Terrace Hill, also known as Hubbell Mansion, Benjamin F. Allen House, and Iowa Governor's Mansion, is the official residence of the Governor of Iowa. Located in Des Moines, Iowa, it is an example of Second Empire architecture. The home measures 18,000 square feet (1,600 m²). It sits on a hill overlooking downtown Des Moines, and has a 90 foot (27 m) tower that offers a commanding view of the city. The house became a National Historic Landmark in 2003.
Terrace Hill is located at 2300 Grand Avenue, south of Interstate 235. Most visitors stop first at the Carriage House, which is located near the house. Nowadays the building is used as a reception area for most visitors who arrive to tour the home. It also contains permanent and unique changing exhibits - such as a permanent display on the previous owners of the house, the Hubbell family.
Terrace Hill is open for guided tours from 10:00am to 1:30pm, Tuesday through Saturday, March through December. The tours are available at 10:30 a.m., 11:30 a.m., 12:30 p.m. and 1:30 p.m. The tour usually lasts approximately 1 hour. During December the mansion is decorated for Christmas as part of the Holly & Ivy tour, which includes several other mansions in the Des Moines area.