Sizes & Dimensions Guide
Standard Toilet Cubicle Sizes (UK): Dimensions Guide
There is no single legal "standard" size for an ordinary toilet cubicle in the UK — dimensions are set by the room layout, traffic and cubicle range. Accessible cubicles, however, do follow published guidance: Approved Document M and BS 8300 give clear minimum sizes for ambulant and wheelchair-accessible WCs. This guide sets out the sizes commonly specified for commercial washrooms, alongside the accessible dimensions you must plan around.
At a glance
| Standard cubicles: commonly ~800mm+ wide, ~1400–1500mm deep. |
| Ambulant accessible: 1500mm x 900mm (outward-opening door). |
| Wheelchair-accessible unisex: 2200mm x 1500mm. |
| Height: ~2000mm panels on ~150mm legs, or full floor-to-ceiling. |
Toilet cubicle sizes at a glance
Typical UK dimensions by cubicle type. Standard cubicle sizes are guidance, not a legal minimum; accessible sizes follow Approved Document M and BS 8300.
| Cubicle type | Typical width | Typical depth | Notes |
|---|---|---|---|
| Standard toilet cubicle | ~800mm+ internal | ~1400–1500mm | Configured to the room; no single legal minimum |
| Ambulant accessible WC | 900mm | 1500mm | Outward-opening door, grab rails (Doc M / BS 8300) |
| Wheelchair-accessible unisex | 1500mm | 2200mm | Self-contained Doc M compartment with basin |
| Children / nursery | Reduced | Reduced | Lower heights and widths by age group |
Standard toilet cubicle dimensions
For ordinary commercial and school WCs there is no fixed legal size, so cubicles are planned around the room and the number of compartments needed. In practice, internal widths of around 800mm or more and depths of about 1400–1500mm are commonly specified, with door leaves typically 600–800mm wide. Total Cubicles configures each bay of toilet cubicles to the site dimensions rather than to a one-size-fits-all module.
Comfort and accessibility both improve with a little extra width, so where space allows it is worth specifying generously — particularly in schools, healthcare and high-traffic public washrooms.
Accessible cubicle sizes (Approved Document M & BS 8300)
Accessible WCs are where dimensions become prescriptive. A wheelchair-accessible unisex toilet is generally planned as a self-contained compartment of 2200mm x 1500mm, with the basin and fittings inside. An ambulant accessible cubicle is typically 1500mm deep x 900mm wide with an outward-opening door and grab rails.
Plan around the accessible sizes first. Fit the required wheelchair-accessible and ambulant compartments into the layout before spacing the standard cubicles — retrofitting accessibility into a tight plan is the most common washroom design headache. See our Approved Document M guide for the full requirements.
Cubicle heights and floor gaps
Standard commercial cubicles use panels around 2000mm high mounted on adjustable legs that leave a ~150mm floor gap for cleaning and airflow — giving an overall height a little over 2m. Where privacy is the priority, full floor-to-ceiling cubicles run the panels and door from floor level up to the ceiling with no gaps, and are increasingly specified for schools, changing areas and premium washrooms.
The right material also matters at these sizes: dry areas suit MFC, while wet and high-traffic washrooms are better in SGL / compact laminate. See our SGL vs HPL vs MFC guide to choose.
Sizes by sector
The right cubicle size depends on who uses the washroom.
Offices
Standard sizing plus the required accessible compartments.
Schools
Age-appropriate widths and lower heights — see the school requirements guide.
Leisure & changing
Fuller widths and floor-to-ceiling privacy in SGL cubicles.
Public & transport
Generous accessible provision and durable, easy-clean sizing.
Frequently Asked Questions
What is the standard size of a toilet cubicle in the UK?
There is no single legal minimum for an ordinary cubicle. Internal widths of around 800mm or more and depths of about 1400–1500mm are commonly specified, then configured to the room and the number of cubicles needed.
What size is an accessible (Document M) toilet?
A wheelchair-accessible unisex toilet is generally planned as a 2200mm x 1500mm self-contained compartment. An ambulant accessible cubicle is typically 1500mm deep x 900mm wide with an outward-opening door and grab rails, following Approved Document M and BS 8300.
How tall are toilet cubicles?
Standard commercial cubicles use panels around 2000mm high on ~150mm legs, giving a little over 2m overall. Full floor-to-ceiling cubicles are available where maximum privacy is required.
What is an ambulant cubicle?
An ambulant accessible cubicle is a larger standard-style compartment (about 1500mm x 900mm) with an outward-opening door and grab rails, for users who can walk but need extra support and space.
Are school toilet cubicle sizes different?
Yes. School cubicles use age-appropriate widths and lower heights for younger children. See our school toilet requirements guide for planning numbers and layout.
Related Guides
Planning a washroom layout?
Send us your drawings or dimensions and we will help size the cubicles, fit in the accessible compartments and confirm a schedule.