Oakland, California–based Michelle Kaufmann Design’s Sunset Breezehouse (2005) is their second prefab offering, following the success of the earlier Glidehouse (2004), both of which were designed for Sunset magazine. Kaufmann’s initial explorations into prefab occurred in the development of her own home, when a friend wanted the same design. She witnessed two approaches to the construction of the house: her own used traditional site-built construction techniques; and her friend’s was prefabricated in a factory. That experience demonstrated the benefits of adopting the latter method. The Sunset Breezehouse takes a particularly ecological orientation through its extensive use of small gardens, cross-ventilation, energy-efficient appliances and mechanical systems, and renewable and nontoxic materials. A major feature is its central breezeway—a living and dining space that sits beneath a distinctive, optional butterfly roof recalling mid-century designs. In a twist of contemporary technology, however, the roof shape helps conceal the glare from its optional solar panels. Large retractable glass walls open the central living space, virtually eliminating the distinction between inside and outside. The initial two-bedroom floor plan ranges in size from 1,730 to 2,020 square feet, with a third bedroom option created by adding an additional 248-square-foot module. While final costs vary depending on a variety of factors, the 1,800-square-foot model with its various upgrades was realized at about $155 per square foot.