![[Project photo] Front of the converted house, placeholder image](/_astro/project-a-1.DX-mGepn_Z1DVonW.webp)
Real photo Conversion · [Neighbourhood]
[Project A: fourplex conversion]
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- Completion
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Completed
Toronto multiplex builder
Turn one house into the homes Toronto needs.
We design and build multiplex conversions, additions, and new builds. Full-scope delivery from initial zoning check to tenant move-in.
![[Hero photo] Placeholder image of a Toronto multiplex](/_astro/hero.CjMyccQQ_Z1UcST6.webp)
Current zoning and tax policies favour small rental builds.
Last updated November 11, 2026 · For reference only
- Multiplexes of up to four units are permitted in residential neighbourhoods citywide
- 4 units TODO: verify
- Source City of Toronto: Multiplex housing
- Sixplexes permitted in Toronto and East York wards plus Ward 23
- 6 units TODO: verify
- Source City of Toronto: Expanding Housing Options in Neighbourhoods
- HST relief on qualifying new purpose-built rental housing (federal + Ontario)
- Up to 13% TODO: verify
- Source Government of Ontario: Building more homes (HST relief on purpose-built rentals)
- Development charges waived for up to six units on a lot (conditions apply)
- $0 DCs TODO: verify
- Source City of Toronto: Development charges FAQ
- CMHC MLI Select financing for qualifying 5+ unit rental builds
- 50-yr amort. Up to 95% LTV TODO: verify
- Source CMHC: MLI Select
Convert, add on, or build new
All services →-
01
Direct conversion
Keep the existing structure and divide it into self-contained units, with new fire separation, sound control and services.
- Timeline
- 6–9 mos [TODO]
- Key scope
- OBC fire separation, HVAC split, underpinning
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02
Addition & extension
Add a storey, extend the footprint, or both, then convert. The foundation is assessed first and reinforced where needed.
- Timeline
- 10–14 mos [TODO]
- Key scope
- Rear extension, 3rd storey, structural tie-in
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03
Demolish & build new
Replace the house with a new building designed around the units, on new foundations with modern systems.
- Timeline
- 12–16 mos [TODO]
- Key scope
- Max lot coverage, 4–6 units + laneway suite
- 04
Garden & laneway suites
A detached home in the backyard or on the laneway, built on its own or alongside a multiplex.
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Feasibility & advisory
A clear answer on what you can build and whether it pays, before you commit.
Recent work
Real photo / Rendering labelled All projects →
Real photo ![[Rendering] Street view of the proposed building, placeholder image](/_astro/project-b-1.B4Yl1OKX_ZzAMHn.webp)
Rendering New build · [Neighbourhood]
[Project B: sixplex new build]
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- [Units]
- Area (sq ft)
- [Sq ft]
- Completion
- [Expected year]
Under construction
From zoning check to occupancyTODO: verify
- 1
Week 1
Free consultation & site check
We review your address, zoning, lot size and goals, and tell you honestly whether a multiplex makes sense.
- 2
Weeks 2–4 [TODO]
Feasibility study
Unit count options, a preliminary budget range, rent assumptions and a go / no-go recommendation.
- 3
Months 2–6 [TODO]
Design & permits
Architectural and engineering drawings, zoning review, any Committee of Adjustment variances, then the building permit.
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Months 6–14 [TODO]
Construction
Fixed scope and schedule, weekly updates, City inspections at each stage.
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On completion
Handover & lease-up
Final inspections, occupancy, warranty documents, and help with financing and leasing if you need it.
Example numbers
How the numbers fit together
A simplified example of how a multiplex project is evaluated. Every figure will be replaced with data from a real, documented project.
Try the return calculator →| Item | Amount |
|---|---|
| Purchase price | [placeholder] |
| Construction budget | [placeholder] |
| Monthly rent, all units | [placeholder] |
| Annual operating costs | [placeholder] |
| Net operating income (NOI) | [placeholder] |
| Value at completion (NOI ÷ cap rate) | [placeholder] |
| Cash out at refinance | [placeholder] |
| Equity left in the project | [placeholder] |
Client stories
What owners say
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“[Client testimonial placeholder. Real, approved quotes only]”
[Client name] [Neighbourhood · project type] -
“[Client testimonial placeholder. Real, approved quotes only]”
[Client name] [Neighbourhood · project type] -
“[Client testimonial placeholder. Real, approved quotes only]”
[Client name] [Neighbourhood · project type]
What is a multiplex?
A multiplex is a residential building with two to six self-contained units on one lot, for example a duplex, triplex, fourplex or sixplex. Each unit has its own kitchen, bathroom and entrance, and the units share the lot.
Can I build a fourplex or sixplex on my lot?
Fourplexes are generally permitted in residential neighbourhoods across Toronto. Sixplexes are currently permitted only in certain wards. Lot size, frontage, height, setbacks and heritage status all matter, so every address needs its own zoning check. (TODO verify against the City's current by-law.)
Should I convert my existing house or build new?
It depends on the condition of the structure, ceiling heights, foundation, and how many units you want. Converting is often faster and cheaper per unit; a new build gives you full control of layout and can reach the maximum unit count. A feasibility study compares both with real numbers for your property.
How long does a multiplex project take?
As a rough guide, design and permits take several months, and construction takes several more, depending on scope. We give you a project-specific schedule after the feasibility study. (TODO verify ranges with company project data.)
How much does a multiplex cost to build?
Costs vary widely with scope, finishes, site conditions and unit count. We do not publish a single number because it would be misleading. The feasibility study gives you a budget range for your specific property.
Do I have to pay development charges?
The City of Toronto has waived development charges for many small multiplex projects and offers a deferral program for qualifying garden and laneway suites. Eligibility rules apply, so confirm with the City for your project. (TODO verify current rules.)
Free guide
Get the Toronto multiplex guide
A plain-language guide to planning a multiplex in Toronto. Add your property address and we will also send a quick note on what is likely possible on your lot.
- Fourplex and sixplex rules, and where they apply
- Conversion vs. addition vs. new build
- Budget and timeline template
- Financing and incentive programs to look into
From the blog
Latest articles
![[Article cover] Placeholder image](/_astro/blog-rules.DXjmqMOk_Zs32jC.webp)
Rules & zoning
Fourplex and sixplex rules in Toronto: what you can build and where
A plain-language overview of Toronto's multiplex permissions (fourplexes citywide, sixplexes in selected wards) and what to check for your lot.
![[Article cover] Placeholder image](/_astro/blog-costs.CryEbzjy_1g7I1F.webp)
Costs & timelines
Multiplex costs and timelines in Toronto: how to plan your budget
The cost categories and project stages behind a Toronto multiplex, with a template you can fill in once you have real quotes.
![[Article cover] Placeholder image](/_astro/blog-financing.BFwGsM3N_Z297BLe.webp)
Financing
Financing a Toronto multiplex: CMHC MLI Select explained
How CMHC's MLI Select program works for rental buildings of five or more units, what the points system rewards, and the questions to ask your lender.
Find out what your property can become
Tell us your address. We will check zoning, outline your options and give you an honest view on whether a multiplex makes sense. Free, with no obligation.