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Thinking about adding more living space to your property or investing in a multi-unit home? A new City of Toronto initiative could make the process easier and more affordable.
On October 2, 2026, the City of Toronto announced an expansion of its Pre-Approved Building Plans Program, introducing free building designs for fourplexes and sixplexes.
The goal is simple: help homeowners and investors build more housing without having to start the entire design process from scratch.
🏘️ What Are Fourplexes and Sixplexes?
A fourplex is a residential building with four separate housing units, while a sixplex contains six.
These properties can offer several benefits, including:
Creating additional rental housing.
Providing opportunities for rental income.
Offering more housing options for extended or multigenerational families.
Making better use of existing residential land.
For homeowners with suitable properties, building multiple units could open up new possibilities.
🏗️ What's Changing in Toronto?
Previously, homeowners looking to build a multiplex would typically need to hire a designer or architect to develop building plans from the beginning.
Now, Toronto is offering free, pre-reviewed building designs that can help simplify the early planning stages.
The new designs include options for both narrow and wide lots, making them suitable for different types of Toronto neighbourhoods.
They also consider important features such as accessibility, energy efficiency, bicycle parking, waste storage and construction costs.
By using an existing design, homeowners may be able to save time and reduce some upfront design expenses.
📍 Can You Build a Fourplex or Sixplex on Your Property?
Not every Toronto property qualifies for the same type of development.
Here's what homeowners should know:
Fourplexes: Generally permitted across Toronto, subject to applicable zoning and building requirements.
Sixplexes: Permitted in certain areas, depending on the property's location and zoning rules.
If your proposed building meets the applicable zoning requirements, you may be able to apply directly for a building permit without seeking approval from the Committee of Adjustment.
However, factors such as lot size, building placement, setbacks and other regulations still need to be considered.
Before making any development plans, it's important to confirm what your specific property allows.
📋 Do You Still Need a Building Permit?
Yes! Using a pre-approved design does not mean construction can begin immediately.
Homeowners must still apply for a building permit and work with a qualified design professional to prepare the required property-specific documents.
The advantage is that the standard building design has already been reviewed by the City.
When applying, homeowners can reference the selected plan number rather than submitting the full pre-approved design again.
Keep in mind that if you make changes to the original design, including plumbing or HVAC modifications, the plan will no longer qualify for the streamlined pre-approved process. A regular review would then be required.
💰 What Does This Mean for Toronto Homeowners and Buyers?
This program could create new opportunities for people looking to get more value and flexibility from their properties.
For current homeowners: If you have a suitable lot, you may have an opportunity to add residential units without starting the building design process from zero.
For homebuyers: Properties with multiplex development potential may be worth considering, especially if you're interested in future rental income or multigenerational living.
For real estate investors: The availability of free building plans could help reduce some initial planning expenses when exploring multi-unit residential projects.
However, building a multiplex is still a significant investment. Construction costs, financing, zoning requirements and potential rental income should all be carefully evaluated before moving forward.
🔑 In A Nutshell
Toronto's new pre-approved multiplex designs are another step toward increasing housing options across the city.
For homeowners, buyers and investors, this initiative could make it easier to explore the possibility of turning a residential property into a multi-unit home.
While the program doesn't eliminate building permits or guarantee that every property qualifies, it provides a helpful starting point for anyone considering residential development.
Thinking about buying a property with rental potential or exploring what you can do with your current home? Working with a knowledgeable real estate professional can help you better understand your options and make informed decisions.
📌 Learn more and explore the free building plans: City of Toronto Pre-Approved Building Plans
Source: City of Toronto, “City of Toronto Introduces Pre-Approved Multiplex Designs, Making It Easier to Build More Homes Faster”, October 2, 2026. Toronto.ca
