What are the Alberta Building Code requirements for an accessible bathroom?

The Alberta Building Code (ABC) sets specific requirements for accessible bathrooms in public and multi-unit residential buildings, while single-family homes follow these standards as best-practice guidelines for aging-in-place design. If you're building a new home, the ABC does not mandate full accessibility in private single-family bathrooms, but following these dimensions ensures your bathroom will be functional for anyone with mobility challenges — and future-proofs your home for aging in place.

For doorways, the Alberta Building Code requires a minimum clear opening of 810 mm (approximately 32 inches) for accessible bathrooms, though 915 mm (36 inches) is strongly recommended for comfortable wheelchair passage. The door must swing outward or be a sliding/pocket door so that a person who falls inside the bathroom does not block the door from opening. Lever-style door handles are required instead of round knobs, as they can be operated with a closed fist or forearm. If you're widening an existing bathroom doorway in a Calgary home, expect to pay $1,500 to $3,500 depending on whether the wall is load-bearing — a structural header is required for load-bearing walls, and a building permit from the City of Calgary is mandatory for this work.

The clear floor space requirement is critical. An accessible bathroom must provide a minimum turning radius of 1,500 mm (approximately 60 inches) to allow a wheelchair to make a complete turn. This is the single biggest challenge in retrofitting older Calgary homes, where bathrooms are often compact. In many cases, achieving the turning radius requires expanding the bathroom footprint into adjacent space — a closet, hallway, or bedroom. This structural modification requires both a building permit and typically a plumbing permit if fixtures are relocated.

Toilet placement in an accessible bathroom requires a minimum of 460 mm (18 inches) from the centre of the toilet to the nearest side wall, with a clear floor space of at least 900 mm by 1,500 mm beside the toilet for wheelchair transfer. The toilet seat height should be between 430 mm and 460 mm (17 to 18 inches) — this is the standard comfort-height toilet dimension that most manufacturers now offer. Grab bars must be installed on the side wall and behind the toilet, mounted at 840 to 920 mm (33 to 36 inches) above the floor, and anchored into solid wood blocking capable of supporting a minimum 1.3 kN (approximately 290 pounds) of force.

Shower requirements for accessibility specify a roll-in (curbless) shower with a minimum interior dimension of 900 mm by 1,500 mm (36 by 60 inches). The shower floor must be slip-resistant and slope to the drain at 1:50 (approximately 1/4 inch per foot). A folding or removable seat, grab bars on two walls, a hand-held shower head on an adjustable slide bar, and accessible controls mounted at 900 mm to 1,200 mm (36 to 48 inches) above the floor are specified. The controls must be operable with one hand and not require tight grasping or twisting — lever or paddle-style handles meet this requirement.

Sink and vanity requirements call for a maximum rim height of 865 mm (34 inches) with knee clearance underneath of at least 685 mm (27 inches) high, 760 mm (30 inches) wide, and 430 mm (17 inches) deep. A wall-mounted sink or an open vanity without cabinet doors below meets this requirement. The faucet must be lever-operated, and insulation on exposed drain pipes prevents contact burns for wheelchair users.

All plumbing and structural modifications for an accessible bathroom renovation require permits from the City of Calgary. A Safety Codes Officer will inspect the completed work to verify code compliance. Make sure your contractor has experience with accessibility standards, carries WCB Alberta coverage, and pulls all required permits. Browse bathroom renovation contractors through the Calgary Construction Network directory to find professionals experienced in accessible design.

---

Looking for experienced contractors? The Calgary Construction Network connects homeowners with qualified professionals:

• Dealtwith.
• Calgary Garage Builders Ltd
• Mayken Hazmat Solutions LTD
• Alpine Exteriors siding and roofing
• Premium Built Structures