As well as tennis, there are outdoor pitches for football and cricket at the site on New Oxford Road.
Chair of Mexborough Tennis Club, Chris Skelton, said: “The club had new courts done back in the mid-1990s and nothing has been done since. We’re completely renovating the facilities.
“We’ve never had floodlights before, so that’s going to improve playability throughout the year, which should be fantastic for everybody concerned.”
Shaun Bennett from Mexborough Miners’ Welfare added: “The funding is a fantastic boost for Mexborough Miners’ Welfare, the tennis club and the wider community. These improvements will create first-class facilities, encourage more people to get involved in tennis and ensure the courts can be enjoyed all year round.”
The tennis club said work was well under way and was expected to be finished before the end of July.