The company needs the capital to buy 1.7 acres of land for a new brewery close to the international railway station in Ashford, Kent.
Chapel Down is selling up to 19% of its stock in its beer and cider business, Curious Drinks through the Seedrs website. The offering could in principle raise as much as £3.65 million.
New shareholders will receive free brewery tours, limited edition beers and substantial discounts among other benefits.
Qualifying investors will also be eligible for 30% tax relief under the Enterprise Investment Scheme.
Chapel Down has appointed two new non-executive board members to Curious Drinks to strengthen and support the management team.
Stewart Gilliland joins as non-executive chairman. He is currently non-executive chairman of Booker Plc and a non-executive director of Mitchells and Butlers plc. He has previously held senior positions at Labatts Canada and Inbev UK.
Rachel Montague-Ebbs, a fruit supply chain director with her own fashion business, joins him as a non-executive director.
Sales at Chapel Down were up 33% to £3.25 million in the first half of 2015.
Beer and cider sales were likewise up 33% year on year to just under £1 million. Wine sales grew by 45% over the period to £2.3 million.
The crowdfunding will close on February 29, 2016.