The new block, in the Hazelgrove Road car park, will include a Changing Places facility for people with disabilities as well as male and female lavatories.
The application was approved during a meeting of Mid Sussex District Council’s planning committee on Thursday (May 12).
To view the application, log on to pa.midsussex.gov.uk and search for DM/22/1098.
More information on Changes Places facilities are available online at https://www.changing-places.org/