The former manufacturing plant surrounding the Guinness Open Gate Brewery has hit the market as Diageo North America Inc.’s presence in Baltimore County continues to shrink. Diageo listed the 45-acre property — which does not include the Open Gate Brewery — at 5001 Washington Blvd. last week in another move toward downsizing at the site in Relay near Interstates 95 and 895. A leasing brochure from JLL, hired to handle the sale, says the deal aims to close by early October.
