Before you list a duplex or triplex in Hamilton, get four things ready. You need signed leases, a rent record that matches your bank deposits, proof the units are legal, and a one-page sheet on meters and who pays which bills. Buyers have time to be picky right now. In September 2026, Hamilton homes took 44 days on market on average, and there were 2,529 homes for sale, according to our Hamilton market report for September 2026.
That many choices means a buyer will pass on a building with a messy file. Often the buyer's bank will pass first.
I'm Mike Johnson. I've been a listing Realtor since 2017 and have sold more than 300 properties across Hamilton, Stoney Creek, Ancaster, Flamborough, Burlington and into Niagara. I also own multi-family property in Hamilton myself. So I've sat on both sides of this file. My view, and some agents will argue with it: for a 2 to 4 unit building, a clean paper file is worth more than a fresh coat of paint. Here's why, and what to pull together this month.
The buyer's bank reads the rent before it reads the house
Most people who buy a duplex or triplex need a mortgage. The bank (the lender) decides how much to lend partly on the rent your units bring in. So your rent is part of the buyer's income on paper.
The rules from CMHC, the national housing agency, change with the number of units:
- Two units: up to 100% of the full rent from the other unit can count toward what the buyer can borrow. The buyer can put down as little as on a regular house, 5% on the first $500,000.
- Three or four units: the buyer needs at least 10% down. Only up to 50% of the full rent (or the rent after costs) can count.
The bank can only count rent it can see on paper. If your tenant pays $1,800 but there's no lease, or the lease says one thing and the deposits say another, the bank may count less rent, or none, and suddenly a buyer who loved your building can't borrow enough to buy it.
For a sense of what a unit rents for, the median asking rent for a self-contained unit in Hamilton was $1,800 a month over the twelve months to October 23, 2026. Those units took a median of 14 days to lease. That's asking rent from listings on both boards, not signed leases. It's useful as a check, but your file has to show what your tenants actually pay.
The takeaway: the buyer's bank decides how much the buyer can spend, and it decides from your paperwork.
Leases: signed, on the right form, and matching what's paid
Start with the leases. Find every one.
In Ontario, most residential leases signed since April 30, 2018 must use the province's Standard Form of Lease. If yours is a homemade lease or a handshake, that's common with long-term tenants. It's fixable. A tenant can ask for the standard form at any time, and you can offer it too. Having it signed before you list is far easier than chasing it with a buyer waiting.
Things I check on every lease:
- The rent amount matches what the tenant pays today.
- It says who pays hydro, gas and water.
- It shows the start date, so a buyer can tell if the tenancy is now month to month.
- Any parking, storage or laundry is written down, along with what it costs.
That third point matters more than people think. A tenancy that has passed its first term usually rolls into month to month on its own. That affects what a buyer can do later, which I'll get to below.
One more. If a lease is missing a page, or the tenant's name is spelled two ways, fix it now.
A rent ledger that matches the bank
A rent ledger is just a list of every rent payment: date, amount, which unit. Plenty of landlords keep it in their head. A buyer's bank won't accept that.
The first thing I ask a landlord for, before I ever talk about price, is twelve months of bank statements with each rent deposit highlighted. Then I lay those beside the leases. If they match, we're in good shape. If they don't, I'd rather find out at the kitchen table than in the middle of a deal.
Picture a triplex on the Mountain with three good tenants. Two pay by e-transfer. One has paid cash for years, and the owner rounds it down in his head because he likes the guy. The buyer's bank asks for proof of rent. Two units show clean deposits, and the third shows nothing at all. The bank counts two units of rent, the buyer can't borrow enough, and the owner is either cutting the price or starting over. A simple monthly receipt for the cash tenant, started a year earlier, would have saved the whole thing.
Some quick fixes you can do this month:
- Ask any cash-paying tenant to switch to e-transfer. It protects them too.
- Write receipts for any cash already paid and keep copies.
- Put any late payments or arrears (rent owed but not paid) in writing with dates. A buyer will find out anyway, and it's better coming from you.
- List each last month's rent deposit and the interest you've paid on it. In Ontario, landlords owe yearly interest on that deposit at the rent increase guideline rate.
Permits and the legal unit question
This is the part of the file that moves price the most.
