What does it cost to build a multiplex in Toronto?

The five cost categories

Every multiplex development project carries the same five categories of cost. The relative weights shift by program, but the categories are always there.

Why "cost per square foot" is the wrong question

Almost every conversation about construction cost starts with PSF. We understand why — it's a single number that's easy to remember and easy to compare. But for this category of building, it's misleading more often than it's useful.

Here's why:

• Building size moves PSF non-linearly. A small building has the same kitchen, the same bathroom, and the same building permit as a larger one — those fixed costs spread over fewer square feet. A 1,500 sq ft fourplex unit will have a much higher PSF than a 4,000 sq ft sixplex unit, even with identical finishes.
• Complexity isn't captured. A flat site with surface parking and a slab foundation has a fundamentally different PSF than the same building program on a sloped site with a deep basement, a retaining wall, and a tight rear setback. PSF doesn't distinguish.
• Finish level swings cost. A unit with builder-grade laminate, a particleboard kitchen, and standard windows costs materially less than the same unit with engineered hardwood, custom millwork, and triple-glazed wood-clad windows. Both are "a Toronto multiplex unit."
• Servicing surprises don't fit in PSF. A new electrical service from the transformer is a flat cost that hits the project budget the same way whether the building is 3,000 sq ft or 7,000 sq ft.

When someone publishes a PSF figure for "Toronto multiplex construction," they've averaged across all of these dimensions. The number isn't wrong; it just isn't a planning tool.

Better questions to ask

The questions we'd suggest replacing "what's the PSF?" with:

"What does it cost to deliver an unleveraged unit?"

Take total project cost (land + hard + soft + financing + contingency, ignoring leverage), divide by the unit count. This is the all-in delivered cost per rental door. It's the right input for thinking about whether a building program makes economic sense at projected rents and cap rates.

"What's the marginal cost of the next unit?"

Going from a fourplex to a sixplex on the same lot adds two more units inside roughly the same envelope. The marginal cost is much less than the average cost — most of the structure, foundation, and roof are already there. This is the right framing for deciding whether to push density.

"How much of this is fixed vs. variable to my decisions?"

Land cost is fixed. Development charges are largely fixed by unit count. Excavation depth and parking strategy are decisions you can make. Finish package is entirely a decision. Separating the levers you can pull from the ones you can't is more useful than a PSF average.

The variables that move cost the most

In our experience, three line items account for the majority of cost variation between otherwise-similar Toronto multiplex projects:

Excavation depth. A walkout basement on a sloped lot adds units cheaply. A deep dig on a flat lot adds units expensively. Below-grade construction also brings hydrogeological costs, shoring, dewatering, and waterproofing — all of which scale faster than above-grade construction.

Finishes. The single largest controllable variable. The same floor plan with two different finish packages can land a long way apart on hard costs. The right finish level is the one that matches the rents in the neighbourhood — over-finishing for the market is the most common cost mistake we see.

Parking. Above-grade surface parking is essentially free. Below-grade structured parking is among the most expensive things you can build. In neighbourhoods where the bylaw still requires parking, this is a real budget question; in neighbourhoods where parking minimums have been reduced or eliminated, you can often build no parking at all and lose nothing in lease-up.

What a decade of building has taught us

A few patterns from our delivered and in-construction projects:

• The most valuable project is rarely the as-of-right one. Yes, a variance or rezoning adds soft cost and carrying cost. But the extra square footage and the extra doors it unlocks almost always outweigh that cost — and more units is precisely what de-risks a project, because vacancy and surprises get spread across a larger rent roll. The discipline isn't avoiding approvals; it's knowing exactly how far a given lot can be pushed, and how to get there without the process dragging.
• Our edge is the opposite of a template. We don't repeat one floor plate across five lots. Every building is designed from scratch for its site — and we still keep hard costs among the lowest in the market, because a decade of working with the same trades, consultants, and suppliers means accurate pricing, fewer surprises, and no learning curve on each new job. The savings come from relationships and judgment, not repetition.
• The right contractor relationship matters more than the lowest tender. A trusted GC who knows your standards saves you contingency by surfacing issues early. A bargain GC who has never built a multiplex costs you more by year-end.
• Finishes set rents, but envelopes hold value. Spend the marginal dollar on windows, insulation, mechanical durability, and the building envelope. Tenants notice the kitchen, but the operator pays for the roof for thirty years.

Where we actually save you money: the approvals

Here's the part most cost conversations miss. The single biggest lever on a Toronto infill project isn't the finish package or the foundation — it's how many rentable square feet the City lets you build on the lot you already own. Two operators can buy the identical lot; the one whose team genuinely understands what that lot can support — and how to design and approve to it — ends up with a fundamentally better asset, at almost the same land and soft cost.

That is our core competency. We are not a repeatable-template builder chasing volume — we are the team that pushes the zoning envelope, through the Committee of Adjustment, rezonings, and the new Major Streets allowances, to extract the maximum a site can carry. We have one of the strongest approvals track records of anyone doing this work in Toronto, and it's what we're known for. Pair that with a trade-and-consultant network built over a decade that keeps construction costs among the lowest in the market, and the math compounds in the same direction every time: more building, more doors, a lower cost per unit, and a project de-risked because it isn't living on the margin.

How we'd answer your "what does it cost" question

If you bring us a site, the conversation we want to have isn't "what's the PSF on a Toronto sixplex." It's:

• What's the lot, and what does it constrain?
• What building program does it support, and at what permitting path?
• What rents does the neighbourhood support, at what finish level?
• What's the all-in delivered cost per unit at that program, and what's the unleveraged yield?
• Where are the biggest risks, and what's the contingency to cover them?

That's a five-question conversation, not a one-number answer. It's also the only conversation that produces a budget you can actually build to.

For where we focus, see large multiplexes (with fourplexes and sixplexes for smaller schemes). For how we run a project end-to-end — pushing the approvals and managing the build — see development management and construction management.