Considerations for Public Washrooms and Toilets

disabled parking sign

Designing public washrooms can be a much more complex process than you may have initially believed – there are certain criteria and guidelines your public facility must meet. Spectrum Interiors have years of experience in building comfortable and aesthetically pleasing public facilities. 

To kick off your public toilet project and to expand your public toilet ideas, using our comprehensive experience we’ve put together this guide to help you in designing the perfect facility for your establishment.

Basic Requirements

Before creating your public toilet plan with dimensions, it is important to cover the basics in the design of public toilets, first for your public washroom layout and there are some specifications that must be met to ensure that the facilities are safe, hygienic, and suitable for the public to use. Public restrooms design:

  • Facilities for disabled persons must be allocated
  • There must be suitable means for the disposal of sanitary products in the female facilities
  • Bathroom facilities must not open into any room where food is handled
  • Suitable wash facilities must be provided

Guidelines for the Number of Facilities

There are varying standards for facilities, dependant upon the type of establishment they are to serve. Make sure that you are looking at the relevant standards for your type of establishment before you begin to design your facilities. Some of the most popular public establishments’ guidelines are:

Restaurants, cafes, canteens and catering premises (non-liquor licensed)


  • 1 WC for every 100 males up to 400 and then 1 for up to every additional 250 males
  • 1 urinal for every 50 males
  • 1 Washbasin per WC and 1 for up to every 5 urinals


  • 2 per 50 users up to 200 users and 1 for up to every additional 100 females
  • 1 washbasin per WC

Non-liquor licenced buildings used for public entertainment


  • 1 WC for up to 250 users plus 1 for up to every additional 500 males
  • 2 for up to 100 users and 1 for up to every additional 80 males
  • I per WC and 1 for every 1-5 urinals


  • 2 WCs for 40 females, 3 for 41-70 females, 4 for 71-100 females plus 1 for up to every additional 40 females
  • 1 washbasin, plus 1 for every 1-2 WCs

Public houses and licensed bars


  • 1 WC for up to 150 users plus 1 for up to every additional 150 males
  • 2 urinals for up to 75 users and 1 for up to every additional 75 males
  • 1 Washbasin per WC and 1 for each 1-5 urinals


  • 1 WC for up to 12 females, 2 WCs for 13-30 females plus 1 for up to every additional 25 females
  • 1 washbasin per 2 WCs

Other Considerations to Improve Your Public Washrooms

There are also some public bathroom interior design ideas to keep in mind which can improve the usability of your facilities:

  • Use a material that is easily cleaned
  • Good ventilation can keep your facility fresh
  • Facilities shouldn’t be visible from the entrance
  • The more hands-free your facility is, the more hygienic
  • Directional and gender signage should be obvious
  • Fit urinals with a sensor-operated flush
  • Baby-changing facilities should be accessible to all
  • Fit grip handles in disabled cubicles or along walls to assist the not-so-physically able.
  • Equal Accessibility
  • Privacy


Spectrum Interiors have extensive experience in designing and fitting out quality public bathrooms and WCs to a high standard.  Our designers have access to a wide range of toilet cubicle and vanity unit materials, along with the knowledge of how to use them to create robust, functional and designer finishes.  Our team is professional and friendly, offering a smooth process from the initial meeting to the final installation. If you’d like more information on how we can assist you in designing the best suited facilities for your establishment, get in contact today. We’ll be happy to help you with any queries you may have.

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