Toronto’s free pre-approved fourplex & sixplex plans (2026 guide)

Toronto just removed one of the most expensive early steps of building a multiplex: the design. On October 2, 2026, the City expanded its Pre-Approved Building Plans Program with free fourplex and sixplex designs, drawn by LGA Architectural Partners through a competitive procurement process. The pitch is simple — download a design at no cost, and if your lot’s zoning cooperates, move faster toward a building permit with less paperwork and no Committee of Adjustment. As a builder, I read this as the single most practical housing announcement Toronto has made for small-scale investors and homeowners in years. But “pre-approved” is doing a lot of work in that sentence, so let’s be precise about what it means — and what a multiplex actually costs once the free plans are downloaded.

What Toronto actually released

Four building designs: a fourplex and a sixplex, each drawn for narrow lots and for wide lots. Each design comes with a choice of heating and cooling system, which brings the total to ten plans — the fourplex offers electric, gas, or hybrid systems, while the sixplex offers electric or hybrid. The designs meet the Ontario Building Code and the zoning rules that apply to the building design itself, and they were developed with accessibility, climate resilience, cost, and ease of construction as core considerations — including sustainable features, bicycle parking, and waste storage.

This builds on the City’s existing pre-approved plans for garden and laneway suites, and it complements the CMHC’s national Housing Design Catalogue. The through-line is consistent: standardized, code-compliant designs that give small projects a head start instead of starting every drawing set from zero.

What “pre-approved” means — and what it doesn’t

Per the City of Toronto’s October 2, 2026 news release and program page. Program details can change — confirm current terms at toronto.ca/PreApprovedPlans before planning around them.

The zoning reality: fourplexes everywhere, sixplexes depend on location

This is the part that decides whether the program helps you at all. Fourplexes are currently permitted city-wide in Toronto, so the pre-approved fourplex designs are broadly usable. Sixplexes are a different story: whether a sixplex is allowed depends on where your lot is. The pre-approved sixplex designs only unlock speed where the zoning already permits six units.

Where the multiplex meets zoning, the path is genuinely streamlined: no Committee of Adjustment, straight to a building permit application with the plan number on the form. Where zoning doesn’t permit it, nothing about this program changes your position — you’re back to the standard route of minor variances and Committee of Adjustment hearings, with all the time and cost that involves.

Before you spend a dollar on design, verify the lot yourself. Start free: the City of Toronto’s Interactive Zoning By-law Map lets you search any address and confirms the zone, height overlay, and exceptions. Then spend the small fee on a formal Zoning Applicable Law Certificate (or preliminary zoning review) from Toronto Building — it catches most deal-breakers cheaply, before you’ve hired anyone. Cross-check the Official Plan’s Neighbourhoods designation, any heritage or ravine overlays, Chapter 900 site-specific exceptions, and the multiplex by-law itself.

Narrow lot or wide lot? Which design fits your property

The City drew each building type twice — once for narrow lots, once for wide lots — because lot width is the constraint that kills most multiplex concepts. Toronto’s residential lots vary enormously: the tight 25-foot lots of the old city behave nothing like 50-foot suburban lots in Scarborough or Etobicoke. The narrow-lot designs are the more interesting of the two for most homeowners, since narrow lots are where a custom design gets expensive fastest.

But the drawings fitting the lot envelope is only the start. On a narrow lot, the real constraints are side-yard setbacks squeezing buildable width (lots under about 20 feet are very tight or impossible for four units), rear-yard soft landscaping minimums, and the puzzle of fitting livable units inside the box: separate entrances, fire separations, egress, and mechanical space all compete for the same square footage. Basement ceiling height is a classic trap — legal units need roughly 1.95 m clear, which often forces expensive underpinning. And none of the drawings show construction logistics: crane access and material staging on a tight street can make or break the budget. Zoning helps here — four units are allowed on residential lots with roughly the same envelope as a house, floor space index often doesn’t apply to multiplexes, and there’s no parking minimum — but the lot still has to work in three dimensions, not just on paper.

What it actually costs to build

The plans are free; the building is not. For new-build infill in Toronto right now, hard construction costs run roughly $300–$400 per square foot at standard rental spec — durable finishes, efficient layouts — climbing to $380–$450 premium and $460–$550+ for luxury or custom. Greener builds targeting MLI Select–tier performance (heat pumps, better envelope) sit at the higher end, around $380–$420.

