Washington’s Clean Buildings Act (2019) requires the State Commerce Department to set a state energy performance standard target (measured in Energy Use Intensity, or EUI) for each building type by 2020, and develop “conditional compliance methods” to meet them. Compliance methods may include 1) adopting an implementation plan to meet each building’s EUI target or 2) commissioning an energy audit and implementing all energy-saving measures predicted to save more money than they will cost. Covered buildings will be required to achieve their EUI targets or to comply with the Act conditionally. Buildings over 220,000 square feet of commercial space will have to do so by 2026; buildings over 50,000 square feet of commercial space will have until 2028.