These are the published rules PropAgent runs today. Each one has a version, an effective date, the exact by-law section it comes from, and the source it was read from. Older versions are kept, never overwritten. Provincial rules run in every Ontario municipality; municipal rules only run inside their own city.
Detached additional residential unit
Mississauga
Additional residential units
MI-ARU-GARDEN v1
A detached additional residential unit (garden suite) on a lot with a detached, semi-detached or townhouse dwelling.
- In force since
- 2023-06-01
- Citation
- Mississauga Zoning By-law 0225-2007 § Part 4.1.4 (Additional Residential Units)
- Confidence
- medium
Detached ARUs need servicing, emergency access and tree-protection review before they can be counted on.
Residential (R) dimensional standards
Mississauga
Dimensional standards
MI-DIM-R v2
Height, coverage and yard standards for Mississauga R zones.
- In force since
- 2026-09-05
- Citation
- Mississauga Zoning By-law 0225-2007 § Part 4, Table 4.1.1
- Confidence
- medium
Streetscape and infill provisions can further limit height and coverage on established streets.
Multiple dwelling (RM) dimensional standards
Mississauga
Dimensional standards
MI-DIM-RM v1
Height, coverage and yard standards for Mississauga RM zones.
- In force since
- 2023-01-01
- Citation
- Mississauga Zoning By-law 0225-2007 § Part 5
- Confidence
- medium
RM zones are frequently site-specific; verify the exception schedule for the parcel.
Residential parking minimums
Mississauga
Parking
MI-PARK-RES v1
Minimum resident parking for low-rise residential dwellings in Mississauga.
- In force since
- 2023-01-01
- Citation
- Mississauga Zoning By-law 0225-2007 § Part 3, Table 3.1.2.1
- Confidence
- medium
Additional residential units are exempt from providing a separate parking space.
Low-rise residential permitted units
Mississauga
Permitted uses
MI-USE-LOWRISE v1
Detached, semi-detached and townhouse dwellings in Mississauga residential zones, with additional residential units permitted subject to the ARU provisions.
- In force since
- 2023-01-01
- Citation
- Mississauga Zoning By-law 0225-2007 § Part 4
- Confidence
- medium
Exception zones (suffix -1, -2, …) can change the permitted unit count; confirm the exact zone schedule.
Provincial three-unit floor
Province of ON
Provincial overrides
ON-PROV-3UNITS v1
The Planning Act permits up to three residential units as-of-right on most fully serviced urban residential lots.
- In force since
- 2022-11-28
- Citation
- Planning Act s.16(3) § 16(3)
- Confidence
- medium
This is a floor, not a ceiling: a municipality may permit more, never fewer.
Garden suite
Toronto
Additional residential units
TO-ARU-GARDEN v1
A garden suite is permitted in the rear yard of a low-rise residential lot with sufficient depth and access.
- In force since
- 2022-02-02
- Citation
- 569-2013 § 150.8.20
- Confidence
- medium
A 1.0 m soft-landscaped emergency access path from the street is mandatory and is the most common reason garden suites fail.
Laneway suite
Toronto
Additional residential units
TO-ARU-LANEWAY v1
A laneway suite is permitted only on a lot abutting a public laneway and meeting separation rules.
- In force since
- 2018-06-28
- Citation
- 569-2013 § 150.8.10
- Confidence
- medium
Emergency access, tree protection and servicing distance can still block a laneway suite on a qualifying lot.
Low-rise residential dimensional standards
Toronto
Dimensional standards
TO-DIM-LOWRISE v1
Typical height, coverage and setback envelope for RD, RS and RT zones under By-law 569-2013.
- In force since
- 2013-05-09
- Citation
- 569-2013 § 10.10.40, 10.20.40, 10.40.40
- Confidence
- medium
Zone label suffixes on the individual parcel can override these figures; confirm the exact zone label before design.
Multiple dwelling (RM) dimensional standards
Toronto
Dimensional standards
TO-DIM-RM v2
Typical envelope for RM zones under By-law 569-2013.
- In force since
- 2026-09-05
- Citation
- 569-2013 § 10.80.40, 15.10.40
- Confidence
- medium
R and RM zones carry site-specific exceptions far more often than RD; treat as a starting envelope only.
No minimum resident parking
Toronto
Parking
TO-PARK-NOMIN v1
Toronto removed minimum resident parking requirements city-wide for new residential development.
- In force since
- 2021-12-16
- Citation
- 89-2022 § 200.5
- Confidence
- medium
Accessible and bicycle parking requirements still apply to larger buildings.
Up to four units city-wide
Toronto
Permitted uses
TO-USE-MULTIPLEX4 v1
Multiplex amendment permits two, three and four unit dwellings in all residential zones.
- In force since
- 2023-05-10
- Citation
- 89-2023 § 150.8
- Confidence
- medium
Four units is the as-of-right ceiling; the built form still has to fit the dimensional envelope.
