Sewall Andrews helped plat Mukwonago, Waukesha County’s first community, in 1836. He then established the village’s first store and in 1842 built what may have been the county’s first brick house at a crossroads in the town center. Andrews’s Greek Revival house with its pedimented gable, off-center entrance with sidelights and transom, and pronounced cornice and frieze was stylish amid the neighboring pioneer buildings. Unusual rope-twist moldings and rosettes trim the entrance. As a shopkeeper with suppliers in New York, Andrews had access to manufactured design elements such as these. The house’s core retains its original character, but slightly later the owners added the frame north wing, then the south wing, originally a woodshed and chicken house. In the 1920s, a rear porch and the three chimneys were also added.