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How Many Toilets Do You Need?

The first consideration when designing washrooms is the number of people who will use the facility. This handy guide will help you work out how many toilets, urinals, washbasins and showers to include in buildings.

The following recommendations are sourced from British Standard 6465-1:2006+A1:2009 – Sanitary Installations.


Office washrooms

Minimum scale of provision of sanitary appliances for staff toilets in offices, shops, factories and other non-domestic premises used as a place of work.

Female toilets

Number of persons at workNumber of toiletsNumber of washbasins
1 to 1511
6 to 1522
16 to 3033
31 to 4544
46 to 6055
61 to 7566
76 to 9077
91 to 10088

Above 100 persons require 8; plus 1 toilet and washbasin for every unit or fraction of a unit of 25 persons.

Male toilets

Number of persons at workNumber of toiletsNumber of urinalsNumber of washbasins
1 to 15111
16 to 30212
31 to 45222
46 to 60323
61 to 75333
76 to 90434
91 to 100444

Every male toilet should have at least one WC. Considerations should be given to the provision of privacy screens between urinals.

Above 100 persons require 4; plus 1 toilet, urinal and washbasin for every unit or fraction of a unit of 50 persons.


Shops and shopping centres

Minimum provision of sanitary appliances for customer toilets in shops and shopping centres with a retail area in excess of 1,000 m2.

Sanitary applianceMale customersFemale customers
Toilet1 per 500 males; plus 1 per every additional 1,000 males or part thereof
Where urinals are not used, toilet numbers to be half of those used for females
1 per 100 females up to 500; plus 1 per every additional 200 females or part thereof
Urinal2 for up to 500 males; plus 1 for every additional 500 males or part thereofN/A
Washbasin1 per toilet; plus 1 per 5 urinals or part thereof1; plus 1 per 2 toilets or part thereof


School toilets

Minimum provision of sanitary appliances for school washrooms.

Nursery (age 3 – 5 years)

Sanitary applianceNumber of sanitary appliances
Toilet1 per 10 pupils or part thereof; not less than 4
Washbasin1 per toilet
Deep sink, bath or shower1 per 40 pupils

Primary (age 4 – 11 years)

Sanitary applianceNumber of sanitary appliancesNotes
Toilet and urinal1 per 10 pupils under 5-years; and 1 per 15 pupils over 5-years, or part thereofNot more than ⅔ of boys' appliances to be urinals
Washbasin1 per toilet / urinalEvery toilet / urinal to be close to a washbasin
Shower (where provided)1 per 10 males or part thereof, and 1 per 10 females or part thereof

Secondary (age 11+ years)

Sanitary applianceNumber of sanitary appliancesNotes
Boys' toilet and urinal1 per 20 pupils, or part thereofNot more than ⅔ of appliances to be urinals
Girls' toilet1 per 20 pupils
Washbasin1 per toilet / urinal where there are up to 3 appliances; 2 per 3 toilets / urinals where there are more than 3 appliancesEvery toilet / urinal to be close to a washbasin
Shower (where Physical Education provided)1 per 10 males or part thereof, and 1 per 10 females or part thereofEasily accessible from all places where Physical Education takes place

Separate staff facilities should be provided in accordance with Office washrooms (above), except that facilities for disabled staff may be shared with pupils.

Where pupils are 8-years old or over, changing rooms and sanitary facilities for Physical Education staff should be in addition to and separate from sanitary facilities for pupils.


Sports and entertainment venues

Minimum provision of sanitary appliances for assembly buildings where most toilet use is during intervals. For example theatres, cinemas, concert halls, sports stadiums and similar buildings.

Sanitary applianceMale visitorsFemale visitors
Toilet2 for up to 250 males; plus 1 for every additional 250 males or part thereof2 for up to 20 females; plus 1 for every additional 20 females or part thereof up to 500 females; and 1 per 25 females or part thereof over 500 females
Urinal2 for up to 50 males; plus 1 for every additional 50 males or part thereofN/A
Washbasin1 per toilet and in addition, 1 per 5 urinals or part thereof1; plus 1 per 2 toilets or part thereof

Minimum provision of sanitary appliances for assembly buildings where toilet use is NOT concentrated during intervals. For example exhibition centres, libraries, museums and similar buildings.

Sanitary applianceMale visitorsFemale visitors
Toilet1 per 250 males; plus 1 for every additional 500 males or part thereof
Male toilet provision should be half female toilet provision where urinals are not used
2 for up to 40 females;
3 for up to 70 females;
4 for up to 100 females; plus 1 for every additional 50 females or part thereof
Urinal1 per 50 males up to 100 males; plus 1 for every additional 100 males or part thereofN/A
Washbasin1 per toilet and in addition, 1 per 5 urinals or part thereof1; plus 1 per 2 toilets or part thereof

Restaurants and food courts

Minimum provision of sanitary appliances for restaurants and other places where seating is provided for eating and drinking.

Sanitary applianceMale customersFemale customers
Toilet2 for up to 150 males; plus 1 for every additional 250 males or part thereof
2 for up to 50 males if urinals are not provided
2 for up to 30 females; plus 1 for every additional 30 females up to 120, plus 1 for every additional 60 females or part thereof
Urinal1 per 60 males or part thereof up to 120 males; plus 1 for every additional 100 males or part thereofN/A
Washbasin1 per toilet; plus 1 per 5 urinals or part thereof1 per toilet


Pubs, bars and nightclubs

Minimum provision of sanitary appliances for licenced pubs, bars and nightclubs.

Sanitary applianceMale customersFemale customers
Toilet2 for up to 150 males; plus 1 for every additional 200 males or part thereof
2 for up to 40 males if urinals are not provided
2 for up to 25 females; plus 1 for every additional 25 females or part thereof up to 200 females; plus 1 for every additional 35 females or part thereof
Urinal1 for every 50 males up to 200 males; plus 1 for every additional 70 males or part thereofN/A
Washbasin1 per toilet; plus 1 per 5 urinals or part thereof1; plus 1 per 2 toilets or part thereof


Swimming pools

Minimum provision of sanitary appliances for swimming pools.

Sanitary applianceMale pool usersFemale pool users
Toilet2 for up to 100 males; plus 1 for every additional 100 males or part thereof1 per 5 females up to 50 females; plus 1 for every additional 10 females or part thereof up to 100 females; plus 1 per 50 females or part thereof thereafter
Urinal1 per 20 males up to 100; and 1 per 80 males or part thereofN/A
Washbasin1 per toilet; plus 1 per 5 urinals or part thereof1; plus 1 per 2 toilets or part thereof
Shower1 per 10 males or part thereof1 per 10 females or part thereof

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