Converting an existing house is cheaper on paper — $180–$350+ per square foot for the renovation work alone — but conversions carry more risk and variability: structure, underpinning, and bringing an old building up to current code. The honest rule: site conditions drive the biggest cost swings on any multiplex project, and anyone quoting a firm number without a lot-specific review is estimating.

Development charges: the $160,000+ you don’t pay

Here’s a line item most people miss until it saves them six figures. Under Municipal Code Chapter 415, development charges are not imposed on the second through sixth residential units on a single parcel with no more than six units total — which covers exactly what these plans build. Parkland cash-in-lieu is similarly exempted. Against historical full rates of roughly $40,000–$55,000 per unit, that’s on the order of $160,000–$270,000+ staying in your pocket.

Rules evolve — confirm the current exemptions with the City for your exact project, since limited fees (such as educational development charges in some cases) can still apply.

The servicing trap: get your Hydro quote first

If there’s one section of this guide that saves projects, it’s this one. Most Toronto infill lots were serviced for a single household, and a multiplex needs more of everything. Water service upgrades to 1 inch or larger are common for three to four-plus units ($2,000–$12,000+ depending on method and length), and pre-1950s lead or galvanized lines are still out there. Sewer capacity checks sometimes demand upgrades too.

But hydro is the biggest wildcard. A 200A service is often insufficient and 400A is common for a fourplex with electrification. Simple upgrades run into the tens of thousands; complex quotes have reached $26,000–$50,000+, and extreme cases have been reported at $200,000–$350,000 with 8–18 month timelines — rare, but genuinely project-killing. Toronto Hydro runs a Multiplex PowerPlay pilot offering up to $50,000 in support for smart load management to avoid full upgrades on select 4–6 unit projects. Budget $20,000–$100,000+ in servicing contingency depending on the lot, coordinate your trenches to save money — and get the Hydro quote early, before committing serious capital. This is the item that most often surprises owners after the drawings look clean.

Realistic timeline: 12–24 months, end to end

For a clean as-of-right build or major conversion, 12–24 months from first drawings to move-in is realistic, with 14–18 months a common mid-range target. The breakdown:

• Design + engineering + site-specific drawings: 2–4+ months (pre-approved City plans can shave design time)
• Permit submission to issuance: median around 91 days for recent fourplex applications; realistically 8–24 weeks depending on comments and revisions
• Construction: 6–12+ months, framing to finishes
• Final inspections + occupancy: 1–4 weeks

Variances, heritage issues, or Hydro delays can add 3–6+ months on top. Note the shape of that timeline: most of the wait is construction, not City review — which is exactly why the pre-approved plans matter less for speed than people assume, and lot readiness matters more.

Does a fourplex actually pencil? The investor math

It can — but it’s tight, and it depends on location, unit mix, and financing. Current Toronto rents run roughly $1,700–$2,200+ for a one-bedroom, $2,000–$2,900+ for a two-bedroom, and $2,300–$3,500+ for three-bedrooms and larger, with asking rents on new listings higher. A well-located fourplex mixing two- and three-bedroom units might target $9,000–$14,000+ per month gross.

For the numbers to work, five things generally need to be true: the land basis isn’t too high; all-in build cost is controlled (around $350 per square foot or better, hard plus soft, is the preferred zone); the development-charge waiver and no-parking-minimum are doing their quiet work in your favour; the debt-service coverage ratio holds at 1.2x or better after vacancy and operating costs; and ideally you can reach five units — a fourplex plus a garden or laneway suite — which unlocks CMHC’s MLI Select with up to 95% loan-to-cost and 40–50 year amortizations. A pure four-unit project stays in residential financing: higher down payment, shorter amortization. Cap rates on small multi-unit buildings often sit around 4.5–5.5%.

The honest summary: strong rents, efficient design, and ideally that fifth unit with MLI Select financing are usually what separate an attractive return from a break-even one. Pure fourplexes more often play as hold-for-cashflow or value-add investments than high-leverage cash-on-cash winners.

