Basement development is one of the most common permit questions in Calgary. Everything below comes from the City of Calgary's own pages; check them before you start, because rules and fees change.
When a building permit is required
According to the City of Calgary, a basement development or other interior renovation requires a building permit if:
- the basement is being developed for the first time;
- you are making structural changes, such as moving or removing walls on any floor;
- you are creating new openings in interior or exterior walls (new or relocated windows, new doors);
- a new basement entry is being added.
Typically, interior renovations and changes to existing basements do not need a permit when the work is minor cosmetic upgrades, like finishes, paint and furniture.
Trade permits are separate
Plumbing and electrical work need their own permits. The City says a separate plumbing permit is required for all new plumbing installations and when extending or altering existing plumbing. Homeowners can pull their own plumbing, electrical and gas fireplace permits only if they legally own the home, live in it (not a rental), and do the work themselves. If you hire someone, they apply for the permit.
Development permits
Most basement developments only need building safety approval (a building permit). If your design or location doesn't meet the Land Use Bylaw, you also need planning approval, a development permit. The City lists the development permit review timeline as approximately 7 days.
Fees
The City's basements page lists (as of November 2026):
| Permit | Total |
|---|---|
| Building permit: new basement | $333.84 ($321 + 4% Safety Codes Council fee) |
| Building permit: renovation to existing house or developed basement | $205.92 ($198 + 4%) |
Trade permits are priced separately.
Wet bars, kitchens and suites
The City allows a wet bar in a basement development, but it cannot have a means of cooking (oven, stove, cooktop or microwave). If you intend to have a kitchen and a bathroom in the basement, you must apply for a secondary suite, which has its own requirements. If you already have an older suite, read about the amnesty that ends December 31, 2026.
What the inspector looks for
A City regulation bulletin notes items that need inspection when finishing a basement in a single-family home, including that the furnace be enclosed and separated from other spaces and that bedroom windows be large enough. Bedrooms need egress windows, and smoke and CO alarms are required. Plan these before framing, not after drywall.
What happens if you skip the permit
Unpermitted work can cause problems when you sell, refinance or make an insurance claim. The City has a concealed-work procedure for plumbing finished without permits: a licensed contractor has to obtain the permit, and the inspector may ask for drywall to be removed. Doing it right the first time is cheaper.
Frequently asked questions
How much is a basement permit in Calgary?
The City lists $333.84 total for a building permit for a new basement and $205.92 for renovations to an existing developed basement, as of November 2026. Plumbing and electrical permits are extra.
Do I need a permit to replace flooring in my finished basement?
No. The City says minor cosmetic upgrades such as finishes, painting and furniture typically do not require a permit.
Can I get a permit after the basement is finished?
Yes, but it is harder. Concealed plumbing must go through the City's concealed plumbing procedure with a licensed contractor, and inspectors may require drywall removal.
Sources
- City of Calgary: Home renovations and basements
- City of Calgary: Homeowner electrical and plumbing permits
- City of Calgary Regulation Bulletin RB14-025 (PDF)
Rules, programs and prices change. Always confirm details with the source before you plan or budget.
