The modular two-story steel-and-glass structure sits atop a windy ridge on the city’s western edge, near Red Rock Canyon. Its prefabricated components—steel-frame modules that were prepared with finished floors, walls, doors, and fenestration, or were designed as canopied or trellised decks—were all made in Marmol Radziner’s home-building factory, near Los Angeles, and trucked over to the one-and-a-half-acre site.