Permission first. Construction second.

Duncan amended Zoning Bylaw 3166 to allow up to four units in its Low Density Residential district.

Main home

Secondary / ADU

One property · more than one approval layer

Local rule · reviewed 8 October 2026

What the municipal rules say

Duncan amended Zoning Bylaw 3166 to allow up to four units in its Low Density Residential district.

What applies locally

The city specifically cautions that servicing, buildable area, siting and other development regulations can reduce what is feasible even where the LDR zone permits extra homes.

Important limits and exceptions

Much of the LDR area east of the Trans-Canada Highway is in a floodplain. Floodplain Bylaw 3236 and the flood-construction level map can prevent new units below the required elevation.

Before work begins: confirm the lot’s actual zoning, mapped overlays, legal parcel characteristics, servicing and applicable building permit conditions with the municipality.

Indexing: City guide: enacted rules summarized; parcel permit not verified. Municipal guidance is a starting point, not a property approval. This page is not municipal permission for a specific address.

Optional project planning

After the rule check: budget and contractor scope

Use these tools only after confirming the municipal path. Cost planning and contractor matching do not establish zoning, code compliance or permit approval.

1 · BudgetEstimate renovation costs in DuncanOpen Home Cost Canada’s national calculators, then choose the closest available market and adjust the project scope.Open cost planner →2 · ContractorFind a local BC contractorBC Quote is a separate contractor-matching service. Use it after the zoning and permit path are understood.Start contractor match →

How this guide was verified

Guide verification: Targeted official-source claim check (12 October 2026); not a comprehensive enacted-bylaw signoff. The identified claim is supported by or compared with the linked official source, subject to the verification limitations below.

Property confidence: Not assessed. City-wide guidance does not confirm permission for a particular parcel. Check official zoning, overlays and permits. How verification works →

Official Duncan sources

Duncan SSMUH and ADU guidance ↗Duncan current zoning and maps ↗Duncan pre-reviewed ADU designs ↗Official municipal source checked (Oct 2026) ↗

Reviewed October 8, 2026. Check the current bylaw and the mapped parcel directly with municipal planning before constructing or legalizing housing.

Official-source claim check · 12 October 2026: City confirms amended Bylaw 3166 permitting up to four dwellings in LDR subject to buildable area, servicing and land constraints. Official municipal evidence ↗ Remaining verification: Floodplain mapping, overlays and parcel-level development permits not verified.