Accessible Bathrooms and WC Provision

What This Requirement Covers

Approved Document M sets out requirements for bathroom and WC facilities to ensure they are accessible to people with disabilities. The requirements differ between dwellings (M4(1), M4(2), M4(3)) and non-domestic buildings (Volume 2).

Key Requirements

Dwellings - M4(1) Baseline

1. A WC must be provided on the entrance storey (or principal storey if the entrance is above ground)
2. The WC compartment must be large enough for a wheelchair user to enter and close the door (minimum 1200 mm x 800 mm, with the door opening outwards or sliding)

Dwellings - M4(2) Accessible and Adaptable

1. At least one bathroom and one WC must be on the same level as the principal bedroom
2. Walls adjacent to the WC, bath, and shower must be reinforced (with noggins or plywood) to support future grab rail installation
3. The bathroom must have a clear wheelchair turning space (1500 mm diameter or 1700 mm x 1400 mm T-turn)
4. The WC must have at least 450 mm clear space to one side for potential side transfer from a wheelchair
5. The bath or shower must be accessible; a level-access shower is preferred

Dwellings - M4(3) Wheelchair User

1. A level-access shower (no step or threshold) is required in at least one bathroom
2. The WC must have full side transfer space (1000 mm clear to one side)
3. Grab rails must be installed (not just provision for future installation)
4. A shower seat must be provided
5. All sanitary fittings must be at accessible heights

Non-Domestic Buildings

1. At least one wheelchair-accessible unisex toilet per floor accessible to the public
2. Minimum dimensions: 2200 mm x 1500 mm (corner layout) with the door opening outwards
3. The WC must include horizontal grab rails, a vertical grab rail, and an emergency alarm cord
4. In larger buildings, Changing Places toilets (with hoist and changing bench) may be required

Practical Compliance Tips

1. Reinforce bathroom walls for grab rails during construction; it costs almost nothing at the time but is expensive to retrofit
2. Specify level-access showers with linear drains in M4(2) and M4(3) dwellings from the outset
3. Ensure bathroom doors open outwards or slide, so a person who has fallen inside can still be reached
4. Check that the WC seat height is between 430 mm and 480 mm (standard pan height with a slightly higher seat is often needed)
5. In non-domestic buildings, ensure the accessible toilet is on an accessible route and is clearly signposted
6. Include an alarm pull cord in all accessible toilets, capable of being reached from the floor
7. Consider contrasting colours for sanitaryware against walls and floors to aid visually impaired users