An extract from an interesting history of the company, from their web site :
Warren Paper Products Company was founded in 1921 by the late Donald M. Warren, as a manufacturer of setup paper boxes for the producers of candy, apparel, jewelry, and other items.
As a result of increasing demand in the early 1930's, and the war-caused shortage of metal toys during World War II, the company began producing dollhouses made of paperboard, colorful picture puzzles, paper forts, gas stations and miniature replicas of the Indianapolis 500-Mile Race Stadium. Antique toy collectors would recognize the name Built-Rite, a popular line introduced during this period. With increased sales, expansion soon became necessary, and the Company relocated to an old remodeled wagon wheel factory on the East Side of Lafayette in 1938. Warren is still located in this building at 3200 South Street.
During the 1940's and '50's, Warren Paper Products began manufacturing play environments for children consisting of paper towns, bridges, and trees and marketed them to major toy train manufacturers. In addition to these other products, the demand for the company's doll houses continued to increase. Many built as replicas of actual homes were marketed though Life Magazine and Time/Life, Inc. as a selling tool for the magazine's house plans.