Three new tenants, including a new restaurant, have signed leases totaling more than 10,000 square feet at the Presidents Place office complex in Quincy.

Beacon Clinical Research signed a 10-year lease for 6,000 square feet and will move into the building in November.

Cellar Door, a restaurant specializing in American cuisine, signed a five-year lease and will open this fall. Mass Bay Credit Union leased 1,700 square feet for five years and is slated for a fall move-in date.

Developer Related Beal of Boston and New York acquired the eight-story, 350,000-square-foot building at 1250 Hancock St. in December 2012 for $44.5 million and has been upgrading common areas and the parking garage. The complex is now 93-percent leased.

"The significant investments we are making at the property are paying off," Stephen Faber, an executive vice president at Related Beal, said in a statement. "As we anticipated, downtown Quincy has a lot to offer employers. One of our focuses is to revitalize and activate the superior ground floor retail presence at Presidents Place. The new restaurant, bank and Quincy College’s addition of a Barnes & Noble bookstore are a great start."

Related Beal was represented by Thomas J. Kent, executive vice president at Jones Lang LaSalle, in the Beacon Clinical transaction and Sean Kenealy of Key Realty Inc. in the Cellar Door and Mass Bay Credit Union transactions. Beacon Clinical Research LLC was represented by Peter Holland, senior vice president of Advisory Services at Goman & York Property Advisors, and Mass Bay Credit Union was represented by Colliers International.