The concept of the kit house likely originated in the U.K., but after these mail-order residences were introduced to the U.S. market in the late 19th century, they became synonymous with the American dream.
Advertised in manufacturing catalogs, the typical kit house offered buyers pre-cut materials to assemble into permanent residences and could be shipped around the country. Though early versions were primarily simple wooden structures, by the early 20th century, Sears, Roebuck & Co. and other manufacturers also provided all heating, electrical, and plumbing components. (Concrete, brick, and masonry was not included and usually acquired locally.) Eventually, manufacturers began to market these kit houses as “vacation cottages” and “bungalows” to expand their use and applications. Sears Roebuck is estimated to have sold 100,000 catalog homes in the U.S. between 1908 and 1940, with probably the heaviest individual sales years before 1929.
The Check is in the Mail (And so is the House): An Analysis of the Short Lived Catalog Home Phenomenon (link)