There are well-established best practices for delivering energy-efficient buildings on the path to net-zero. After site selection and building orientation, perhaps the most important consideration is the building enclosure or envelope. Next, the energy conservation measures (ECMs) are determined based on the envelope’s predictive energy-efficiency performance; they also include lighting, HVAC equipment, and controls. The last step for high-performance, low-energy buildings involves designing performance contributions of renewable energy technologies.