According to the National Parks Service: The inn is built in the Greek Revival style and is rectangular in plan with an early one story addition that served as a summer kitchen. The large, double-decked porch or gallery was used for circulation. On the second level of the front facade, French doors opened onto the roofed portico. The building has an entry hall with a grand staircase with a winding return at the top, a living room, and great room on the first level of the main section. The simple yet substantial architecture of the house was once typical of prosperous middle-class urban and rural dwellings in central Indiana. Few examples remain today.
For more on the Michigan Road, see Clio entry: Michigan Road Toll House