Occupation Rent: What a Locked-Out Co-Owner Actually Recovers

The situation

Karim, a police sergeant, and Alejandro, a physiotherapist, had been close friends for over a decade when they decided to buy a semi-detached house in Niagara Falls together. Neither could afford an investment property alone, but combined, their savings covered a solid down payment. The plan was straightforward: buy the house, rent it out, split the income and the mortgage paydown, and sell in a few years for a profit. They held title as co-owners, each with a 50% interest, and never wrote anything down beyond the closing documents.

Two years in, Alejandro's living situation changed. He and his partner, Gabriela, needed somewhere to live, and renting out their share of the Niagara Falls property to strangers while paying rent elsewhere themselves made little financial sense. Karim agreed, informally, that Alejandro and Gabriela could move into the house instead of tenants — on the understanding that Alejandro would pay Karim a fair market rent for Karim's half, since Karim was no longer getting any income from the property he still owned half of.

That understanding was never put in writing. For the first several months, Alejandro made occasional payments toward what he called "rent," though the amounts were inconsistent and never matched what the house could actually command on the open market. Then the payments stopped altogether. Alejandro kept paying the mortgage, property tax, and insurance — but nothing beyond that, and nothing to Karim. When Karim raised selling the house or at least being paid something for his share, Alejandro became evasive, then defensive, then stopped responding. Karim had no key, no access, and no income from an asset he still legally owned half of.

The legal problem

Karim came to Treadstone Law after roughly two and a half years of this arrangement, wanting to know two things: could he force a sale, and could he recover money for the years he had been shut out. Both questions had real but qualified answers.

In Ontario, a co-owner of property — whether the arrangement is between friends, family, or business partners — generally has the right to apply under the Partition Act for an order that the property be sold and the proceeds divided. Co-ownership does not require both owners to agree before one can force a sale; if the parties cannot agree between themselves, the law provides a route to end the arrangement. That gave Karim a clear path forward on the ownership question.

The money question was more nuanced. When one co-owner occupies a shared property exclusively and excludes the other from using it or benefiting from it, the excluded owner can often claim what is called occupation rent — compensation for the value of the exclusive use the other owner enjoyed. But occupation rent is not automatic, and it is not calculated in isolation. Ontario courts typically require an accounting of the whole relationship between the co-owners during the period of exclusive occupation, including any mortgage payments, property tax, insurance, and necessary repairs the occupying owner covered on their own. Those costs are set off against the occupation rent claimed, because it would be unfair to award one owner rent for the years they were excluded while ignoring that the other owner was carrying the full cost of the mortgage during that same period, protecting both owners' equity in the process.

That principle mattered enormously for Karim's case, because Alejandro had, in fact, kept paying the full carrying costs alone the entire time — he simply had not been sharing the property's use or its value with Karim. The claim was real, but it was not going to be a clean windfall.

What we did

1. Confirmed the ownership structure and pulled the title history. Before anything else, we confirmed exactly how the two men held title and gathered the closing documents from the original purchase, which set the baseline for each owner's 50% interest.
2. Sent a formal demand for access and accounting. Rather than starting with litigation, we wrote to Alejandro directly, setting out Karim's position: either restore Karim's access and share of the property's benefit, agree to sell, or account for what was owed. This step is often skipped, but it creates a clear record of when the exclusion was formally challenged, which matters later for calculating the period the claim covers.
3. Filed an application under the Partition Act when the demand went unanswered. Once it was clear Alejandro would not engage, we brought an application asking the Superior Court to order the property sold and the proceeds divided, with an accounting between the co-owners as part of the same proceeding.
4. Arranged an independent appraisal — both of the property's value and of fair market rent. To support the accounting claim, we needed two separate numbers: what the house was worth to sell, and what it would have rented for on the open market during the period Alejandro occupied it alone. Both required a qualified, independent appraiser rather than informal estimates from either side.
5. Compiled Alejandro's carrying-cost payments for the same period. Bank records and mortgage statements showed exactly what Alejandro had paid toward the mortgage, tax, and insurance over roughly thirty-four months of exclusive occupation — the figure that would be set off against any occupation rent owed to Karim.
6. Negotiated a settlement before the partition application reached a hearing. Once both sides had the appraisal and the accounting figures in hand, the outcome became largely a matter of arithmetic rather than argument, and we used that to push for a negotiated sale and payout rather than a longer, costlier court process.

The outcome

The independent appraisal valued the Niagara Falls property at about $720,000, with roughly $358,000 remaining on the mortgage, leaving net equity of about $362,000 — nominally about $181,000 for each owner. The appraiser also estimated fair market rent for the whole property at about $2,650 a month during the period in question.

The accounting told a more mixed story than Karim had hoped for. Over the roughly thirty-four months Alejandro occupied the property alone, Karim's 50% share of the fair market rent he had been denied worked out to about $45,000. But Alejandro had also been paying the full monthly carrying costs — mortgage, tax, and insurance, totalling about $2,850 a month — the entire time, of which Karim's own share would ordinarily have been about $48,500. Once Alejandro's excess contributions were set off against the occupation rent owed to Karim, the two figures nearly cancelled out, leaving Karim owing Alejandro a small net amount rather than receiving a payout.

The house was sold, and Karim received his roughly $181,000 share of the net equity, reduced by that small accounting adjustment and by his share of the legal and sale costs — landing at approximately $169,000 after everything was settled. It was a fair outcome given the asset, and it ended an arrangement that had dragged on far longer than it should have. But it was not the compensation Karim had been expecting when he first asked what "three years of being locked out" was worth. The carrying costs Alejandro had quietly paid on his own turned out to be worth almost exactly as much as the exclusive use he had taken.

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