The timber-clad clubhouse, in Victoria Park, was built in the early 1980s and will be revamped inside and out.
The application was approved during a meeting of the planning committee on Thursday (May 12).
Plans to build a larger clubhouse on the site were approved in 2020 but fell through for financial reasons.
To view the application, log on to pa.midsussex.gov.uk and search for DM/22/0860.