Dobey Realty

Basement Suites in Calgary

By Evans Dobey, REALTOR® | Updated October 2026 | Legal and illegal suites, the City’s registry, what to check before you buy, and how suite rent works with your mortgage

Calgary real estate market update

What to know about suites

A basement suite can help pay the mortgage, give family a place to live, or turn a home into a long-term rental. If it was never built to code, it can also hide expensive problems. Here’s the short version:

  • A legal suite has passed City of Calgary permits and inspections. It’s listed on the public Secondary Suite Registry and has a City sticker at the suite entrance.
  • Since August 4, 2026, a suite that meets the Land Use Bylaw rules needs only a building permit, not a development permit.
  • The City’s amnesty waives development permit and registry fees for suites legalized by December 31, 2026.
  • Right now, 634 of the 3,197 houses and duplexes for sale in Calgary mention a suite. Only 272 describe it as legal, and that’s the seller’s claim, not a City record.
  • Lenders can count up to 100% of a legal suite’s rent when you qualify for a mortgage. Rent from an unregistered suite is often counted at zero.

Below I cover what makes a suite legal, how to check one before you buy, what it takes to legalize one, and how suite income works with your mortgage and Alberta’s tenancy rules. Every rule links to its official source.

This is general information, not legal or building-code advice. Rules change, so confirm with the City of Calgary for your property.

What changed for Calgary suites in 2026

2026 brought several changes buyers and owners should know about:

  • Secondary suites are now a permitted use (August 4, 2026). Council voted on July 28 to make secondary suites a permitted use. If your suite meets the Land Use Bylaw rules for your district, it’s approved through a building permit alone, without a development permit or neighbour appeals. City administration estimated this saves up to six weeks and over $600 in fees per suite (as reported by Global News). A development permit can still be needed if your design doesn’t meet the bylaw rules, or if the property is in a flood-prone or airport-noise area, according to the City’s guidebook.
  • Backyard suites still need a development permit. Council kept backyard (garden or laneway) suites as a discretionary use, so neighbours can still appeal them.
  • Citywide rezoning was repealed as of August 4, 2026, so residential properties now fall under a range of land use districts again. My citywide rezoning guide explains what changed. See the City’s rezoning page and check your property’s district on myProperty.
  • The amnesty ends December 31, 2026. Until then, development permit charges and registry fees are waived for owners who legalize a suite.
  • Incentive programs closed. Applications for the Secondary Suite Incentive Program and Backyard Suite Incentive Program closed on September 28, 2026.

Official details: City of Calgary: Secondary suites and backyard suites and Secondary suite permit requirements.

How to check the Secondary Suite Registry

The Registry is the fastest way to confirm a suite is legal. It’s public and free.

  1. Go to the City’s Secondary Suite Registry map (secondarysuites.calgary.ca).
  2. Search the property’s address. If it appears on the map, the City considers the suite legal and safe. If it doesn’t, the suite isn’t registered.
  3. At the showing, look for the City’s registration sticker, usually at the suite’s main entrance.
  4. Ask the seller for the building permit number and final inspection. You can look up permit history on myProperty.
  5. If the suite isn’t registered, ask whether permits are open or in progress, and get that in writing.

The Registry has grown fast: the City reported more than 20,000 registered suites in August 2025, and 6,232 suites were registered in 2025 alone. A registered suite is still worth a good inspection, since things can change after the City signs off.

What a legal suite needs

These are the main life-safety requirements from the City’s Secondary Suites Guidebook (October 2025). They’re a good checklist to walk through at a showing, even if you’re not planning to rent the suite.

RequirementWhat the City looks for
Smoke and CO alarmsHardwired and interconnected. A smoke alarm going off in the suite must sound all suite alarms and at least one in the main home. CO alarms within 5 m of every bedroom.
Bedroom egress windowsAt least one per bedroom that opens fully without tools, with an opening of at least 0.35 m² (3.8 ft²) and no side under 380 mm (15 in). New window wells need 760 mm (30 in) of clearance.
Fire separationA continuous smoke-tight barrier between the suite and the main home, using at least 12.7 mm (½ in) drywall, with sealed gaps. Doors between units: solid-core, at least 45 mm thick, self-closing, with a deadbolt.
Heating and ventilationSeparate from the main home: its own furnace and ducts, or an HRV with a separate heat source like electric baseboards. A tenant-accessible thermostat. (A shared system may be allowed for suites built before March 12, 2018.)
Ceiling heightTypically at least 1.95 m (about 6 ft 5 in).
SoundAt least 150 mm (6 in) of sound insulation in the suite ceiling, resilient channels and ½ in drywall.
ExitAn entrance that doesn’t pass through the main home, with protection from nearby windows over exterior stairs.
Land use rulesOne suite per property, usually one extra parking stall, and 7.5 m² of outdoor amenity space. Basement suites have no maximum floor area.

