Can the Lot Next Door Become 4 to 6 Homes? Multiplex Zoning, Laneway and Coach Houses

by Alex Dunbar

Two-storey laneway house with a single garage door facing a back lane beside a magnolia tree

You might have bought on a quiet street of detached homes expecting it to stay that way. Under BC's small-scale multi-unit housing rules, a lot on that street may now be zoned for 3, 4 or even 6 homes, and in some cities a project that fits the zoning doesn't need council approval at all.

That's either the best news you've heard all year or the worst, depending on which side of the fence you're on. If you own the lot, it can mean more value and more options. If you live next door, it can mean construction, more cars on the street and a 3-storey building where a rancher used to be. Let's walk through what the rules actually say, what Surrey, Langley Township, Maple Ridge and Delta did with them and how to check a specific address.

The Short Version

The province's Bill 44 (2023) required municipalities to update their zoning by June 30, 2024. On most single-family and duplex lots inside urban areas, that means at least 3 units on lots of 280m² or less and at least 4 on larger lots, with 6 required on qualifying lots near a frequent bus stop. Surrey, Langley Township, Maple Ridge and Delta have all published local versions. The details, especially parking and which lots qualify for 6, differ by city, so always check the address on the city's own map.

What Bill 44 Actually Requires

Row of new three-storey townhomes with several front doors on a sunny Langley street

The provincial small-scale multi-unit housing page lays out the baseline. In municipalities with more than 5,000 people, on lots inside an urban containment boundary that were zoned for single-family homes or duplexes, local governments had to allow a minimum of 3 units on parcels 280m² or smaller and a minimum of 4 units on parcels larger than 280m².

Six units must be allowed near frequent bus service. The province defines a frequent stop as one with at least one route where a bus stops, on average, every 15 minutes between 7am and 7pm on weekdays, and every 15 minutes between 10am and 6pm on weekends. The provincial policy manual, linked from that page, sets the distance at 400m from the stop. For those 6-unit transit lots, the manual says local governments can't set parking requirements at all.

The original deadline was June 30, 2024. In 2025 the province passed Bill 25, which widened the definition of the zones these rules apply to, including lots where a house with a secondary suite and a detached accessory unit is allowed, and set a new bylaw update deadline of June 30, 2026, unless a municipality applied for an extension.

Units can come in a lot of shapes: a duplex with suites, a triplex, a fourplex or a house plus a detached unit out back. The detached one is what you'll hear called a coach house, a garden suite or a laneway house, depending on the city.

What Surrey Adopted

Aerial view of new townhomes and detached houses in Fleetwood, Surrey at sunset

Surrey adopted its changes on July 8, 2024, and they took effect the same day. The city's page says lots smaller than 280m² may allow up to 3 units and lots larger than 280m² may allow up to 4. Lots between 281m² and 4,050m² that sit within 400m of a frequent bus stop may allow up to 6, and in those frequent bus stop areas no off-street parking or loading spaces are required.

To check a lot, Surrey points you to Schedule F of the Zoning Bylaw and its COSMOS mapping tool. Surrey defines a coach house as a unit above or attached to a detached garage and a garden suite as a ground-level building separate from the main house, and both count toward the unit total. One of Surrey's own examples is a duplex with 2 secondary suites and 2 coach houses, for 6 units.

Two details matter if you're buying. Existing restrictive covenants registered under section 219 of the Land Title Act still apply, so a covenant on title can still limit what gets built. And the new rules don't retroactively legalize a suite or coach house that was built without permits.

What Langley Township Adopted

The Township adopted its amendments on November 18, 2024. Its page lists 3 units for lots of 280m² or less and 4 units for lots between 280m² and 4,050m². Lots larger than 4,050m² aren't eligible. To qualify, a property also has to be inside the Urban Containment Boundary, connected to both municipal water and sewer, not heritage designated by bylaw and not inside a Transit-Oriented Area.

That last one matters around Willowbrook. The Township's only Transit-Oriented Area is the 800m radius around the Willowbrook SkyTrain station on the Surrey-Langley SkyTrain line, designated May 2, 2025, where much bigger buildings are allowed instead. My Surrey-Langley SkyTrain guide covers what the line means for the areas around it.

The Township requires at least 1 parking space per unit and at least 2 per lot. Its page lists only the 3-unit and 4-unit tiers, with no 6-unit tier near frequent buses, so don't assume a Township lot on a busy route gets 6 just because Surrey's or Delta's would.

