On the northeast corner of Ann St. and Fourth Ave. is the structure built in 1836 to house the short-lived Bank of Washtenaw. A stuccoed Greek Revival building, it was remodeled as a residence in 1847 for local businessman Volney Chapin, whose family lived there for almost thirty years.

It continued to play a role in the life of Courthouse Square as it was adapted for a sequence of businesses, including the Catalpa Hotel, Joe Parker's Saloon, the Chamber of Commerce, many service and welfare organizations, the local bus station, and the Peters Hotel.