Requirements depend on your land use district and when the suite was built, and the guidebook is not an official interpretation of the codes. Confirm with the City’s Planning Services Centre at 403-268-5311.

What to check before you buy a home with a suite

Here’s the checklist I go through with buyers looking at a home with a suite:

  1. Check the Registry and sticker. Registered or not changes the price, financing and insurance.
  2. Check the land use district. Look the address up on myProperty. Some districts need a development permit for a suite, and a few (like R-MH) don’t allow one at all without a redesignation.
  3. Ask for permits and paperwork. Building, electrical, plumbing and gas permits, the final inspection, and the current lease if it’s rented.
  4. Walk the safety items. Egress windows in every bedroom, interconnected alarms, a separate furnace or heat source, a solid self-closing door between units, and drywall on the ceiling.
  5. Book an inspector who knows suites. Ask them to flag anything that would block legalizing it. See my home inspection red flags guide.
  6. Check the Real Property Report. Make sure any separate entrance, stairwell or window well changes are shown and compliant.
  7. Talk to your lender early. Whether they count the rent, and how much, can change what you qualify for.
  8. Call your insurer. Get a quote that covers a rental suite before you remove conditions.
  9. Write the right conditions. If the suite matters to you, we can make the offer conditional on proof of permits or registration, or price in the cost of legalizing it.

Tenants come with the house. If the suite is rented, the existing lease and the tenant’s rights carry over under Alberta law, so review the lease and notice rules before you plan to move family in or renovate.

Homes with suites for sale right now

From my live MLS® listings: houses and duplexes for sale in each part of Calgary, how many mention a suite, and how many describe it as legal. “Described as legal” is what the listing says, not a City record, so always check the Registry.

AreaHouses & duplexes for saleMention a suiteShareDescribed as legal
City Centre Calgary49210221%58
North Calgary4829720%53
Northeast Calgary46320143%42
Northwest Calgary3675314%31
East Calgary1325642%16
West Calgary247187%8
South Calgary5995810%27
Southeast Calgary4154912%37
All of Calgary3,19763420%272

Browse them: all Calgary homes with a suite or homes listed with a legal suite. Suites are most common in Northeast Calgary, where about 43% of houses for sale mention one. See Northeast Calgary real estate.

Legalizing an existing suite

If you buy a home with an unregistered suite, or already own one, here’s the City’s process (from the Secondary Suites Guidebook):

  1. Confirm the district allows a suite and check for outstanding permits on myProperty.
  2. Apply for a development permit only if you need one: if the design doesn’t meet the bylaw rules, or the home is in a flood or airport-noise area. Development permit fees are waived under the amnesty until December 31, 2026.
  3. Apply for a building permit through a City myID account. The guidebook’s fee table lists $205.92 for an existing suite and $418.08 for a new one; check the City’s current fees before you apply.
  4. Submit an asbestos abatement form if the home was built before 1990.
  5. Get trade permits for electrical, plumbing, gas and mechanical work. Concealed electrical or plumbing in an existing suite needs a licensed contractor.
  6. Book inspections: a rough-in and a final. Inspectors may ask to open up drywall.
  7. Registration: after the final inspection the suite is added to the Registry automatically, and the sticker arrives in 2 to 3 weeks.

Suites built before March 12, 2018 with no structural changes since have their own process, with simpler documents (an owner declaration and photos instead of full drawings), and may be allowed some reduced code requirements, like a shared heating system. They still have to meet minimum life-safety requirements.

Construction costs vary a lot. Adding egress windows, a fire-rated ceiling, interconnected alarms and separate heat can run from a few thousand dollars to much more, depending on what’s already there. Get a contractor’s quote during your conditional period.

Rental income and your mortgage

What suites rent for. CMHC’s 2025 Rental Market Report put Calgary’s average purpose-built two-bedroom rent at $1,914 a month, with a 5.0% vacancy rate, and two-bedroom condo rentals at about $2,030. Basement suites usually rent for less than a comparable apartment, depending on size, light, parking and location, so get a realistic local estimate before you count on a number. Source: CMHC Rental Market Report.

