The 20,000-square-foot, two-and-one-half-story Tudor Revival manor house of Highlands Ranch includes an octagonal cobblestone windmill added during the 1930s. Rancher John W. Springer built the house and added to it over twenty years, accounting for approximately 60 percent of the building today. Second owner Frank E. Kistler engaged Jacques Benedict to remodel the house in the Tudor Revival style. The sprawling, irregular “castle” lies under shake shingle roofs bristling with a multitude of dormers, finialed gables, decorative chimney stacks, and a central, square, four-story tower with a crenelated parapet. Three-and-one-half-foot-thick rhyolite walls rise to upper walls clad in stucco and half-timbering. Fenestration includes varied use of arches and mullions in many small-paned casements, with lancet windows in the tower. A two-level balustraded terrace surrounds the main entrance. Surrounding frame barns, sheds, a shop, and several bunk-houses survive along with the ranch house, which is now a centerpiece and events center for Colorado's largest subdivision.