Completed in 2013, this house started as a traditionally-styled 1,800 sf., single story, two bedroom, one bath home and became an all-new warm contemporary 2,700 sf., two story, four bedroom, three bath residence for a family of five. The budget dictated the re-use of the existing foundations, garage and far right ground floor bedroom footprint. The City of San Mateo had strict planning rules prohibiting contemporary design, but the end result, a blend of traditional and contemporary, has become a model project for the city. Being environmentally conscious, the owners utilized radiant hydronic heated engineered fumed-oak floors. They opted for fully operable windows with good cross-ventilation and a whole house fan instead of installing gas furnaces, ductwork, or air conditioning. The new second floor conceals a 3 kW solar photovoltaic system that cannot be seen from the street. The rock formation in the front yard is one of two bioswales that hold roof rainwater temporarily for slow dissipation into the city's storm water system. Photo Credit: Paul Dyer Photography