Mortgage Insurance Rule Changes Enable Homeowners to Add Secondary Suites

Glenn Issler • January 2, 2025

As housing affordability challenges persist across Canada, innovative solutions are reshaping the way homeowners can contribute to housing supply. Starting January 15, 2025, new mortgage insurance rule changes will allow Canadian homeowners to access insured refinancing options to create secondary suites, such as basement apartments or laneway homes.


This move, announced in Budget 2024 and detailed by the Department of Finance Canada, is part of a broader strategy to increase housing density and improve affordability while offering homeowners the chance to generate additional income.


Why These Changes Matter

Historically, converting extra space into rental units has been both costly and mired in municipal red tape. Recent zoning reforms across Canada’s major cities, driven by Housing Accelerator Fund agreements, are reducing these barriers. The creation of secondary suites not only expands housing supply but also provides financial benefits to homeowners, such as offering seniors additional income to support aging in place.


Key Parameters for the New Rules

The new mortgage insurance program is designed to enable homeowners to build legal, self-contained secondary suites that comply with municipal requirements.


Here are the essential details:

Eligibility Requirements

Homeowners must already own the property.

The homeowner or a close relative must occupy one of the existing units.

Additional units must not be used as short-term rentals.


Project Specifications

New units must be fully self-contained with separate entrances (e.g., basement suites, laneway homes).

Up to four total dwelling units are allowed, including existing units.


Financial Parameters

The “as improved” property value must be less than $2 million.

Homeowners can refinance up to 90% of the property’s value, including the enhanced value from secondary suites.

The maximum amortization period is 30 years.

Additional financing must not exceed the project’s costs.


When Do These Rules Take Effect?

Starting January 15, 2025, lenders can submit applications for mortgage insurance under these updated parameters. This applies to all eligible properties across Canada, provided the new units align with municipal zoning requirements.


What This Means for Homeowners

For homeowners with underutilized space, such as basements or detached garages, this new program offers an opportunity to increase property value and create a source of long-term income. By building legal secondary suites, homeowners can contribute to Canada’s rental housing market while gaining financial security.


A Step Toward Housing Solutions

As housing supply remains a pressing issue, these mortgage insurance changes reflect a commitment to practical, homeowner-driven solutions. Whether you’re a senior looking to age in place or a family seeking to maximize your property’s potential, these changes represent an exciting opportunity to invest in your home and your community.

Stay informed and explore your options with your lender to determine if this program is right for you. The path to unlocking your property’s potential begins in 2025.


Glenn Issler

Mortgage Advisor

By Glenn Issler July 22, 2025
If you’ve been thinking about buying a second property and you’re looking to put some of the pieces together, you’ve come to the right place! Whether you’re looking to buy a vacation property, start a rental portfolio, or help accommodate a family member, there are many reasons to buy a second property (while keeping your existing property), which might make sense for you! Now, while there are many great reasons to buy a second property, there is also a lot to know as you walk through the process. The key here is to have absolute clarity around your why. Ask yourself, why do you want to buy a second property? This isn’t a decision to be taken lightly or one that should be made too quickly. Buying a second property should be a strategic decision that allows you to accomplish your goals, and it should include an assessment of your overall financial health. So with clear goals in mind, the best place to start the process is to have a conversation with an independent mortgage professional. This will allow you to assess your financial situation, outline the costs, and put together a plan to make it happen. While purchasing a second property is similar to buying a primary residence, there are some key differences. Just because you’ve qualified in the past for your existing mortgage doesn’t mean you’ll qualify to purchase a second property. One key difference is the amount of downpayment you might be required to come up with. A property that is owner-occupied or occupied by a family member on a rent-free basis will require less of a downpayment than if the second property will be used to generate an income. So, depending on the property's intended use, you might have to come up with as much as 25%-35% down. This is where strategic planning comes in. Consider unlocking the equity in your existing home to finance the downpayment to purchase your second home. Here are a few ways you can go about doing that: Securing a new mortgage if you own your property clear title Refinancing your existing mortgage to access additional funds Securing a home equity line of credit (HELOC) Getting a second mortgage behind your existing first mortgage Securing a reverse mortgage The conversation about buying a second property should include assessing your overall financial health, leveraging your existing assets to lower your overall cost of borrowing, and figuring out the best way to accomplish your goals. And as it's impossible to outline every scenario in a simple blog post, if you’d like to discuss your goals and put a plan together to finance a second property, connect anytime. It would be a pleasure to work with you. 
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