Infill & Multiplex

Multiplex Builder, Whistler

Whistler has permitted three or four homes on most single-family and duplex lots since 2024. The rules are strict about floor area, buildings and rental, so on a Whistler lot the design decides whether a multiplex works. This is how the rules shape the building, and how we approach it.

Ask about your lot →

Where things stand · 28 September 2026

Whistler adopted its small-scale multi-unit housing bylaw, No. 2440, on 11 June 2024, and replaced it with Bylaw No. 2461 on 11 March 2025. The rules sit in Section 35 of Zoning and Parking Bylaw No. 303 and are in force now. The Municipality counts about 3,035 parcels in scope: 2,942 allow up to four homes and 93 allow up to three. Section 35 explained, clause by clause →

A Whistler multiplex, in numbers

Every figure below is from Section 35 of Bylaw 303, or from the zone regulations it sits on top of, as consolidated on 8 August 2026.

Rule	What Section 35 allows	Clause
Homes	3 on a parcel of 280 m² or less, 4 above 280 m²	35(5)
Buildings	No more than 2	35(6)
Floor area, whole parcel	FSR 0.40 or 511 m², whichever is lower (0.45 in RT1 and RT6)	35(8) to 35(10)
Smallest home	32.5 m²	35(11)(c)
In-ground basement	Excluded up to 125% of the storey above	35(12), 26(1)(a)(ii)
Parking	At least 1 per home, no more than 6	35(15)
Side setback	3 m in RS1, RS2, RS4, RI1, RT1, RT2, RT6	35(14)
Front and rear setback, height	7.6 m each, in the same seven zones	Zone rules
Rental	1 of 3 homes, 2 of 4	35(17), 35(18)
Strata sale	Needs an employee housing agreement	35(21), 35(22)
Nightly rental	No new rights	35(23)

Four homes, one floor area budget

The number that shapes a Whistler multiplex is not the unit count. It is the single floor area cap the homes share. In the RS1, RI1, RS2, RS4 and RT2 zones it works out like this:

Parcel	Floor area for the whole parcel	Average per home, four homes
700 m²	280 m²	70 m²
1,000 m²	400 m²	100 m²
1,300 m²	511 m²	about 128 m²
2,000 m²	511 m²	about 128 m²

That is before the exclusions. In each building, a qualifying in-ground basement can add up to 125% of the storey above it without counting toward the cap, and up to 105 m² of parking area is excluded for four homes. On a Whistler multiplex, the basement is usually where the design is won or lost, which is why we look at the finished grades before we look at floor plans. How the basement exclusion works →

Layouts the bylaw allows

Clause 35(6) allows any combination of detached dwellings, duplex dwellings, auxiliary residential dwelling units and apartment or townhouse buildings, up to the permitted number of homes, in no more than two buildings. On a four-home parcel that includes, for example:

One fourplex, four homes in a single building.
Two duplexes, two buildings with two homes each.
One duplex with an auxiliary unit in each half. An auxiliary unit may not exceed 40% of the duplex unit it sits in, 35(11)(b).
Two detached houses, each with an auxiliary unit. An auxiliary unit may not exceed 40% of the house it sits in, 35(11)(a).

Which one is right depends less on taste than on the site: where the grade allows a qualifying basement, how six parking spaces reach the road, and how two buildings fit between 3 metre side setbacks under a 7.6 metre height limit. It also depends on who the homes are for, because the rental and employee housing rules decide what can be sold and what must be rented.

Where a Whistler multiplex is won or lost

The basement. The exclusion only applies to the lowest floor, and only where at least half of its exterior wall height is below the finished ground adjoining the wall. Grading, retaining and the floor plan all have to be designed to that test.
Parking. Up to six spaces, each reaching the road directly or through one other space. On a narrow or steep frontage, the driveway often decides how many homes are practical.
Rental and title. Two of four homes must be residential rentals, and a strata sale needs an employee housing agreement. The building program should be set with those units in mind from the start.
Permit areas. Section 35 exempts the design from form and character development permits, but not from riparian, sensitive ecosystem or wildfire protection development permits, 35(25).
Mountain construction. Snow-load structural engineering, snow-season access and moving trades and materials up the Sea-to-Sky corridor all belong in the budget from the first meeting.

