The groundbreaking green design of this government-office building by 2005 Pritzker Architecture Prize–winner Thom Mayne means major savings in energy – and taxpayer dollars. Open layouts eliminate internal political battles over corner offices, providing direct sunlight, natural ventilation and views for 90% of work stations. Critics call it a fortress and employees call it chilly, but it adds green distinction to the otherwise bland industrial skyline of SoMa warehouses.