The Prairie Homestead is a sod house located at 21070 South Dakota Highway 240 north of Interior, South Dakota. The house was constructed by Ed Brown and his wife in 1909. The Browns built their home with sod bricks and topped it with a grass roof. Western South Dakota was one of the last regions of the state to be settled by homesteaders, and the house is now one of the few remaining sod homes in the state.