Glossary / Ontario building rules

What is zoning by-law?

Plain-language definition

A municipal rule set that controls how land and buildings may be used and developed, including matters such as permitted uses, setbacks, height, lot coverage and other site-specific standards.

Make it concrete

Examples

  • A shed may be permit-exempt but still subject to setback and height limits.
  • An addition can require both building-permit review and zoning compliance.
  • A proposed use can be prohibited even if the construction itself could meet the Building Code.

Related terms

Official sources

Ontario — Building permits and zoning
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Mississauga — Accessory buildings and structures
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