The Carnahan House, in Boyce, Louisiana, was built around 1880 and was added to the National Register of Historic Places in 1995. It is a one-and-a-half-story frame galleried cottage built in a transitional Greek Revival/Italianate style. It was remodeled around 1900 by the addition of an Eastlake-style gallery. It is located near the Red River levee.