Pre-approved vs. custom: the verdict

A hybrid approach — starting from a pre-approved plan as the base and modifying it — is increasingly common and often the pragmatic middle. The bottom line: the policy environment has improved dramatically since 2023 (as-of-right four units city-wide, development-charge exemptions to six units, no parking minimums, free pre-approved plans). Success still hinges on lot-specific servicing, tight cost control, and — for investors — unlocking five units with MLI Select where possible.

Your next move: the feasibility check

1. Confirm your zoning — free map check first, then the formal certificate. Fourplex as-of-right city-wide; sixplex depends on location.
2. Get your Hydro quote early — servicing is the number-one project killer. Don’t commit capital before you know this number.
3. Download the plans at toronto.ca/PreApprovedPlans and see which design fits your lot width.
4. Engage a qualified design professional for the site-specific drawings — the City requires it, and the lot-specific questions are where projects succeed or stall.
5. Run a preliminary budget — construction, soft costs, servicing contingency, financing — before committing. Numbers move with material and labour markets, so get current local builder and engineer quotes.

Thinking about a fourplex or sixplex on your lot? Book a free walkthrough — we’ll look at your lot, your zoning, and which pre-approved design actually fits, then price the build honestly. Our design-build process handles feasibility through construction as one project.

Quick answers

Are Toronto’s pre-approved multiplex plans really free?

Yes. The City offers the fourplex and sixplex designs as free downloads at toronto.ca/PreApprovedPlans. The plans were drawn by LGA Architectural Partners, selected through the City’s competitive procurement process, and meet the Ontario Building Code and the zoning rules that apply to the building design itself.

Do I still need an architect if I use a pre-approved plan?

Yes. The City requires a qualified design professional who takes responsibility for the design and prepares the site-specific drawings — grading, servicing, setbacks, and building placement. Budget $25,000–$90,000+ in total professional fees (architectural/permit drawings, structural, mechanical/electrical, energy modelling, survey, zoning review), and expect 4–12 weeks for a complete package. Always start with a zoning feasibility review before spending on full design.

Can I build a sixplex anywhere in Toronto?

No. Fourplexes are currently permitted city-wide, but whether a sixplex is allowed depends on where your lot is. The pre-approved sixplex designs only help where the zoning already permits six units — where it doesn’t, the program changes nothing about what you’re allowed to build.

Does “pre-approved” mean I skip the building permit?

No. You still apply for a building permit and the application still goes through the City’s review. What you skip is the design review — if you use a plan as drawn, the City doesn’t re-review the design — and, where the multiplex meets zoning, the Committee of Adjustment. You enter the plan number on the permit form instead of attaching the drawing itself.

How much does it cost to build a fourplex in Toronto?

Hard construction costs for new-build infill run roughly $300–$400 per square foot at standard rental spec, $380–$450 premium, and $460–$550+ luxury. A compact ~4,000 sq ft fourplex typically lands at $1.3M–$1.7M in hard costs, or $1.5M–$2.0M+ all-in with soft costs — excluding land, HST, and financing. Conversions of existing houses are cheaper ($400k–$1M+ total) but carry more variability. Site conditions drive the biggest swings; anyone quoting a firm number without a lot-specific review is estimating.

How long does a multiplex project take in Toronto?

A realistic end-to-end range is 12–24 months for a clean as-of-right build: 2–4+ months for design and engineering, a median of about 91 days from permit submission to issuance (realistically 8–24 weeks), 6–12+ months of construction, and 1–4 weeks for final inspections and occupancy. Variances, heritage issues, or Hydro delays can add 3–6+ months.

Are development charges waived for multiplexes in Toronto?

Largely, yes. Under Municipal Code Chapter 415, development charges are not imposed on the second through sixth residential units on a single parcel with no more than six units total — saving roughly $160,000–$270,000+ versus full rates. Parkland cash-in-lieu is similarly exempted. Confirm with the City for your exact project, as rules evolve.

What’s the biggest risk in a Toronto multiplex build?

Servicing — especially Toronto Hydro. A 200A service is often insufficient and 400A is common for a fourplex; complex upgrade quotes have reached $26,000–$50,000+, with extreme cases far higher and 8–18 month timelines. Get your Hydro quote early, before committing serious capital. Other frequent gotchas: underestimating fire separations and soundproofing, basement height triggering expensive underpinning, and tree or soft-landscaping bylaws forcing redesigns.

Related reading: What actually pays off in a Toronto renovation — the ROI math, honestly.