Toronto Multiplex Architect: Site Assessment, Zoning & Design
Updated: 40 minutes ago
Toronto multiplex architect webinar. In this January 20, 2026 webinar, Apollo Realty Group hosted Noam, a Toronto architect and interior designer who designs multiplexes, garden suites and missing-middle projects. He explained how to assess a site, read Toronto zoning, decide whether to go to the Committee of Adjustment, and design a project that works for CMHC MLI Select financing without overspending.
Key takeaways: assessing and designing a Toronto multiplex
Aim for a lot at least 25 feet wide. That width lets you put bedrooms side by side, which cuts hallway space and makes better use of every square foot.
For depth, Noam looks for about 120 feet for a fourplex plus garden suite and about 110 feet for a sixplex without a garden suite. Smaller lots can work, but they are tighter.
Check the City of Toronto zoning map for every site: the zone label, height, lot coverage and side setbacks decide what you can build.
Going to the Committee of Adjustment adds roughly two months, but Noam recommends it when the extra density is worth it.
Design each unit with its own front entrance. Skipping shared entrances can remove a rear egress stair and the need for an accessible-unit platform lift, saving roughly $80,000 on the example he gave.
Parking is not required for a fourplex or sixplex in Toronto, so treat it as a business-case decision based on your tenant profile and transit access.
What lot size do you need for a Toronto multiplex?
Noam shared the minimums he uses as a screening guide, not hard rules. A 25-foot-wide lot lets you place two bedrooms side by side. In the floor plan comparison he showed, the side-by-side layout produced larger bedrooms and less wasted hallway than a layout with three bedrooms stacked along a corridor.
For depth, he looks for about 120 feet when building a fourplex with a garden suite and about 110 feet for a sixplex alone. His team has built a fourplex and garden suite on a 105-foot-deep lot, but it was compressed and did not make the most of the land. Context matters: near transit, where front setbacks can be small, smaller sites can work.
Apollo added that a good living layout reduces vacancy and improves tenant retention. In their experience, units where a sofa, TV and dining space actually fit are rare, and that is what makes a rental stand out. Three-bedroom units are in demand because most new rentals are one- and two-bedrooms, and a den or extra bedroom can be worth the effort when you look at the resulting cap rate.
How do you check zoning for a multiplex in Toronto?
Noam walked through the City of Toronto zoning map. Search the address, click the dot, and the summary box shows the zoning label, whether the site is on a major street, the maximum height and the lot coverage. Multiplexes are permitted as of right up to 10 metres in height.
Lot coverage: aim for about 30% for the multiplex. The garden suite does not count toward that figure, but a recent change caps combined coverage with the garden suite at 45%.
Side setbacks: these depend on the zone. RM zones are the most stringent at 1.2 metres per side, which takes about 8 feet off a 25-foot lot and usually means going to committee. In RD or RS zones the side yard is 0.9 metres.
Height: 10 metres is as of right, and Noam noted that 11 metres makes for better ceiling heights.
Rules change often, sometimes monthly, so confirm the current bylaw for the specific site.
Should you go to the Committee of Adjustment for a multiplex?
The Committee of Adjustment is where you ask for minor variances when a design goes beyond what the zoning allows. Noam said the usual answer is yes, go: it adds about two months, but the extra density generally pays for the delay. He cited City data showing 222 multiplex permits between May 2023 and July 2024, with only about 10% needing minor variances, mostly for side yard setbacks.
His Northcliffe project, near Vaughan Road and Oakwood Village, was a 24.5-foot-wide lot with an easement on one side. The team asked for the same setback the old bungalow had, an argument Noam says committees accept almost every time. They also showed that the steep slope reduced the garden suite's impact. The project passed unanimously with five variances for the fourplex and four for the garden suite. It ended up at about 4,150 square feet with 12 bedrooms and 8 bathrooms, plus a 690-square-foot, two-bedroom garden suite. The angular plane requirement was also recently removed.