How lenders count suite income. For an owner-occupied home with one legal suite, mortgage insurers like CMHC allow up to 100% of the suite’s gross rent to be counted when you qualify, though many lenders use 50% to 80% or add part of the rent to your income instead. Income from an unregistered suite is often counted at zero. Expect to show a signed lease, or an appraiser’s market rent estimate if the suite is empty. Down payment rules for a two-unit owner-occupied home are the same as for a single home.

An example. If a legal suite rents for $1,500 a month and your lender counts 50% of it, that’s $750 a month toward your carrying costs, which can raise what you qualify for by tens of thousands of dollars. Ask a mortgage broker to run your actual numbers.

Taxes. Suite rent is taxable income, reported on CRA form T776, and you can deduct a share of eligible expenses. A suite can also affect the principal residence exemption when you sell. Talk to an accountant. More: CRA guide T4036: Rental income.

Use my mortgage calculator to see payments before and after suite income.

Renting it out: Alberta landlord basics

Renting a suite makes you a landlord under Alberta’s Residential Tenancies Act. The basics (check the Government of Alberta landlords and tenants page for current rules):

  • Security deposit: no more than one month’s rent, and it can’t go up when the rent does. Interest may be owed on it each year.
  • Inspections: written move-in and move-out inspection reports are mandatory. Without them, you can’t deduct damage from the deposit.
  • Rent increases: only once every 365 days, with written notice (three full months for a month-to-month tenancy). There’s no cap on the amount.
  • Ending a tenancy: for month-to-month, a tenant gives one full month’s notice and a landlord gives three, with a reason allowed under the Act.
  • Lease: put it in writing and give the tenant a signed copy within 21 days.
  • Disputes: the Residential Tenancy Dispute Resolution Service (RTDRS) handles most landlord and tenant disputes outside court.

Public Legal Education Alberta’s landlord and tenant site has plain-language guides and sample forms.

The risks of an illegal suite

An unregistered suite isn’t automatically a deal-breaker. Lots of buyers legalize one or use the space as part of the main home. Just know what you’re taking on:

  • Safety. Without egress windows, fire separation and interconnected alarms, a basement fire can trap people. This is the main reason the rules exist.
  • Enforcement. If the City learns of an unregistered suite, the owner has to legalize it or remove it, according to the City.
  • Financing. Lenders may not count the rent, so you qualify for less.
  • Insurance. Insurers may limit coverage or decline a claim connected to an undisclosed rental. Always disclose it.
  • Tenant issues. Your tenant still has full rights under the Residential Tenancies Act, even if the suite isn’t legal.
  • Resale. The next buyer will ask the same questions, so an unregistered suite can limit your buyer pool and price.

If you’re weighing a home with an unregistered suite, I can help you estimate legalizing costs and build them into your offer.

Common questions

Have a question that isn’t here? Check the real estate glossary or ask me and I’ll get back to you, usually the same day.

Search the address on the City’s Secondary Suite Registry. If it’s on the map, and there’s a City sticker at the suite entrance, it’s legal. If it isn’t listed, it hasn’t been approved and registered.

Usually not anymore. Since August 4, 2026, a secondary suite that meets the Land Use Bylaw rules for your district needs only a building permit. You may still need a development permit if the design doesn’t meet the rules or the property is in a flood-prone or airport-noise area. Backyard suites still need one.

City fees are modest: the guidebook lists a building permit at $205.92 for an existing suite, and development permit and registry fees are waived until December 31, 2026. The real cost is construction (egress windows, fire separation, alarms, separate heat), which can range from a few thousand dollars to tens of thousands depending on the suite.

Yes, if the suite is legal. Insurers like CMHC allow up to 100% of a legal suite’s rent for an owner-occupied home, though many lenders use 50% to 80%. Rent from an unregistered suite is often not counted.

A secondary suite is inside or attached to the house, often in the basement. A backyard suite is a separate building, like a garden suite or a suite above a garage. Backyard suites still need a development permit and have a 75 m² size limit.

Yes, but price in the cost of legalizing it or using it as part of the main home, check that your lender and insurer are fine with it, and get a thorough inspection. I can help you weigh it and write conditions into your offer.

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Tell me what you’re looking for and I’ll email you new matches, usually the morning after they’re listed. You can unsubscribe at any time.

Looking at a home with a suite?

I can check the Registry and permit history on any home you’re considering, walk through the suite with you, and help you price in the cost of legalizing it before you write an offer.

Talk to Evans
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