In what year was the historic house located adjacent to the summit building built?
1853
Mount Washington State Park
Mount Washington State Park is a 60.3 acre parcel perched on the summit of Mount Washington, the highest peak in the northeastern United States.
 Summer seasonal amenities include a cafeteria, restrooms, gift shops, the Mount Washington Observatory and its museum.
 The historic Tip Top House is located adjacent to the summit building and is open (small fee) to visitors from early May to early October.
 The park is accessible by the Mount Washington Auto Road, the Mount Washington Cog Railway, the Appalachian Trail, or numerous other hiking trails from surrounding trailheads including Pinkham Notch, Crawford Notch and the Cog Railway base station.
Tip-Top House
The Tip-Top House is a historic former hotel in Mount Washington State Park in Sargent's Purchase, New Hampshire, United States.
 Built in 1853, it is the oldest surviving building in the summit area of Mount Washington, and is believed by the state to be the oldest extant mountain-top hostelry in the world.
 It features exhibits concerning the mountain's history.
 Located near the modern summit building and other visitor facilities, it is open for a fee to visitors from early May to early October.
 It was added to the National Register of Historic Places in 1982.
Errea House
The Errea House is a historic house located at 311 S. Green St. in Tehachapi, California.
 The house is the only surviving building from the settlement of Tehichipa, the first town in the Tehachapi area.
 Tehichipa was founded in 1869, and the house was built sometime between 1870 and 1875.
 In 1876, the Southern Pacific Railroad bypassed Tehichipa, instead establishing a new townsite at Tehachapi Summit, which later became Tehachapi.
 The railroad led to the decline of Tehichipa's shipping industry, and the town's residents gradually moved to Tehachapi.
 The Errea House was moved to Tehachapi as well around 1900.
 No buildings from the original settlement survive at the site of Tehichipa, and the Errea House is the only building remaining from the town.
 The Errea House is now located across from the Tehachapi Museum, where it helps illustrate the city's early history. H. B. Ailman House
The H. B. Ailman House is a historic house located at 314 W. Broadway in Silver City, New Mexico.
 Prospector Henry B. Ailman had the house built using his profits from the Naiad Queen Silver Mine in Georgetown; his business partner H. M. Meredith built an identical house next door, which has since been demolished.
 The brick Victorian house features a 2 ⁄ -story square turret, which Ailman used to watch for Apache attacks on Silver City.
 Ailman and Meredith attempted to found a bank in Silver City, but it failed in 1887; Ailman's house changed owners several times in the following decades.
 The city took ownership of the house in 1926 and made it the new City Hall.
 The house became a firehouse after a new city hall was constructed.
 In 1967, the Silver City Museum opened in the house.
 The property today remains in operation as a historic house museum. Bowman House (Wisconsin Dells, Wisconsin)
The Bowman House is a historic house located at 714 Broadway Street in Wisconsin Dells, Wisconsin.
 The Prairie School house was built in 1904 for Abram and Alberta Bowman.
 The house has a Prairie School design, popular at the time due to Frank Lloyd Wright's influence; its distinctive Prairie School elements include a horizontal emphasis and a low roof with wide eaves.
 Abram Bowman died in 1907, and his daughters Emma and Jennie Bowman inherited the house.
 Jennie Bowman had the house converted to a vacation home for working women upon her death in 1934.
 The house remained a vacation home until 1977, when the Dells Country Historical Society converted it to a historic house museum. Coal House (Williamson, West Virginia)
The Coal House in Williamson, West Virginia is a unique building built of coal masonry.
 The bituminous coal was quarried as blocks and dressed as stone using 65 tons of coal from the nearby Winifrede Seam.
 At the time of its construction it was the only coal building in West Virginia.
 The house was designed by architect Hassel T. Hicks of Welch, West Virginia and supervised by David M. Goode.
 The coal masonry was varnished for weather-resistance.
 Located adjacent to the Mingo County Courthouse, it houses the Tug Valley Chamber of Commerce. Samuel Merrill House
The Samuel Merrill House is a historic house located at 1285 N. Summit Ave. in Pasadena, California.
 Noted Pasadena architects Charles and Henry Greene designed the American Craftsman style house, which was built for conservationist Samuel Merrill in 1910.
 The single-story, "L"-shaped house is built from redwood and Arroyo stone, giving it a natural appearance; it also uses clinker brick for decoration.
 The house's gable roof features overhanging eaves and exposed rafter tails, characteristic features of Craftsman design.
 Several pairs of banded casement windows, many with wooden frames, are located throughout the facade.
 The house is considered one of the best-preserved small houses designed by Greene & Greene. Eutaw–Madison Apartment House Historic District
Eutaw–Madison Apartment House Historic District is a national historic district in Baltimore, Maryland, United States.
 It consists of a group of three multi-story apartment buildings built in the first quarter of the 20th century.
 They are: The Esplanade, a 9-story apartment building built in 1912; the Emersonian, an 8-story building constructed in 1915 of stuccoed masonry; and Temple Gardens, a 14-story building built in 1926.
 The district is significant in part because of its association with Baltimore's Jewish community.
 During the 19th century, the Eutaw–Madison neighborhood became a center for the Jewish community in Baltimore.
 By the 1920s the neighborhood had been established firmly as a neighborhood of middle and upper-class Jews, many of whom were professionals and merchants. Mount Saint Joseph (West Virginia)
Mount Saint Joseph, also known as Holloway Estate, is a historic house and motherhouse located near Wheeling, Ohio County, West Virginia.
 The Holloway House was built in 1854, with two additions dated to the 1920s.
 The original farmhouse is two stories and measures 35 feet by 45 feet.
 The 1920s additions include one with a garage and apartment above, and an "L"-shaped addition which became the main living quarters.
 Located on the property is an immense, three winged structure built as the motherhouse for the Sisters of St. Joseph.
 It is a Modern building built in 1954-1956.
 Also on the property are a contributing cold storage building, spring house, and bathhouse. Old Constitution House
The Old Constitution House is a historic house at 16 North Main Street in Windsor, Vermont.
 It is the birthplace of the Vermont Republic and the Constitution of the State of Vermont.
 A mid-18th century building built in a simple Georgian architectural style, the Old Constitution House was originally called the Windsor Tavern, and belonged to Elijah West at the time of the signing of the constitution.
 The house is a Vermont State Historic Site, and is administered by the Vermont Division for Historic Preservation.
 It is also listed on National Register of Historic Places, separately since March 11, 1971 as well as a part of the Windsor Village Historic District since April 23, 1975.