How do you value engineer a multiplex without losing curb appeal?
Noam answered a question from an investor whose first architect designed something beautiful that cost far too much. His approach is to design to save money from the start and to find cheaper ways to keep the look.
Give every unit its own front door instead of a shared entrance. That can eliminate the rear egress staircase (about $50,000 to $60,000) and avoids the accessible-unit requirement that triggers a platform lift (about $30,000).
Keep the design features that matter for the neighbourhood, and find cheaper ways to achieve expensive details. For example, one client wanted a corner window that needed steel support, and the team looked for a lower-cost way to keep the same look.
Spend more on the facade and curb appeal in high-end areas, and less where the market will not reward it.
Is parking required for a Toronto multiplex?
No. Noam confirmed that parking is not required for a fourplex or sixplex. Whether to include it depends on your tenants. Apollo pointed out that a luxury laneway suite renting for $5,500 to $6,000 will usually need parking to attract that tenant. A parking pad outside a garage typically needs a variance, because Toronto's bylaw generally only allows parking on a driveway if there is a garage or carport to park in. Basement parking by ramp is possible when the lot is large enough, and Noam showed a project with a ramp to a two-car garage below grade.
What about accessibility and energy points for CMHC MLI Select?
Noam said none of his clients have used the accessibility route for MLI Select, because it is onerous and can compromise the layout. His team mostly designs for energy compliance, and occasionally affordability when a project has a small basement unit. Apollo's view was that accessibility adds cost without a return, that affordability hurts the numbers in Toronto, and that for new builds energy efficiency is the practical route. They described the energy target as close to what a well-built new multiplex does anyway, with triple-pane windows as the main extra cost. MLI Select program rules change, so check current requirements with a lender.
Can you build a four-storey multiplex on a major street?
Major street zoning allows up to six storeys or 18 metres. Above 18 metres, a building is treated as a high building with much heavier code requirements. Noam would expect a four-storey building to need an elevator, and a walk-up with four floors of groceries is a hard sell to renters. The group also covered the limits of major street projects:
Side setbacks are stricter and depend on the windows. A primary living space window on the side can require roughly 5.4 metres (about 15 to 16 feet), and a 1.5-metre strip of grass on both sides is also required.
Over 10 units, a site plan approval is needed. It takes about a year and involves fire, transportation and other consultants, so many developers stop at 10 units unless they can reach a much larger project.
Development charges: a seventh unit in a multiplex triggers charges on all of the units, which Apollo said could be about $50,000 per unit. Splitting a large lot into two multiplex sites can avoid that.
What should you know about severances and precedent?
When a lot could be split into two, Apollo and Noam look for precedent: other nearby lots with similar frontage. Check the minimum lot frontage in the zoning label (the "F" number, in metres). If neighbouring lots are as narrow or narrower, a severance carries less risk, although it is never guaranteed. They recommend speaking with a planner or the City before relying on a severance. The group also debated whether a garden suite is allowed on a lot with a sixplex; the rules are detailed, so verify the current bylaw for your site.
Who presented this Toronto multiplex architect webinar?
The webinar was hosted by the Apollo Realty Group team, who invest in Toronto multiplexes and help investors find sites, arrange financing and connect with builders, lenders and design professionals. The guest speaker was Noam, a Toronto architect and interior designer whose practice grew from custom homes into garden suites and multiplexes. The webinar also included a Q&A and a look at sites Apollo currently has on its radar.
This post summarizes what was discussed on January 20, 2026. Zoning bylaws, CMHC programs, costs and fees change often, and every site is different. Confirm the current rules with the City of Toronto, your lender and your architect before making a decision.
Ready to look at sites? Browse our hand-selected Toronto multiplex investment properties.
Examples of sites that fit the 6-plex plus garden or laneway suite layouts discussed here: Oakwood Village 6-plex + garden suite, Leslieville 6-plex + laneway suite, The Beaches 6-plex + garden suite, and Davenport 6-plex + laneway suite.
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