In decades-long collaboration with architects Conrad Buff III and, later, Calvin C. Straub and others, Hensman created hundreds of contemporary homes ranging from budget-minded dwellings to opulent celebrity sanctuaries. Among them were two of the legendary Case Study Program houses, No. 20 and No. 28. Conceived by John Entenza, editor and publisher of the avant-garde monthly magazine Arts & Architecture, the Case Study project was intended to foster the creation of modern, easily constructed and affordable housing prototypes.