The U.S. Postal Service plans to sell its downtown Naperville facility and lease a substantially smaller space in the 70-year-old building.

Naperville Bank & Trust, a subsidiary of Wintrust Financial Corp., signed a contract last week to purchase the building and the bank will take occupancy in the fall, according to Jones Lang LaSalle, which is representing the Postal Service.

Under terms of the transaction, the Postal Service  will lease 2,000 square feet in  the building to continue offering retail services to customers.

Jones Lang said it is also marketing six other current and former local postal offices for sale:  1950 Bentley Ct. in Glendale Heights; 417 Des Plaines Ave. in Forest Park; 1405 W. Main St. in St. Charles; 26 S. Third St. in Geneva; 2800 St. Charles Rd. in Bellwood; and 611 S. 8th St. in West Dundee.