Diverse metropolis: An overview of the by-law

Last updated July 7, 2026
Reading time: 2 min

The By-law for a Diverse Metropolis (20-041) was amended on April 1, 2026. The key components of the amended by-law are as follows.

Threshold of 18,000 square metres

Anyone developing a project with a residential floor area greater than 18,000 m² must sign an agreement with the city to contribute to the supply of:

  • non-market housing, including social and non-market affordable housing.
  • family housing.

This obligation applies to new constructions and building transformations.

Definitions: Types of dwellings

Social housing

Any dwelling owned by a non-profit organization, a housing cooperative, a government, a paramunicipal corporation, a public educational institution or university, or a social trust, and geared toward people with special housing needs or low- and modest-income households.

Social housing is generally built through government funding programs, but can also be built outside of these programs.

Non-market affordable housing

Distinct from social housing, this type of housing meets one or more of the following conditions:

  • It is owned by a non-profit organization, a cooperative, a government, a paramunicipal corporation, a public educational institution or a university, or a social trust, in accordance with the conditions set out in the by-law.
  • It is financed by a government, the city or one of their representatives, or completed as part of a program offering affordable property for sale and calling for resale price controls for a minimum period of 20 years.

Family housing

Includes at least 3 bedrooms, with a minimum floor area of 86 m² or 96 m², depending on the area.

Exemption from the by-law

Projects completed through government-run affordable housing programs over a minimum period of 20 years may be exempt from the application of the by-law.

Until December 31, 2026, all office conversions into residential units in Area 1, corresponding roughly to the downtown core, are also exempt from the application of the by-law.

For further details, please contact the Service de la stratégie immobilière et de l’habitation at [email protected]

Developer’s contribution

Contributions vary based on the scope and location of the project and can take various forms, including:

  • Construction of social housing, non-market affordable housing, and family housing as part of a turnkey or design-build project.
  • Transfer of land or a building to the city in exchange for a financial compensation.
  • A financial contribution.

Diverse metropolis: Ways to contribute

Do you have a project?

For any residential real estate project, you must visit the permit counter in the borough where the project will be built. The permit counter staff will help you with the process and answer your questions.

A project form must be completed before beginning the project.

A completed project form is required for all permit applications involving the addition of at least one dwelling unit.

Online service

Would you like to know more about the requirements applicable to your project?

Try our contribution calculation tool.