Basement Entrances

Basement Entrances

Basement entrances may come in different forms such a stairs, stairwells, retaining walls to facilitate a below grade entrance, or a side door which provides access to the basement.
Stairwells and Other (362 kb)
Whatever the case may be, there are provisions which apply to most basement entrances which can be found in 4.1.5 Encroachments & Projections.

The basement entrances information sheet on the left outlines the zoning requirements that relate to below grade entrances.
Stairs, stairwells or retaining walls to facilitate an entrance below grade at any point shall not be permitted in front yards or exterior side yards.

The minimum setback of stairs, stairwells or retaining walls to facilitate an entrance below grade to an interior side lot line and rear lot line shall be 1.2 m.


When proposing a basement entrance, you will be asked to clarify if the proposed construction is to facilitate the creation of a second dwelling unit, or if it is to service the existing single family dwelling. In some cases, confirmation by way of an inspection may be required.

You can find more information about second units here.

If the proposed construction is to service the existing dwelling only, we may ask you to complete a Single Dwelling Unit Information Letter. This letter affirms that the scope of the building permit application does not include the proposal of a second unit or lodging house, and that the property does not currently contain more than (1) dwelling unit.



Any information contained herein is strictly for information purposes only and should be reviewed in conjunction with Zoning By-Law 0225-2007, as amended. In the case where the information provided conflicts with that of the text contained in Zoning By-law 0225-2007, as amended, the text shall prevail. It should not be relied on when making decisions in connection with real estate transactions, development proposals or building permits.

Please visit the Mississauga Civic Centre, between 8:30 a.m. and 4:30 p.m. to review the Official Zoning By-law and to speak with staff before making important decisions.

A list of amendments passed by Council but not yet incorporated into the office consolidation copy can be found on the Unconsolidated Zoning By-law Amendments document. 

Copies of Zoning By-law Amendments are available at:
Office of the City Clerk
Corporate Services Department, 2nd Floor.

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