Tools & Resources

Run your numbers, find the areas that fit how you live and compare them side by side.

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What Maple Ridge Adopted

Maple Ridge's page on its bylaw changes covers single-family and duplex lots inside the city's Urban Area with city water and sewer. In most cases that's 3 units on lots under 281m², up to 4 on lots from 281m² to 4,050m², and up to 6 on lots of at least 281m² within 400m of a bus stop with frequent service. The city lists detached garden suites among the allowed housing types.

Maple Ridge has kept adjusting its housing rules since then, including a pilot announced August 7, 2026 to speed up processing for eligible triplex and fourplex projects. That pilot doesn't add density beyond what the provincial rules already allow, but it's another reason to check the current bylaw rather than a news story.

What Delta Adopted

Delta's page describes up to 3 units on lots up to 280m², up to 4 on lots over 280m², and up to 6 on lots over 280m² within 400m of frequent transit along Scott Road, where the property sits in the "SSMUH 6 Unit Area" on DeltaMap. Each lot can have a single detached home or a duplex, a secondary suite (1 in a house, 2 in a duplex), plus a garden suite and/or coach house, with a maximum of 2 combined.

Delta requires 1 parking space per unit, though units under 33m² don't need one, and neither do units in the Scott Road 6-unit area. Projects that follow the zoning bylaw don't need public notification or council approval. If you're looking at North Delta near Scott Road, that's the part of Delta where this hits hardest.

If You're Buying Next to a Lot That Could Change

You might think a quiet cul-de-sac is safe. Sometimes it is, but you want to know rather than hope.

Check the lot size of the neighbouring properties, which you'll find on BC Assessment or the city's map. Then check whether the street sits within 400m of a frequent bus stop on the city's map. A large, older home on a big lot near a frequent route is the most likely candidate for a rebuild, and that's worth knowing before you fall in love with the backyard. It's one of the checks I'd add to my list of Surrey homes that look great on paper but come with real risks.

The upside of buying next door to a lot like this is that your own lot probably has the same potential. The downside is that you don't get much say in the timing.

If You Own One of These Lots

For owners, more units on paper doesn't always mean more units in real life. Building a fourplex is a construction project with real risk: permits, servicing costs, financing and a market that has to want what you build. A coach house or garden suite is often the more realistic first step, especially if you want rental income or space for family while you stay in the main house.

Before you pay extra for a lot because of its "potential", get the real numbers on what it would cost to build and confirm the zoning and any covenants on title with the city and your lawyer. Start with the carrying cost of the lot itself in my mortgage calculator.

Who This Is Not For

If you want a street that stays exactly as it is for the next 20 years, an urban lot under these rules is the wrong fit. Look instead at acreage outside the Urban Containment Boundary, like rural parts of Langley Township, or at a lot over 4,050m² in the Township, which isn't eligible under its rules. A bare land strata with its own bylaws can also be more predictable, though you'll want a lawyer to confirm what those bylaws allow. My Neighbourhood Matchmaker quiz can point you toward areas that fit how you want to live.

And if you're buying a lot purely as a development play and you've never built anything, this probably isn't your first project. Start by talking to a builder who has done one of these in the city you're looking at.

FAQ

How many units can I build on my lot in Surrey?

Surrey's page says up to 3 units on lots under 280m², up to 4 on larger lots, and up to 6 on lots between 281m² and 4,050m² within 400m of a frequent bus stop. Check your address in COSMOS and Schedule F.

Can I build a laneway or coach house in Langley?

In the Township, detached garden suites are one of the small-scale housing types, on eligible lots inside the Urban Containment Boundary with water and sewer. The City of Langley is a separate municipality, so check its own rules for an address there.

Does the lot next door need a public hearing to build a fourplex?

Often not. Delta says projects that follow its zoning bylaw don't need public notification or council approval. Other cities set their own process, so check the city's page for the address.

Do restrictive covenants still apply under Bill 44?

Surrey's page says existing section 219 covenants still apply. Have your lawyer review title before you count on a lot's potential.

How close to a bus stop does a lot need to be for 6 units?

Under the provincial rules, within 400m of a frequent bus stop, meaning a route with a bus on average every 15 minutes between 7am and 7pm on weekdays and between 10am and 6pm on weekends.

Are big lots in Langley Township eligible for multiplex zoning?

No. The Township's page says lots larger than 4,050m² aren't eligible, and a lot also has to be inside the Urban Containment Boundary with municipal water and sewer.