NORWALK, CONN. — Fairfield County-based Angel Commercial has arranged the sale of an 18,500-square-foot flex building at 507 Westport Ave. in Norwalk. The sales price was $2.2 million. Brett Sherman of Angel Commercial represented the undisclosed buyer in the transaction. The seller was also undisclosed. The buyer plans to put capital improvements into the property and will occupy part of the building for its own use. The property is located in between Westport and Norwalk and is accessible from I-95 and Route 7.