Most owners can quote what their building would sell for. Fewer can quote what keeping it will cost.
Written for owners twenty or thirty years into a building: the arithmetic of the next five years of ownership, the net of an exit, and a third option most conversations skip.
You have owned the building long enough that it mostly runs. The mortgage is small or gone, the tenants are long, and the income arrives whether or not you think about it. Which is exactly why the hold-or-sell question is hard to see clearly: nothing about the building forces the question, and most of the people raising it are paid on one side of the answer.
Including us: a brokerage is paid when a building trades. The answer sits in your rent roll, your capital plan and your family; the hold and the exit are each priced below.
The hold has a price.
For a long-tenured owner, holding has looked close to free: a paid-down mortgage, familiar expenses, rents that drifted up. Each of those inputs belongs in the hold's underwriting as a line item.
On an older building, insurance is no longer a rounding line: underwrite it from the current renewal quote, not from what it cost a decade ago.
A renewal reprices the debt at the rates of the day.
On a 1970s building, roofs, boilers, windows, plumbing stacks, balconies and electrical come due on their own schedule, several at six figures each. A paid-off mortgage does not change the schedule; a sale changes who pays.
Purpose-built rental vacancy rose to 3.1% nationally in October 2025, above its 10-year average (CMHC, October 2025 survey), amid historically high rental completions (CMHC, 2025 Rental Market Report). Asking rents on vacant units have been falling in Toronto and Ottawa, while older stabilized buildings remain tighter (CMHC, 2026 Mid-Year Rental Market Update). In Toronto, purpose-built rental apartment starts rose 82% in the first half of 2026 and outnumbered condominium apartment starts for the first time since 1994 (CMHC, Fall 2026 Housing Supply Report).
Ontario’s tenancy framework applies to every unit you own, and more tenancies mean more potential contact with it. Professional management changes the severity and cost of each incident — not the number of doors that can generate one.
None of these is an argument to sell; each is a line in the hold's underwriting.
Holding is a purchase
Every year you hold, you choose to buy the building again: at today's value, with your equity, at today's insurance, today's debt and today's place in the capital cycle.
If the building came to market today at its current value, with its current rent roll and its coming capital plan, would you buy it? If yes, the arithmetic that would price a sale supports the hold. If not, the gap can be measured, and is best measured before a boiler, a renewal date or an estate sets the timing.
What an exit costs
Canada has no 1031 exchange: a sale cannot be rolled into the next property untaxed. From price to net, three deductions:
Every dollar of capital cost allowance claimed over the decades comes back as ordinary income in the year of sale. A long, well-advised hold usually means a low UCC — which is exactly what makes the recapture large.
The lift above your original cost is a capital gain, half of it taxable at your rate (50% inclusion — the proposed increase was cancelled and never took effect).
Selling costs, mortgage payout and any penalty, legal.
A building bought decades ago for $1.2M, ground down to a $700K UCC, selling at $3.0M (the illustration assumes no land value, so the whole cost was depreciable): roughly $500K returns as recaptured income, $1.8M is capital gain with $900K taxable, and costs of sale stack on top. In this illustration the gap between price and net runs to the hundreds of thousands. The Disposition Proceeds Calculator estimates it in advance, from price to net: selling costs, payout, penalty, recapture and the gain. Your accountant confirms the figure.
Two things follow. First, your accountant should see your UCC position before you form a price expectation — not after an offer arrives. Second, structure is set before listing or not at all: share versus asset sale, entity questions, and timing can move the net materially, and they are decisions for your accountant and lawyer with the brokerage working alongside.
What preparation is worth
If the ledger points to a sale, this year or in five, preparation moves the net more than marketing does.
Buyers pay for what they can underwrite. A documented gap between in-place and market rents is value a buyer's lender can see; an undocumented one is a story. Normalized operating expenses let a buyer bid on the building instead of padding for uncertainty. An assembled capital history — what was done, when, and what remains — shrinks the diligence discount.
The option between hold and sell
One more branch, named because most conversations skip it: transition. Some buildings should pass to the next generation rather than to the market — and that path has its own structuring questions (timing, entities, estate mechanics) that reward the same early advisory work as a sale. Our own family has moved buildings between generations across three of them; it is why we will not tell you that selling is always the answer.
The Steward’s Guide
The owner's guide in full: the cost of holding, the cost of an exit, and the transition path. A PDF, by email.
For an owner weighing this, we do the underwriting: a confidential valuation built the way a buyer's lender would build it; the loss-to-lease and expense work that makes the building legible; and, if the ledger points to a sale, marketing to a buyer pool that already owns comparable buildings in comparable markets. Three generations of the McKinney family have bought, financed and brokered Ontario apartment buildings. Our fee attaches only to the sale we broker.