How the two options compare, and what decides which one suits a Vancouver lot
Since Vancouver began accepting multiplex applications in November 2023, the City had received roughly 370 of them by the end of March 2025, covering about 1,500 homes. In 2024, multiplexes became the most common type of application in the R1-1 zone at about half of everything submitted, ahead of duplexes at about 30% and single detached houses at about 20%. For owners of a Vancouver lot, that raises a practical question: is a duplex or a multiplex the better fit?
The answer depends on the lot, the zoning, the budget and what the owner wants to do with the finished homes. This guide explains how the two compare and what to check first.
What is the difference between a duplex and a multiplex?
A duplex is a building with two homes. A multiplex is a building with three or more. In Vancouver’s R1-1 zone, the City’s rules allow for both, and the number of homes a lot can hold depends on the property. The City’s Small-Scale Multi-Unit Housing guide sets out the current rules, and they should be checked for the specific lot because they can change.
How do duplexes and multiplexes compare?
| Question | Duplex | Multiplex |
|---|---|---|
| Number of homes | Two | Three or more |
| Preliminary total cost range | About $1.2M to $1.6M | About $1.6M to $2.2M for three homes, rising to about $2.6M to $3.6M for six |
| Design and approvals | Generally simpler | Usually more involved, with more detail to coordinate |
| City charges | Fewer homes, so fewer per-home charges | Charges grow with each home |
| Fit with the lot | May suit smaller or tighter lots | May suit larger lots, if the zoning and site allow |
These cost ranges are preliminary allowances based on 2026 Vancouver market data, not quotations. They should not be added to other figures, and they vary by property, finishes and site conditions.
When might a duplex be the better choice?
A duplex may suit an owner who wants a smaller project with fewer moving parts. Fewer homes usually means a smaller budget, a simpler design and approvals process, and fewer per-home City charges. It can also be a good fit where the lot size or shape limits how many homes can be added.
Our duplex design and construction page covers how we approach these projects.
When might a multiplex be the better choice?
A multiplex may suit an owner whose lot is large enough to hold more homes and who wants to spread the land cost across them. The City’s own figures show that multiplexes became the most common application type in R1-1 in 2024, which shows owners are choosing it. A multiplex also gives more options for how the finished homes are used, whether sold, rented or a mix.
It is also a larger project. More homes mean more design coordination, more City charges and a larger budget, so a careful feasibility review matters more. See our multiplex construction page and the multiplex cost guide for more detail.
Example: a duplex on West 12th Avenue
The W. 12th Duplex in Vancouver is a contemporary three-storey duplex unit of about 1,500 square feet, for which our team provided the building design. It shows what a well-designed duplex can look like on a Vancouver lot. Every lot is different, and a project like this started with a feasibility review of the site.
What should be checked before deciding?
A site-specific feasibility review is the most reliable way to compare the two options. It looks at:
- What the current zoning allows on the lot, including its size, width and access
- The condition and location of the existing house, and whether keeping it is an option
- Trees, slope, soil, easements and utility connections
- The preliminary construction budget, plus design, permit and City charges for each option
- How the finished homes will be used, whether sold, rented or lived in
Rules also differ between cities. Our guides for Burnaby and Coquitlam cover those municipalities.
What is the first step?
Ask for two comparable feasibility budgets, one for a duplex and one for a multiplex, so the options can be compared on the same basis. Because design and construction are one team, the numbers in our review are the numbers we build to. See our process for how the steps fit together.
Frequently asked questions
Is a multiplex always better than a duplex?
Not necessarily. A multiplex means more homes but also a larger budget and more complexity. The better option depends on the lot, the zoning and the goals for the project.
Can any Vancouver lot hold a multiplex?
Potentially, but not every lot. Size, width, access and servicing all affect what is possible, so confirm for your property.
Is a duplex cheaper to build?
Generally yes, because it has fewer homes and a simpler design and approvals process. The cost per home can differ, so it is worth comparing both options on the same basis.
Do the rules change?
They can. Vancouver has updated its zoning rules since multiplexes were first allowed, and other cities have their own rules. Check the City’s current guide for your lot before relying on any article, including this one.
Can I keep my existing house and add homes?
Sometimes. Some lots allow a character house to be kept while homes are added. See our page on character home renovation for one route.
How long does a duplex or multiplex project take?
It depends on the size, the site and how long City approvals take. A feasibility review should include a realistic schedule for your property.
Let’s Look at Your Lot
Whether a duplex or a multiplex is right is a question with a real answer, and it comes from your lot and your goals. We have been a Design + Build firm in Vancouver for over twenty-five years, with design, permitting and construction under one roof.
Send us your address. We will tell you what the lot may allow and how the two options compare. Let’s create your Amazing Space.
References
- City of Vancouver – Memo to Mayor and Council, 29 May 2025: R1-1 Residential Inclusive Zone update
- City of Vancouver – Small-Scale Multi-Unit Housing guide
Note: This is general information, not confirmation of development rights on a specific property. Current zoning, City interpretation and permit requirements must be verified for each site.
