here’ link below to submit an Address Change Application. The application fee is $425, which is charged once per property.

Order Here

For more information, contact Community Services at 519-332-0330 extension 3301 or email

The City of Sarnia is not responsible for postal codes.
Postal Code Inquiries:
Canada Post Customer Service
Call 1-800-267-1177 or visit