Thanks to a streamlined, waste-free construction method and affordable materials, like unembellished cement board cladding and Minarc’s signature Cradle to Cradle–certified mnmMOD panels, the firm’s three 1,200-square-foot homes came in at the requisite $150 per square foot—including foundation, transportation of the modular components, and rooftop solar panels, from Grid Alternatives, that offset 95 percent of the structures’ energy demands.