How we work in Whistler

The zone and the five tests. We confirm the zone and whether the parcel qualifies under clause 35(5), before anyone draws anything.
The site and the title. Grades, access, servicing, development permit areas and the covenants on title, which remain in effect under Section 35.
Basement first. We test how much of the program can sit in a qualifying in-ground basement, because that sets how generous the homes can be.
A number, early. A construction budget and a permit path before drawings are finalized, so the design is calibrated to the number rather than the other way round.
One team from design to handover. Design, engineering, permitting and construction under one contract, with our own site supervision from our West Vancouver base.

Eurohouse Construction is a BC Housing licensed residential builder with 16+ years, 100+ projects and 25+ Georgie and HAVAN awards. We are Pacific Home Warranty certified and carry $5M in general liability insurance. In Whistler, our work includes the Rainbow residence. The first lot review is free.

Want to see the numbers for a specific parcel? The Whistler lot calculator runs the tests, the floor area cap and the basement exclusion. Building a single home instead? Whistler custom homes →

Whistler multiplexes: common questions

Can I build a fourplex in Whistler?

On most single-family and duplex lots, yes. Section 35 of Whistler’s Zoning and Parking Bylaw No. 303 permits four homes on a parcel larger than 280 m², and three on a smaller one, if the parcel is serviced by municipal water and sewer, is wholly or partly inside the Whistler Urban Development Containment Area, is 4,050 m² or smaller, is not in a transit-oriented area, and is not in a zone whose minimum subdivision parcel area is 4,050 m² or more. The Municipality counts 2,942 parcels that allow up to four homes and 93 that allow up to three.

How big can a Whistler fourplex be?

The whole parcel shares one floor area cap: a floor space ratio of 0.40 or 511 m², whichever is lower, in the RS1, RI1, RS2, RS4 and RT2 zones, and 0.45 or 511 m² in RT1 and RT6. No home may be smaller than 32.5 m². Qualifying in-ground basement floor area, up to 125% of the storey immediately above, does not count toward the cap, and neither does parking area up to 105 m² for four units.

How many buildings can a Whistler multiplex have?

No more than two. The homes can be any combination of detached dwellings, duplex dwellings, auxiliary residential dwelling units and apartment or townhouse buildings, up to the permitted number of units, clause 35(6).

Do I have to rent any of the units?

Yes. With three homes at least one must be in residential rental tenure, and with four at least two, under clauses 35(17) and 35(18). Those units are identified on the building permit application, and the Municipality may require an annual statutory declaration. The Municipality states there are no rent or price restrictions on these units.

Can I strata the units and sell them?

Section 35 allows strata or Land Title Act subdivision on condition that the owner enters into an employee housing agreement with the Municipality, in the form of Schedule "T" to the bylaw, covering at least as many units as are required to be rental, clauses 35(21) and 35(22). Read that agreement before settling on a design or a sales plan.

Can the units be nightly rented?

Section 35 adds no tourist accommodation rights, clause 35(23). The Municipality’s guidance is that a property must be zoned for tourist accommodation and hold a business licence before it can be rented to tourists.

How much parking does a Whistler fourplex need?

At least one space per home and no more than six on the parcel, clause 35(15). Each space must reach the road directly or through not more than one other space, which allows tandem parking.

Does Eurohouse build in Whistler?

Yes. Eurohouse Construction is a BC Housing licensed residential builder with 16+ years and 100+ projects, and our Whistler work includes the Rainbow residence, an all-ICF home built to BC Energy Step Code 4. We work from our West Vancouver base with our own site supervision, and the first lot review is free.

Start with the address, not the drawings

Send us the address. We will confirm the zone, check the parcel against the Section 35 tests, and tell you what the floor area budget and the basement are worth on your site before anyone draws anything.

Ask about your lot → Section 35 explained →

Sources and status. Rules and numbers on this page are read from Part 5, Sections 26 and 35, and the RS1, RS2, RT1, RT2, RT6 and RI1 zone regulations, in the Resort Municipality of Whistler’s consolidation of Zoning and Parking Bylaw No. 303, 2015 dated 8 August 2026. Parcel counts are from the Municipality’s Engage Whistler page, and guidance on rental, parking and covenants from its Housing Legislation FAQs. This page is general information, not legal, planning or design advice. Confirm current requirements with RMOW Planning at 604-935-8170 or planning@whistler.ca before making decisions. Last updated 28 September 2026.