Calgary Secondary Suite Requirements: The Full Checklist

Checked against City of Calgary pages, 23 July 2026. Calgary’s zoning is actively changing — verify your address.

Calgary has more legal secondary suites than most Canadian cities, and a more transparent system for confirming which ones are legal. The requirements are a finite list, the permit fees are published and low, and registration costs nothing.

That combination makes Calgary one of the more tractable markets in the country for a homeowner adding a suite — provided you work through the list in the right order.

The requirements, itemised

The City defines a secondary suite as “a self-contained residence with two or more rooms” including a kitchen, living, sleeping and sanitary facilities. Every suite must have:

• Bedrooms with proper egress windows
• A separate bathroom
• Separate cooking facilities
• An entrance accessible from outside without passing through the main dwelling unit — and importantly, a shared stairwell is acceptable, provided each unit has its own private entrance off it

Beyond that definition, the National Building Code – Alberta Edition sets the safety requirements:

Ceiling height. Minimum 1.95 m within the suite and above stairs, reducible to 1.85 m below ductwork and beams. This is the make-or-break measurement — raising it means underpinning, which is structural work with structural cost. Measure before anything else.

Egress windows. Every bedroom needs an openable window providing egress: minimum clear openable area of 0.35 m² with no dimension less than 380 mm. It must open from inside without keys, tools or special knowledge, and without removing sashes or hardware.

Fire separation. A smoke-tight separation between the main residence and the suite, and in common spaces and the furnace room. Doors in common spaces, the furnace room, or between dwellings must be solid core wood at least 45 mm thick with a self-closing device.

Smoke and carbon monoxide alarms. Hardwired and interconnected, so that one sounding sounds them all.

Protected exiting. Exit routes protected to the standard the code requires — one of the items Calgary’s incentive programme specifically reimburses.

Plumbing and electrical. Separate trade permits, generally requiring licensed trades. A second kitchen commonly triggers an electrical service review.

One Calgary-specific item: parts of the city sit within the Airport Vicinity Protection Area (AVPA), a noise-exposure overlay that can restrict new residential units. Check your address against it before designing — it’s not obvious from the street.

Zoning: is your lot eligible?

This is the part of Calgary’s system that is genuinely in flux, and it needs checking rather than assuming.

As of 23 July 2026, two separate things are happening at once:

1. Blanket rezoning is being repealed. City Council approved a repeal on 8 April 2026, with amendments. The repeal bylaw takes effect 4 August 2026, and many properties revert to their zoning as it stood before the 2024 city-wide rezoning. Two further bylaws — 27P2026 (adding parcels to the exemption list) and 28P2026 (removing parcels) — went to a Public Hearing of Council on 21 July 2026, and the outcome was not yet published at the time of writing.

2. Suites are moving in the opposite direction. Separately, Bylaw 26P2026 proposes listing secondary suites and backyard suites as permitted uses in low-density residential districts, proposed to take effect 5 August 2026. The City states that rule changes for secondary suites and backyard suites will apply to all low-density residential properties.

Why the distinction matters practically. In Alberta, a permitted use must be approved if it complies with the rules — there is no discretion to refuse, and no third-party appeal. A discretionary use gets deeper review, can attract conditions, can be refused with reasons, and can be appealed by neighbours. Moving suites from discretionary to permitted removes the single biggest source of uncertainty for a homeowner.

So the honest summary: Calgary is becoming less permissive on multi-unit built form and more permissive on suites. Do not rely on older content saying “suites are permitted everywhere in Calgary” — and equally, don’t assume the repeal blocks your suite.

What to do: use the City’s interactive address map to check your property’s current and post-4-August zoning, and confirm with the Planning Services Centre. Our Calgary building guide tracks the position.

Parking

A genuine Calgary sticking point, and one that catches out homeowners with narrow lots.

Under the Land Use Bylaw, a secondary suite requires a minimum of one motor vehicle parking stall. The requirement is reduced in some land use districts where certain conditions are met — proximity to transit, or where the main dwelling already has two or more stalls.

Two exclusions that matter:

• Street parking does not count toward the requirement
• Tandem stalls located directly behind or in front of other required stalls do not count

That second one surprises people. A driveway that fits two cars nose-to-tail is often one qualifying stall, not two. If parking is tight on your lot, resolve this before you design — it can determine whether the suite is possible at all, and it’s a zoning question rather than a code one.

The permit and registration process

In order, and the order matters:

1. Check your zoning using the City’s address map, and confirm eligibility.
2. Apply for the building permit through the City’s online system. A development permit is required in some circumstances — the City’s guidance distinguishes new suites from existing suite legalisations.
3. If you want the incentive, apply to it after getting your permit number and before starting work. See below.
4. Apply for trade permits — electrical and plumbing.
5. Build, then pass inspections.
6. Register the suite on the City’s registry.

On the registry. Calgary maintains an online, searchable secondary suite registry listing legal and safe suites that have been registered and inspected to meet Alberta safety code requirements. Registered suites are listed on the City’s website and receive a numbered sticker to post at the main entrance, which owners can use to demonstrate the suite’s status to current and prospective tenants.

Registration carries no fee — the City lists the suite registry at $0. Given that a registered suite is insurable, financeable and demonstrably legal to a buyer, a free registration is among the better-value steps in the whole process.

Published permit fees, from the City’s secondary suite permit costs page:

The City gives an approval timeline of approximately 7 days for reviewing an existing-suite legalisation, noting that timelines depend on volume and application completeness.

Cost to bring an existing suite up to code

We don’t publish a figure, because the range is genuinely enormous — and that’s the useful information.

Legalising an existing Calgary suite can mean:

• A weekend of work. Interconnected smoke and CO alarms, a solid-core self-closing door on the furnace room. A few hundred dollars plus the $205.92 permit.
• A moderate project. Enlarging an egress window — cutting concrete and excavating a window well — plus fire separation work.
• A structural project. Underpinning to gain ceiling height if you’re short of 1.95 m. This changes the budget category entirely and occasionally makes legalisation uneconomic.

The order to check them: ceiling height first (it’s the one you can’t cheaply fix), then egress, then separation and alarms. That sequence tells you within an hour which category you’re in.

The Secondary Suite Incentive

Calgary runs the only municipal suite incentive of substance in Alberta — with conditions.

What it pays: up to $10,000 for qualifying safety elements, plus up to $7,500 for accessible spaces serving common mobility issues, plus up to $1,900 for ENERGY STAR certified egress window and split heat/separate air equipment.

The qualifying safety elements and their caps: egress windows $1,500; hardwired interconnected smoke and CO alarms $1,000; protected exiting $1,000; smoke-tight barrier $4,000; split heat/separate air $6,000 — with maximum eligibility for safety items of $10,000 per home.

The conditions that disqualify people:

• Waitlisted. As of 24 June 2026, new applications go onto a waitlist and funding may not be available.
• Main dwelling only. Backyard and detached suites are excluded entirely.
• Permit first, then apply, then build. Work done before your application date does not qualify.
• One application per person, and you must own the property throughout.
• No short-term rental licence for two years, under requirements updated 3 June 2025.

Note that the accessibility and ENERGY STAR top-ups are design decisions — they have to be built into the drawings, not added later. That’s the argument for deciding early whether you’re targeting them.

Details on the City’s incentive page.

Find out where your Calgary property stands

With Calgary’s zoning changing on 4 and 5 August 2026, the most useful thing you can establish is what your specific address permits — and whether your basement can meet the height and egress requirements without structural work.

HouseLyft’s free property assessment covers both. Our secondary suites overview covers the category, and our planning and permits page covers the approvals stage. Request your free report.