Claiming the MHRTC: A Step-by-Step for Garden Suite Families
The MHRTC can put $7,500 back in a family’s pocket for building a suite for a senior or disabled relative. Here’s how to actually claim it, step by step.
What the MHRTC Actually Pays
The Multigenerational Home Renovation Tax Credit, or MHRTC, is a federal refundable credit built specifically for households adding a self-contained secondary unit so a senior or a person with a disability can live with family. Because it’s refundable, it pays out even if you owe little or no federal tax for the year, which sets it apart from most renovation-related credits and makes it genuinely useful for retirees on a fixed income. The credit is worth up to 15 percent of qualifying renovation expenses, to a maximum of $50,000 in eligible costs, for a maximum credit of $7,500. For a family adding a garden suite specifically so a parent or an adult relative with a disability can live close by, the MHRTC is one of the few financing tools that returns real cash rather than simply extending how much you can borrow.
Who Qualifies: The Two-Part Test
To qualify, the completed suite must be a self-contained secondary unit with its own private entrance, kitchen, and bathroom, built so a qualifying individual can live with an eligible relative. A qualifying individual is either someone 65 or older by the end of the renovation year, or an adult eligible for the Disability Tax Credit. The eligible relative claiming the credit is generally a parent, grandparent, child, grandchild, sibling, aunt, uncle, niece, or nephew of the qualifying individual, which covers most of the multigenerational households actually building garden suites across the GTA. Confirm both pieces before you count on this credit: the person moving in needs to genuinely meet the age or disability criteria, and the person claiming needs to be within the eligible relationship categories the CRA recognizes, not simply anyone sharing the household.
What Counts as an Eligible Expense
Eligible expenses cover the renovation itself: labour, building materials, fixtures, equipment rentals, permits, and professional design or engineering fees tied directly to creating the secondary unit. What doesn’t count is just as important: routine maintenance, household appliances and furnishings, and financing costs like mortgage interest are all excluded from the $50,000 eligible-expense total. Keep every invoice and receipt organized by category as the project proceeds rather than trying to reconstruct them at tax time, since the CRA can request documentation supporting the claim. A garden suite built for a qualifying senior or DTC-eligible adult will typically exceed the $50,000 eligible-expense cap easily on its own construction costs, which means the practical planning question isn’t whether you’ll hit the cap, it’s making sure every eligible dollar spent is actually documented and claimable when you file.
Claiming It in the Right Tax Year
The MHRTC is claimed on the personal income tax return for the tax year in which the renovation was completed, not the year construction started or the year expenses were paid if that differs from completion. For a project spanning parts of two calendar years, which is common given six-to-ten-month custom timelines, this means gathering receipts across both years but filing the claim only once, in the year the suite passes final inspection and becomes habitable. Filing before the suite is genuinely complete, or claiming expenses from a year that doesn’t match the completion date, is one of the more common errors that can delay a refund while the CRA requests clarification, so aligning your claim year with your actual substantial-completion date matters more than it might first appear.
Once Per Person, and How It Interacts With Other Programs
The MHRTC can generally be claimed only once per qualifying individual, so it rewards getting the project right the first time rather than treating it as a renovation credit you can lean on repeatedly. It’s also worth noting this is a federal credit, separate from any Ontario HST rebate program or the federal HST New Residential Rental Property Rebate that applies specifically to rental suites, since a suite built for a qualifying family member to live in generally isn’t being rented at arm’s length in the first place. Because the MHRTC, HST treatment, and any provincial programs interact differently depending on your household’s exact structure, confirm your specific eligibility and how to file the claim with your accountant before you count the $7,500 into your overall project budget.
Making Sure You Don’t Leave Money on the Table
A garden suite built for an aging parent or a family member with a disability already tends to include the design features, wider doorways, curbless showers, single-level living, that the MHRTC’s qualifying-unit definition expects, so most in-law or accessible suites naturally satisfy the credit’s construction requirements without extra design compromise. Where families sometimes leave money on the table is documentation: without organized receipts and a clear paper trail tying costs to the secondary unit specifically, a legitimate $7,500 claim can become a slower, more contested one at filing time. Building a simple expense log from day one of construction, alongside your regular project files, is a small habit that protects a credit worth real money to families who are often managing a caregiving transition and a construction project at the same time.
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