Do BC's small-scale housing rules let me build a duplex or fourplex on my lot?

This answer covers the law of British Columbia.

Possibly, but it depends on your lot size, your location and your current zoning. A lot zoned only for single-family or duplex use inside an urban containment boundary, or in a municipality over 5,000 people, must allow at least 3 units if it is 280 m² or smaller, and at least 4 units if it is larger.

A lot larger than 280 m² in a municipality or regional district with a population of at least 5,000 must allow up to 6 units if it is near a frequent transit bus stop, meaning a route with a bus at least every 15 minutes on average during set weekday and weekend hours. Secondary suites, garden suites and laneway homes are allowed province-wide in single-family zones where three- to six-unit zoning is not required. Local governments had to update their bylaws by June 30, 2026, unless they applied for an extension.

Exceptions exist. The 3 to 4 unit rule does not apply where the zone already allows three or more dwelling units on the parcel. Land not connected to a municipal or regional district water or sewer system, parcels over 4,050 m², and some heritage-protected land are exempt from the minimum unit counts. Some local governments are still adopting bylaws, so confirm your zoning locally.