DOVER—Colliers, a global leader in commercial real estate services, is pleased to announce the sale of the seven unit multifamily at 511-517 Central Ave. in Dover. According to the Strafford County Registry of Deeds, the sale price was $1,470,000. Abigail Bachman and David Choate, of Colliers’ Portsmouth office, procured the Buyer, Portsmouth Realty LLC. Arthur Pappas, of Keller Williams Coastal Realty, represented the Seller in the transaction. The 7,700 SF building consists of five residential units and