If you’re a homeowner working out what your suite would earn — the reliable method is to compare current local listings for equivalent legal units, anchored against CMHC’s Rental Market Report for your centre. A legal, self-contained basement suite typically rents for a meaningful share of a comparable one-bedroom in the same market, and below an equivalent above-grade unit.
- Research your own market: CMHC as the anchor, live local listings as the check
- A below-grade unit rents below an equivalent above-grade one — always adjust down
- Legal suites command more and are the only ones a lender will count income from
- What raises rent: separate entrance, laundry, parking, natural light, sound separation
- Net off vacancy, utilities, maintenance and tax before calling it income
This guide is for the homeowner setting a rent — someone deciding whether a suite is worth building, or pricing one they’ve just finished. (If you’re looking for a place to rent, this isn’t that guide.)
Rent is the number that decides whether the whole project works. It’s also the only major input you can research properly, for free, before spending anything — which makes it the best hour you’ll spend.
How to research your own market
Three sources, used together. Don’t rely on any one.
1. CMHC’s Rental Market Report — your anchor.
CMHC’s Rental Market Report is the authoritative Canadian source, publishing average rents and vacancy rates by centre and by unit type. Look up your own centre — Toronto, Vancouver, Surrey, Burnaby, Calgary, Edmonton — and note the average for the bedroom count you’re building.
Then adjust downward. CMHC’s figures cover purpose-built rental apartments. A basement suite is a different product and typically sits below the average for its bedroom count. Treat CMHC as a ceiling and a sanity check, not as your number.
Also note the vacancy rate. It tells you how much pricing power you’ll have. Vacancy rates across major Canadian centres rose through 2025 and into 2026, easing a very tight market — which means more time between tenants than owners got used to.
2. Live local listings — your real number.
Search current rental listings within a few kilometres of your address for basement suites or basement apartments specifically, at your bedroom count. This is the closest thing to your actual market.
What to record for each: monthly rent, bedroom count, approximate size, whether it has a separate entrance, whether laundry and parking are included, and whether the listing says “legal.” Ten comparable listings gives you a defensible range.
A useful discipline: look at what’s still listed after a few weeks versus what disappeared quickly. Units that let fast are priced right; units lingering are priced above market. That tells you more than the asking prices alone.
3. Ask a local property manager or agent.
A five-minute conversation with someone letting units in your neighbourhood is worth a lot of desk research. They’ll know what’s actually achieving, as opposed to what’s being asked.
What not to use: a national average, a figure from an article, or what your neighbour said they got three years ago.
What raises rent
In rough order of impact on a basement suite specifically:
A genuinely separate entrance. The single biggest driver. A tenant who has their own door — rather than walking through a shared laundry room or past your kitchen — is renting a home rather than a room in your house. This shows up in the rent immediately.
Natural light. Below grade, this is what separates a good suite from a grim one. Larger egress windows serve the code requirement and the rent. Where the layout allows, putting living space against the windows rather than bedrooms is worth doing.
In-suite laundry. Consistently near the top of tenant priorities, and comparatively cheap to provide when you’re already running plumbing.
Parking, where the local market is short of it. In some neighbourhoods this is worth as much as an extra room.
Sound separation. Doesn’t show in a listing photo, but it determines whether tenants renew — and turnover is expensive. This is a code requirement anyway; building it well is the difference between a tenant who stays three years and one who leaves after one.
Storage, and a sensible layout that doesn’t require walking through one room to reach another.
Ceiling height above the minimum. If you have it, it shows.
What matters less than owners expect: premium finishes. Rental markets price light, independence and layout well above countertop material.
Legal vs illegal, and what it’s worth
Legal suites rent for more, and the reasons compound.
They’re marketable as legal. In Calgary this is verifiable — the City maintains a public, searchable secondary suite registry, and registered suites carry a numbered sticker at the main entrance. Increasingly, tenants know to check.
They attract better tenants. A tenant who cares about a legal unit is generally a tenant who cares about the place they live.
They’re insurable properly. An undisclosed rental unit can compromise a claim — which is your exposure, not the tenant’s, and it doesn’t go away because the rent is being paid.
And the one with the clearest financial consequence: lenders will generally only count rental income from a legal unit toward qualifying you — commonly up to half of projected rent. If you’re refinancing to fund anything, an unpermitted suite may be actively reducing your borrowing capacity.
So the rent premium on a legal suite is real, but it’s the smallest part of the advantage. The rest is insurability, financing and resale. Our secondary suites overview covers what makes a suite legal.
City-by-city context
Rather than quote figures we can’t source, here’s what to expect structurally in each market:
Toronto and the GTA. Highest rents in the country alongside Vancouver, and correspondingly high build costs and development charges — though the 2nd and 3rd units are DC-exempt under Bill 23. Strong tenant demand for basement apartments; the term to use in listings is “basement apartment.”
Vancouver and Metro Vancouver. High rents, high build costs, and 7% PST on construction inputs. Vacancy rose notably through 2025–26. In Surrey, a registered suite attracts ongoing utility and service fees on your property taxes — net that off.
Calgary and Edmonton. Lower rents than the coastal markets, but a materially lower cost base — no provincial sales tax, no Ontario-style development charges, and published permit fees in the low hundreds. The payback arithmetic can be as good or better than higher-rent markets for exactly that reason.
The general point: don’t compare gross rent across cities. Compare net rent against build cost in your own market. A lower rent against a much lower cost can outperform.
What to net off
Gross rent is not income. Subtract, honestly:
- Vacancy. Even in a tight market, assume some. Check your centre’s current rate.
- Utilities you pay. Many basement suites aren’t separately metered, so you carry a share.
- Maintenance and repairs. A second kitchen and bathroom means more of both.
- Incremental insurance on a disclosed rental unit.
- Ongoing municipal fees, where they apply — Surrey’s suite fees are the clearest example.
- Property tax increase, since assessment follows market value.
- Tax on the rental income, which is real and routinely omitted.
What’s left is net rent. That’s the number that meets your carrying cost, and it’s typically well below the figure people quote when they say what their suite “brings in.”
Turning rent into a project decision
Three questions, in order:
1. Does net rent cover the increase in your carrying cost? Not the whole mortgage — the increase caused by financing the build. If yes, the suite pays for itself while you hold it.
2. Does it justify the build cost over your actual hold period? Construction is paid once and recovered over years. Under about five years, most suite projects don’t recover their soft costs.
3. Is the build cost in the right category? If your ceiling height requires underpinning, you may spend well beyond what any rent will justify. Measure first — 1.95 m in Alberta and Ontario, 2 m in BC.
If all three answer yes, you have a project. If the rent research says no, you’ve saved yourself a great deal — and that’s a good outcome, not a disappointing one. Our your options page covers the alternatives, and our results page covers what we work toward.
Turn your rent research into a real decision
Rent is the input. What it means depends on your build cost — and that comes down to ceiling height, egress and servicing on your specific property.
HouseLyft’s free property assessment establishes what your property supports and where the cost drivers sit, so the rent number you’ve researched can be turned into an answer. Request your free report.
This guide explains how to research rental income in general terms and is not financial advice. No figure here is a projection — use current market data for your own area, and confirm tax treatment with a qualified accountant.
Checked by Lee Yousaf, Founder