Glossary / Ontario building rules

What is setback?

Plain-language definition

A required distance between a building or structure and a property line, street, another feature or another regulated reference point.

Make it concrete

Examples

  • A shed may need to sit a minimum distance from a lot line.
  • A deck site plan commonly shows setbacks from property lines.
  • A proposed addition can need a variance if it does not meet a required setback.

Related terms

Official sources

Mississauga — Accessory buildings and structures
Open official source
Ottawa — Building permit FAQs
Open official source