WILMINGTON, DEL. — Patterson-Woods Commercial Properties/CORFAC International has arranged the sale of an office building located at 913 Delaware Ave. in Wilmington. Washington Street Realty Co. sold the property to 913 Delaware Avenue, a Series of KD Financial LLC for $1.9 million. The single-story property features 8,100 square feet of office space. Bart Mackey of Patterson-Woods Commercial represented the seller in the deal.