Sandy Hill: students on one side of the lease, landlords on the other

On the student side of a Sandy Hill lease, rent is not a federal deduction, but it does feed an Ontario credit, and the return that matters is the one that records tuition correctly so the credit survives into the earning years. On the landlord side, rental profit is the rent minus the deductible expenses, and the mortgage principal is not one of them. Those two sentences account for most of the errors made on this street, in both directions.

Sandy Hill is organised around a single lease. On one side are the University of Ottawa students filling the converted houses and rooming units within walking distance of campus. On the other are the owners who bought those houses to rent by the room. It is one of the few neighbourhoods in the city where the tenant and the landlord both have a tax story worth telling, and neither usually understands the other’s. The student thinks the landlord is minting money. The landlord is often running a thin operation with obligations the student never imagines. Both file a return the other side never sees.

The student side: credits, not deductions

Most uOttawa students arrive at their first real tax return convinced rent is deductible. Federally it is not. What matters for a student is a different machine: tuition. The tuition paid to the university generates a tuition tax credit, and in a year with little or no income there is often not enough tax to absorb it. The credit is not lost. The CRA’s rules on transferring and carrying forward let the unused amount roll forward indefinitely to a year when the graduate is earning, or let a limited portion be transferred to a supporting parent, grandparent or spouse for the current year only. That distinction is the one that costs money: a carried-forward amount waits for you, a transfer is use it now or lose the chance. The student return that matters is not the one that produces a refund now, it is the one that files the tuition amounts correctly so the carry-forward is preserved. The mechanics are set out in the student tax credits guide.

Rent does do one thing, and it is provincial. Rent paid for your principal residence in Ontario, where the unit is subject to municipal or school property tax, is eligible rent for the Ontario Energy and Property Tax Credit, which you claim on Form ON-BEN with your return and which is paid out through the Ontario Trillium Benefit. A converted house on Osgoode or Russell qualifies. A designated university residence does not work the same way: you tick a different box and the CRA substitutes a flat amount rather than what you actually paid. A student who moves out of residence and into a Sandy Hill rental mid-degree should expect the claim to change shape.

The other thing worth filing for is nothing at all. A student with almost no income still benefits from filing, because it is filing that switches on the Canada Groceries and Essentials Benefit, which is what the GST/HST credit was renamed to in July 2026, and the other benefit payments calculated from the return. There is no application for it, as the benefit eligibility rules explain, so a Sandy Hill student who skips filing because they “made nothing” is usually leaving quarterly payments on the table. The income was low. The reason to file was never the income.

Two more items catch uOttawa students specifically. Interest on a government student loan generates its own credit, but only interest on a loan made under a federal or provincial student loan statute qualifies, not a line of credit or a loan from a parent, so refinancing a student loan into a bank line of credit permanently destroys the credit on that balance. And a student who moved at least 40 kilometres closer to a new work location for a co-op term or a summer job may have a moving expenses claim, though it is deductible against the income earned at the new location rather than against nothing at all. These are not large refunds on their own, but for a filer whose whole tax life is still being set up, filing them correctly the first time keeps the carry-forwards and credits intact for the years that will actually be taxed.

The landlord side: rental income is not rent minus mortgage

Across the lease, the Sandy Hill landlord has the more complicated return, and the most common error is arithmetic. Rental profit is not the rent collected minus the mortgage payment. The CRA’s list of deductible rental expenses includes the interest portion of the mortgage and not the principal. So a landlord who nets the whole payment against the rent is overstating expenses by the principal every month and understating taxable income by the same amount, which is exactly the kind of gap that does not stay hidden once a mortgage statement is requested.

A rooming-style house rented by the room brings its own issues. Expenses that serve the whole building, property tax, insurance, heat and repairs, are deductible against the rental income, but where the owner also lives in part of the house the costs have to be apportioned between the rented and personal space on a reasonable basis, usually floor area or room count, applied consistently year to year. Capital spending is separated too: a repair that keeps the place running is a current expense, while an improvement that betters the property beyond its original condition is a capital cost deducted gradually through capital cost allowance. A new furnace and a fixed furnace are not treated the same way, and in the older Sandy Hill housing stock that distinction comes up constantly. The general approach is in the Ottawa rental property accounting guide, and an owner-occupied split follows the same logic as a basement suite.

Claiming capital cost allowance on the building is optional, and on a part-personal property it is usually the wrong call, because it can compromise the principal residence exemption on the part of the house you live in and it creates a recapture on sale. It is one of the few places where the deduction available this year is worth less than the problem it creates later.

The same lease, from both ends

Where the two sides touch the same rules from opposite ends

The lease connects two returns that pull in opposite directions on the same facts. The rent that is merely a cost of being a student is taxable income to the owner receiving it. The house that is a business asset to the landlord is just a place to sleep for the tenant. And the building itself carries a landlord-only trap at the far end: a rental property is not a principal residence, so the exemption does not shelter the gain on the rented portion when it sells. If the owner lived in it for a stretch before renting it out, that switch is a change of use that can trigger a deemed disposition at fair market value on the day the tenant moves in, with an election available in some cases to defer the consequence. The election has to be filed. It is not granted by default, and it cannot usually be fixed years later without asking for relief.

The tax law across this lease is identical to the law anywhere else in Ottawa. What makes Sandy Hill specific is the density of the two roles pressed against each other, a student body from uOttawa that mostly under-files, and a landlord base that mostly over-deducts, block after block. Getting either return right starts with knowing which side of the lease you are on, because the same house is a credit to preserve for one filer and a business to report accurately for the other.

If you are renting or renting out in Sandy Hill and want the right side of that handled properly, whether that is a first student return with tuition to carry forward or a rooming house with a repair-versus-capital question and a change-of-use decision coming, send me the details and the documents and I will tell you what the return should actually say.