Photo: The John and Elvira Doud House (Denver Square), ca. 1905, located at 750 Lafayette Street in Denver, Colorado. Listed on the National Register of Historic Places in 2005. Photograph by user: Jeffrey Beall, own work, 2009, [cc 3.0] via Wikimedia Commons, accessed April, 2013.
The American Foursquare was a popular mail order style built in large numbers across the United States. The design is space-efficient and most often built on narrow lots making it economical for the middle-class budget. These houses are nearly always square. Four Square (or Box Prairie) houses are considered a subtype or close relative of the Prairie style.
Identifying features include:
Some locations with references to American Foursquare style homes: