A secondary suite is one of the few things you can add to a Calgary property that changes both what it earns and what it is worth. It is also one of the few where getting the paperwork wrong follows you to closing. An unregistered suite is not a small administrative gap. It affects what a buyer's lender will accept, what an insurer will cover, and whether the rent can be counted as income at all.

This covers what the City of Calgary actually requires, what it costs today, and how long it takes. Every figure is from the City or from Alberta Municipal Affairs, with sources listed at the end. Two of them are time limited, and we have flagged which.

Which permits you need

The City puts it plainly: every suite needs a building permit. Most will also need an electrical permit, and some will need plumbing and HVAC permits.

The one that catches people out is the development permit, because whether you need it depends on your specific parcel rather than on the project. The City's rule is that if secondary suites are listed as discretionary in your district, or your design or location does not meet land use bylaw specifications, you also need planning approval. If your district lists suites as a permitted use and your design follows the rules, you can go straight to a building permit.

There is a third case worth knowing before you spend anything on drawings. In some land use districts, secondary suites and backyard suites are not listed uses at all. Putting a suite there requires a land use redesignation first, which is a longer and less certain process than a development permit.

You can check which case applies to your address using the City's property information tool, or by calling the Planning Services Centre at 403-268-5311. The complete rules sit in section 352 of Land Use Bylaw 1P2007.

Rules that apply regardless of district

There can only be one secondary suite within each dwelling unit.
A backyard suite and a secondary suite cannot be located on the same property.
Suites require a minimum of one motor vehicle parking stall. This is reduced in some districts where conditions are met, such as proximity to transit, or where the main dwelling already has two or more stalls.
Required floor area may be relaxed by up to 10 per cent through a development permit application.

Following the change of the base land use district from R-C1 to R-CG, the City notes that properties without a rowhouse or townhouse may now have both a backyard suite and a secondary suite.

What it costs

These are City permit fees only. They do not include construction, drawings, or a contractor. The Safety Codes Council fee of 4 per cent is added to building and trade permits and is shown separately below.

City of Calgary permit fees, as at August 2026
Permit	Fee	Safety Codes Council (4%)	Total
Legalize an existing secondary suite	$198	$7.92	$205.92
Build a new secondary suite	$388	$15.52	$403.52
New backyard suite	$1,252	$50.08	$1,302.08
Homeowner electrical permit	$112	$4.50	$116.50
Homeowner plumbing permit	$112	$4.50	$116.50
Suite registry	$0	$0	$0

Development permit fees for suites are currently $0, including the advertising fee and the development completion inspection. That is not the standing rate. Fees are waived under the Secondary Suites Amnesty Program, which runs to December 31, 2026. If you are weighing whether to legalize an existing suite, that deadline is the single strongest argument for doing it sooner rather than later.

Contractor trade permit fees vary by project and need a fee estimate from the City.

How long it takes

A building permit to legalize an existing suite is reviewed in approximately seven days, covering compliance with both the land use bylaw and the safety codes.

A development permit is considerably slower: 60 days to a decision, then a 21 day advertisement and appeal period. The City's own estimate for the full planning approval is 10 to 12 weeks. The City also notes these timelines are not a guarantee and depend on volumes, application completeness, and how quickly you respond to requests for more information. That last point is within your control and is usually where avoidable delay comes from.

Permits do not last indefinitely:

Building permit: 180 days from issuance
Contractor trade permit: 330 days
Homeowner permit: 330 days
Development permit: governed by the commencement date in your permit conditions, which is the date you must start construction by

The safety requirements your suite has to meet

These come from the National Building Code, Alberta Edition, which has applied to secondary suites since December 31, 2006. They are the requirements that most often turn a straightforward basement conversion into a real project, so it is worth reading them before you budget.

Ceiling height. Minimum 1.95 m (78 inches) for living spaces. For an existing suite, a lower ceiling may be acceptable subject to evaluation by a safety codes officer, which is a meaningful allowance in older homes.
Smoke-tight separation. Walls, ceilings and exits separated using 12.7 mm (half inch) drywall, so occupants of either unit have time to get out before fire spreads.
A direct exit to the outdoors. Stairs from a basement suite to a main floor vestibule with a door to outside are acceptable, provided those walls and ceilings carry the same 12.7 mm gypsum board protection.
Egress windows. Every bedroom needs at least one window with an unobstructed opening of at least 0.35 square metres (543 square inches), with no dimension less than 380 mm (15 inches). Where the window opens into a window well, at least 760 mm (30 inches) of clearance is required. It has to open from the inside without tools and stay open without being propped.
Interconnected alarms. Smoke alarms in each bedroom and hallway across both dwellings, wired so that any one alarm sets off all of them. Carbon monoxide alarms inside each bedroom or within 5 m of each bedroom door, measured along corridors and doorways, and interconnected the same way.
Enclosed mechanical equipment. Gas-fired furnaces and water heaters enclosed in a room with 12.7 mm drywall on both sides of the walls and on the ceiling.
Independent heating and ventilation. New suites need their own. The Government of Alberta describes this as either two furnaces or a combination of permanent alternate heating sources and independent ventilation. For pre-existing suites, a single shared system may be acceptable under the Alberta Fire Code.
Doors in smoke-tight barriers. Solid core wood, at least 45 mm (1 3/4 inches) thick, with a self-closing device.

