The West Mountain Historic District is a 425 acres (172 ha) historic district

Historic district (United States)

In the United States, a historic district is a group of buildings, properties, or sites that have been designated by one of several entities on different levels as historically or architecturally significant. Buildings, structures, objects and sites within a historic district are normally divided...

 northwest of the center of Ridgefield, Connecticut

Ridgefield, Connecticut

Ridgefield is a town in Fairfield County, Connecticut, United States. Situated in the foothills of the Berkshire Mountains, the 300-year-old community had a population of 24,638 at the 2010 census. The town center, which was formerly a borough, is defined by the U.S...

 in Fairfield County, Connecticut

Fairfield County, Connecticut

Fairfield County is a county located in the southwestern corner of the U.S. state of Connecticut. The county population is 916,829 according to the 2010 Census. There are currently 1,465 people per square mile in the county. It is the most populous county in the State of Connecticut and contains...

 that was listed on the National Register of Historic Places

National Register of Historic Places

The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

 in 1984. It includes 12 contributing buildings.

Its "grandest" house is "Orenica", described as "a 1932 Georgian Revival style stone structure of considerable pretension" that was home of Philip Dakin Wagoner (1876-1972), chairman of the board of the Underwood Corporation.