Buyers compare multiplexes by price per unit. Our Hamilton duplex, triplex and fourplex report shows a median asking price of $749,900 for an up-and-down duplex ($374,950 per unit, 119 listings in 12 months). It shows $799,900 for a triplex ($266,633 per unit, 66 listings). Those are asking prices, not sales. They still tell you how buyers think. They divide by the doors.
So if your "triplex" is really a legal duplex with a basement unit nobody permitted, a careful buyer will price it as a duplex. Their bank may not count the basement rent at all.
What to gather:
- Building permits for any second or third unit. Ask the City of Hamilton's building department for the permit history on your address. Do it early, because records requests take time.
- Fire safety sign-off. Ontario's Fire Code has specific rules for houses with two units, covering things like fire separation and smoke alarms between units. A fire inspection letter is strong proof.
- Zoning. Some older Hamilton buildings have had extra units for decades without modern permits. Sometimes the use is legal because it predates the rules, and sometimes it isn't. Your lawyer or a planner can tell you which, and a buyer's lawyer will ask.
I don't think an unpermitted unit has to sink a sale. But it has to be priced honestly from day one. Listing as a triplex, then dropping to a duplex price after a buyer's lawyer finds the gap, is one of the main reasons I see multi-unit listings come off and relist. Buyers notice relists. If you want to run the numbers the way a buyer's side will, our underwriting standard walks through price per door and the costs we assume as a share of rent.
Meters and who pays what
The meter question is small, and buyers ask it in the first five minutes of a showing.
Separate hydro meters for each unit are a real plus. Each tenant pays their own bill, and the buyer's costs are clear. Shared gas is common in older Hamilton houses with one furnace. That's fine, but the buyer needs to know you pay it, and roughly how much.
Make a one-page sheet:
- Which units have their own hydro meter
- Whether gas is shared or split
- Water, which usually stays in the owner's name
- The last twelve months of bills for anything the owner pays
Then check it against the leases. If a lease says the tenant pays hydro but the unit is on your meter, that's a conflict a buyer's lawyer will flag. Better to sort it with the tenant now, in writing.
This sheet lets a buyer work out what's left after bills. That number decides how much they'll pay you, and I'd rather they work from your real bills than from a guess that runs high.
Tenanted or vacant: decide before the file goes out
Some landlords assume they'll get more if the building is empty. Sometimes that's true and sometimes it isn't. It depends on who's likely to buy.
An investor often wants the tenants. Steady rent on day one is the point. A buyer who plans to live in one unit wants at least one unit empty. That's the house hacking buyer: they live in one unit and the rent from the others helps pay the mortgage.
The law sets the order of things:
- A sale doesn't end a tenancy. The tenants stay unless they leave by agreement or a proper notice.
- An N12 (a notice that the buyer will move in) only works for a buyer's own use, on a month-to-month tenancy. It comes with the compensation the Act requires, which is one month's rent.
- An N11 is an agreement where the tenant chooses to leave, usually for a payment you negotiate together.
I price both versions side by side, tenanted and vacant, using sales from both boards that list Hamilton homes. Then the owner decides with real numbers. Getting this choice right is a big part of how I help landlords on our Hamilton investment properties page. Getting it wrong is the other big reason listings relist. Someone lists "vacant on closing" without a signed N11 in hand, the tenant says no, and the deal falls apart.
Talk to your tenants early and kindly. They're the ones letting buyers through the door.
Questions people ask
Can I raise the rent before I list to get a higher price for my Hamilton duplex?
Only within the rules. For most units, you can raise rent once every 12 months, with 90 days' written notice on the N1 form, up to the provincial guideline. Units first lived in after November 15, 2018 are generally exempt from the guideline, but the 12-month and 90-day rules still apply.
What happens to my tenants' last month's rent deposit when I sell?
It goes to the buyer on closing. Your lawyer shows it as a credit to the buyer on the closing statement. Any interest you still owe the tenant on that deposit should be settled or credited too, so the buyer starts clean.
Do my tenants have to let buyers in for showings?
Yes, with proper notice. You must give at least 24 hours' written notice, and the visit has to happen between 8am and 8pm. Grouping showings into a few set windows each week is easier on tenants. Tenants who feel respected usually keep the place looking its best.
Find out what your building would sell for
If you own a duplex, triplex or fourplex in Hamilton and you're thinking about selling, start with one quick step. Get your instant home evaluation to see what your building would sell for based on homes like yours that sold nearby. It takes about a minute. When you want to go through your leases and rent record together, you can reach me directly on my page, Mike Johnson at Found Spaces.