On alarms specifically, the City adds a wiring detail that gets missed: they must be permanently wired to a circuit carrying lighting or a mix of lighting and receptacles, and where that circuit is protected by an arc fault or ground fault interrupter, the alarm needs an integral 10-year battery as a backup supply. Installing additional hardwired alarms requires an electrical permit.

One more Calgary-specific requirement for anyone considering a backyard suite: foundation footings must have at least 1.2 m of ground cover.

Backyard suite setbacks

Backyard suites are only allowed on properties with the dwelling types set out for each district, and there must not be more than one suite on a property. Where they are allowed, the setbacks are a minimum of 1.5 m from the rear property line, 1.2 m from the side property line, and 5.0 m of separation between the main residential building and the backyard suite.

The registry, and why it matters at resale

The Secondary Suite Registry is a searchable public list of legal, inspected suites in Calgary, at secondarysuites.calgary.ca. Registration has been mandatory for suite owners since June 1, 2018 under Bylaw 11M2018, with Council mandating registration by June 1, 2020. There is currently no cost, as fees are waived under the amnesty program until December 31, 2026.

For anyone buying or selling, the important detail is this: the registry is connected to the address, not to the owner. It transfers with the property. A registered suite is a verifiable fact a buyer can check for themselves before writing an offer, which removes an argument that otherwise turns up during conditions.

It works the other way too. If you are buying a home advertised as having a suite and it does not appear on the registry, that is not a technicality to sort out later. It is a question to ask before removing conditions, because the cost of bringing a non-conforming suite up to code lands on whoever owns it next. If a registered suite is later found non-compliant following a complaint, the City removes it from the registry.

The incentive program, and its current status

The City's Secondary Suite Incentive Program offers qualifying homeowners up to $10,000 to build and register a secondary suite, with up to an additional $1,900 for an ENERGY STAR certified egress window and split heat or separate air equipment, and up to $7,500 for accessible spaces for those with common mobility issues.

As of June 24, 2026, new applications are placed on a waitlist. The City states funding may not be available for homeowners applying after that date, and that files are added from the waitlist on a first-come, first-served basis if funds free up. Any guide telling you this money is simply available is out of date.

If you do apply, the sequencing matters more than anything else about the program:

You need an active building permit number before you can apply.
Only work done after you apply qualifies. Work completed beforehand does not, no matter how necessary it was.
The program covers suites within the main dwelling. Backyard and detached suites are not included.
One application per person, and you must own the property throughout the process.
A funded suite cannot be licensed as a short-term rental for two years, unless the funds are returned in full.
A mandatory eLearning course is part of qualifying.

Approved applicants should receive acceptance within five to seven business days of submission.

A realistic order of operations

Check your land use district for your specific address, and confirm whether suites are permitted, discretionary, or not a listed use.
If you are pursuing the incentive program, apply for the building permit, then apply to the incentive program, and only then start work.
Apply for the development permit first where one is required, since it is the 10 to 12 week step.
Pull the trade permits you need: electrical almost always, plumbing and mechanical depending on scope.
Build, and book a separate inspection for every permit you hold.
Register the suite, which is free until the end of 2026 and is what makes the suite verifiable to a future buyer.

Where these rules do not apply

Everything above is Calgary. Airdrie, Chestermere, Okotoks and Cochrane each administer their own land use bylaws, and their rules on where suites are allowed, what they cost, and how long approval takes are not the same. The provincial safety requirements in the National Building Code, Alberta Edition apply across Alberta, but the permitting and zoning side does not carry over. Check with the municipality directly before assuming a Calgary answer holds elsewhere.

Fees, timelines and program availability change. The figures here were verified against City and provincial sources on August 8, 2026, and the sources are listed below so you can check them yourself. For anything decision-critical, confirm with the Planning Services Centre at 403-268-5311.

Secondary suite permits in Calgary: what you need, what it costs, how long it takes