Dark Star brewery will increase capacity by 300 per cent after signing up to move to a new site.
The company is moving 11 miles from its current site in Haywards Heath, West Sussex, to a new site in Patridge Green. The brewery was originally founded in the cellar of the Evening Star pub in Brighton in 1996.
Dark Star director Paul Reed said: "This is the biggest investment we've made to date and despite the current economic climate it reflects our confidence in the long-term development of the real ale market.
"Our confidence is also boosted by the broad spectrum of people that are discovering real ale from across age and social groups; anyone who thinks they can caricature the cask ale drinker does not understand the market."
Dark Star, which currently produces 7,500 barrels a year, is expected to start brewing at the new site in October.
The Sussex brewer's American Pale Ale recently won gold at the Great British Beer Festival in the Golden Beer category and its coffee beer, Espresso, was crowned the World's Best Speciality Beer.