Mortgage Insurance Rule Changes Enable Homeowners to Add Secondary Suites

Niki Cuthbert • 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.


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By Niki Cuthbert July 23, 2025
If you’re new to the home buying process, it’s easy to get confused by some of the terms used. The purpose of this article is to clear up any confusion between the deposit and downpayment. What is a deposit? The deposit is the money included with a purchase contract as a sign of good faith when you offer to purchase a property. It’s the “consideration” that helps make up the contract and binds you to the agreement. Typically, you include a certified cheque or a bank draft that your real estate brokerage holds while negotiations are finalized when you offer to purchase a property. If your offer is accepted, your deposit is held in your Realtor’s trust account. If your offer is accepted and you commit to buying the property, your deposit is transferred to the lawyer’s trust account and included in your downpayment. If you aren’t able to reach an agreement, the deposit is refunded to you. However, if you commit to buying the property and don’t complete the transaction, your deposit could be forfeit to the seller. Your deposit goes ahead of the downpayment but makes up part of the downpayment. The amount you put forward as a deposit when negotiating the terms of a purchase contract is arbitrary, meaning there is no predefined or standard amount. Instead, it’s best to discuss this with your real estate professional as your deposit can be a negotiating factor in and of itself. A larger deposit may give you a better chance of having your offer accepted in a competitive situation. It also puts you on the hook for more if something changes down the line and you cannot complete the purchase. What is a downpayment? Your downpayment refers to the initial payment you make when buying a property through mortgage financing. In Canada, the minimum downpayment amount is 5%, as lenders can only lend up to 95% of the property’s value. Securing mortgage financing with anything less than 20% down is only made possible through mortgage default insurance. You can source your downpayment from your resources, the sale of a property, an RRSP, a gift from a family member, or borrowed funds. Example scenario Let’s say that you are looking to purchase a property worth $400k. You’re planning on making a downpayment of 10% or $40k. When you make the initial offer to buy the property, you put forward $10k as a deposit your real estate brokerage holds in their trust account. If everything checks out with the home inspection and you’re satisfied with financing, you can remove all conditions. Your $10k deposit is transferred to the lawyer’s trust account, where will add the remaining $30k for the downpayment. With your $40k downpayment made, once you sign the mortgage documents and cover the legal and closing costs, the lender will forward the remaining 90% in the form of a mortgage registered to your title, and you have officially purchased the property! If you have any questions about the difference between the deposit and the downpayment or any other mortgage terms, please connect anytime. It would be a pleasure to work with you.
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