John Van Buren Wicoff and his wife Lavinia Applegate Wicoff had seven children while living in the Wicoff House. They built an addition to the house to accommodate their growing family. In 1929, they added a sunroom to the house. They sourced hand-painted tiles from the Herman Carl Mueller Mosaic Tile Company in Trenton. These architectural ceramics were done in the Arts and Crafts Style and featured brightly-colored glazes on local red clay. A Mueller Mosaic catalog from the 1920s showcased a multitude of designs, which John and Lavinia may have used to choose tiles to appeal to their children. Along the edge of the sunroom, tiles were placed low on the wall. They are too low for most adults to notice them, but are just the right height to delight small children.