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Duplex, fourplex or multiplex: which fits your lot?

How BC’s minimums, your municipality’s bylaw and your lot’s servicing, trees and slope decide whether it can take two, four or six homes. A plain guide.

By Arash Mohsenijam, Founder · · 4 min read

Duplex, fourplex or multiplex: which fits your lot?

How many homes a lot can hold depends on three layers. The Province sets a minimum. Your municipality can allow more. Then the lot itself, with its services, trees, slope and lane access, decides what is practical.

What does BC require in a lot’s zoning?

For lots zoned only for single-family or duplex use, the Province requires:

LotHomes the zoning must allow
280 m² (about 3,014 sq ft) or smallerAt least 3
Larger than 280 m²At least 4
Larger than 280 m² and near frequent bus serviceUp to 6

“Frequent” means a stop served about every 15 minutes on average, 7 a.m. to 7 p.m. on weekdays and 10 a.m. to 6 p.m. on weekends. Bill 25, passed in November 2025, widened what counts as a restricted zone, and local bylaws were due by June 30, 2026, unless a municipality has an extension. See Bill 44 and Bill 25: what applies today.

These are minimums. They are not a promise that your lot can hold that many.

Does my municipality allow more?

Sometimes. It varies a lot:

MunicipalityWhat the rule saysRead
Vancouver (R1-1)Multiplexes are already allowed. Site area and frontage set the count, and most lots can hold 4 to 8 homes.Vancouver R1-1: what your lot can hold
Burnaby (R1)3 homes on lots of 280 m² or less, 4 on larger lots, and 6 on lots of 281 m² or more within 400 m of a 15-minute bus stop. Council tightened the zone in December 2025.Burnaby’s R1 zone after the December 2025 changes
City of North Vancouver (GO)Since December 8, 2025: 3 homes on lots of 280 m² or less, 4 on larger lots in most neighbourhoods, and 6 on larger lots along designated corridors.The Ground Oriented zone
District of North VancouverR2 lots inside the urban boundary allow a house, a suite and a coach house. Multiplexes of 4 to 6 homes are not allowed yet.The new R1 and R2 zones
West VancouverBylaw 5446 would allow 4 homes on most single-family and duplex lots and 6 in a new zone near Marine Drive. It had three readings on September 21, 2026 and is not yet law.West Vancouver Bylaw 5446

Municipal rules are dated checks. Confirm the current bylaw for your lot before relying on any row.

What decides the count on your lot?

Beyond zoning, these usually decide it:

Which type fits which lot?

TypeUsually fitsWhat to settle first
DuplexA single-family lot where you want two homes. Lot width and lane access usually decide the layout: narrower lots tend to suit back-to-back, wider lots side-by-side with two street-facing entries. Suites are possible where zoning allows.A layout test on your lot, titling (strata or not; confirm with a lawyer), suites
Triplex or fourplexThree or four homes on one lot where the municipality’s small-scale multi-unit rules allow. Often suits families combining households or long-term investors.Lot area and frontage, transit distance, lane and parking, service capacity, trees and slope
Multiplex (five or more)Larger or assembled lots near transit, where feasibility decides everything.Assembly or lot area, transit-oriented area status, servicing upgrades, development cost charges and amenity contributions, fire-department reach

We test more than one option on a lot before design starts. If a duplex is the practical answer, we say so.

Does the type change the financing?

It can. Budget 2026 proposes mortgage insurance of up to 90% of projected completed value for a new triplex or fourplex, from Feb 1, 2027. Today’s insured limit is $1.5 million, which most Metro Vancouver fourplexes exceed. These are budget proposals; confirm with your lender that they are in force. See Triplexes and fourplexes: up to 90% financed.

Quick answers

How many homes can I build on a lot in BC?

At least 3 on lots of 280 m² or less and at least 4 on larger lots, in zones that were single-family or duplex only, with up to 6 near frequent bus service. Your municipality’s bylaw and the lot’s servicing, trees and slope decide the real number.

Is a duplex or a fourplex better?

It depends on the lot, the rules and your goal. We run more than one option on your lot before design starts, and we say so if a duplex is the practical answer.

How do I find out what my lot can take?

Ask for a free lot check: a one-page desktop review of what the lot appears to allow, within two business days.

Have a lot in mind?

Send the address and we’ll run a free desktop check of what it appears to allow, within two business days.

Request a lot check →
Sources

Province of BC, Small-scale, multi-unit housing page (updated Jan 20, 2026); City of Burnaby, R1 Small-Scale Multi-Unit Housing District; InoBuilt Insights on Vancouver R1-1, Burnaby, the City and District of North Vancouver and West Vancouver, which list their own sources. Municipal rules are dated checks. Not legal advice; confirm your lot with the municipality.

General information, checked Nov 11, 2026. Rules change and differ by municipality; confirm for your lot before relying on it. Not legal, tax or financial advice.

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