Tim Gallagher stands on the rear deck of his new home in Crowley Lake, a town about 15 minutes south of Mammoth Lakes. The house, designed by Tim’s brother, Dan, is conceived as a series of stacked boxes sheathed in glass, cement board and corrugated metal that will require little maintenance. The result is a constructivist homage to the craggy peaks of Mammoth — and a departure from the traditional wood cabins that have long defined residential architecture in this region. Three bedrooms lie on the top floor, which cantilevers over the second floor and its public spaces: living room, kitchen and dining area. The bottom floor includes a rental apartment.