What does legal non-conforming mean for a house I want to buy in BC?

What the answer means

Two kinds are treated apart: a use the zone no longer allows (a second home, a shop, a duplex in a one-home zone), and a building whose siting or size no longer fits (too close to the line, too tall) while its use still conforms.

A use that no longer conforms

If land or a building was lawfully used when a land use bylaw was adopted, and the use doesn't conform to it, the use may continue (Local Government Act s. 528 (1)); a building lawfully under construction then counts as existing and in use for what its permit allowed (s. 528 (4)). It can't be carried on at a larger scale or extent than when the bylaw was adopted (s. 530).

Six months unused

If the non-conforming use stops for 6 months in a row, any later use must follow the bylaw (s. 528 (2)). Seasonal and farm uses aren't stopped by normal seasonal, market or production cycles, pest and disease control or required equipment work (s. 528 (3)).

Damage of 75% or more

A building whose use doesn't conform, damaged or destroyed to 75% or more of its value above its foundations as the building inspector finds it, may be repaired or rebuilt only for a use the bylaw allows (s. 532 (1)). While the use continues, no structural alteration or addition may be made to it unless an enactment requires it or the board of variance allows it (s. 531).

A building that no longer fits

Where the use and density conform but the siting, size or dimensions of a building built before the bylaw don't, it may be maintained, extended or altered only so far as the work adds no further breach than there was when it started (s. 529). The Act's 75% rule is written for a non-conforming use, not for siting alone (our reading; ask the council how it applies its bylaw).

A sale doesn't end it

A change of owners, tenants or occupants doesn't, by itself, change the use (s. 534), so the status passes to a buyer.

Never lawful, never protected

The protection covers only what was lawful when the bylaw came in. A suite, addition or use that needed a permit or was never allowed isn't non-conforming; it's unpermitted (see unpermitted work).

When the rules bite

An owner who says a siting or size rule, or the ban on altering a building with a non-conforming use, causes hardship can apply to the board of variance, which may allow a minor variance or an exemption, but never a change of use or density (ss. 540, 542). A development variance permit from the council can vary siting and size too, but not use or density (s. 498).

What it means for a buyer

Non-conforming status is a fact the council confirms, not one on the title or an open map. It bears on what you can add, whether a second home or suite may stay, and what can be rebuilt after a fire. Insurers' rebuild terms differ; we haven't read them, so ask.

Our summary of the Local Government Act (SBC 2015, c. 1, Part 14, ss. 498, 528 to 532, 534, 540, 542), read on BC Laws 2026-10-19. The City of Vancouver works under the Vancouver Charter's own rules, not read here. Whether a building or use is lawful non-conforming is the local government's finding on its records.

Source: Local Government Act, Part 14 (ss. 498, 528 to 532, 534, 540, 542) (summarised in our words, read 2026-10-19).

Before you buy: who to ask

The seller or their agent

When were the house, any suite or second home and any outbuilding built, with what permits? Has any use stopped for a while, or has the house been damaged?

The local government

Is the building, and the use, lawful non-conforming under today's zone? What could be added, and what could be rebuilt after a fire?

Your insurer

If the house burned, would the policy pay to rebuild it as it is, or only as the zone now allows?

Look up the lot above: its report names the zone, our summary of its rules where we have one, and the homes provincial law requires on the lot.

See also setbacks, unpermitted work, suites, rezoning and zoning by place.