The Sausalito bungalow has a crisp new look, and much more living space, after the couple remodeled it between 2014 and 2019. They replaced the roof with standing-seam metal, seismically updated the foundations, and added a 600-gallon pillow tank that collects water from the roof for irrigation purposes. Improved insulation and a 2.2-kilowatt photovoltaic array vastly improves the home’s performance to near net-zero levels.