Mortgage Insurance Rule Changes Enable Homeowners to Add Secondary Suites

Amy Kinvig • 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.


Amy Kinvig
By Amy Kinvig March 25, 2026
Don’t Forget About Closing Costs When planning to buy a home, most people focus on saving for the down payment. But the truth is, that’s only part of the equation. To actually finalize the purchase, you’ll also need to budget for closing costs —the out-of-pocket expenses that come up before you get the keys. Closing costs can add up quickly, which is why they should be part of your pre-approval conversation right from the start. Lenders will even require proof that you’ve got enough funds set aside. For example, if you’re getting an insured (high-ratio) mortgage, you’ll need at least 1.5% of the purchase price available in addition to your down payment. That means a 10% down payment actually requires 11.5% of the purchase price in cash to make everything work. Let’s break down some of the most common expenses you should prepare for: 1. Home Inspection & Appraisal Inspection : Paid by you, this gives peace of mind that the property is in good shape and doesn’t have hidden problems. Appraisal : Required by the lender to confirm value. Sometimes this is covered by mortgage insurance, sometimes by you. 2. Legal Fees A lawyer or notary is required to handle the title transfer and make sure the mortgage is properly registered. Legal fees are often one of the larger closing costs—unless you’re also responsible for property transfer tax. 3. Taxes Many provinces charge a property or land transfer tax based on the home’s purchase price. These fees can range from hundreds to thousands of dollars, so you’ll want to factor them in early. 4. Insurance Property insurance is mandatory—lenders won’t release funds without proof that the home is insured on closing day. Optional coverage like mortgage life, disability, or critical illness insurance may also be worth considering depending on your financial plan. 5. Moving Costs Whether you’re renting a truck, hiring movers, or bribing friends with pizza and gas money, moving comes with expenses. Cross-country moves especially can be surprisingly pricey. 6. Utilities & Deposits Setting up new services (electricity, water, internet) can involve connection fees or deposits, particularly if you don’t already have a payment history with the utility provider. Plan Ahead, Stress Less This list covers the big-ticket items, but every purchase is unique. That’s why it pays to have an accurate estimate of your personal closing costs before you make an offer. If you’d like help planning ahead—or want a breakdown tailored to your situation—let’s connect. I’d be happy to walk you through the numbers and make sure you’re fully prepared.
By Amy Kinvig March 18, 2026
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