The 2020 Green Building Award, cosponsored by Sustainable San Mateo County and the American Institute of Architects, San Mateo County Chapter, was presented to the Genentech Child Care Center, which has earned LEED V4 Platinum Certification and has demonstrated net zero energy via on-site metering. Opened in June of 2018 on Genentech’s South San Francisco campus, the 56,000-square-foot Child Care Center used a holistic design approach, with emphasis on building performance, environmental protection, and human health and well-being. It was designed by Perkins & Will of San Francisco and constructed by Rudolph & Sletten of San Carlos. The single-story structure features a saw-tooth roof with clerestory, which maximizes diffused light, limits glare and reduces the need for electric lighting. Its prefabricated mass timber structural elements, which are relatively new to North America, are integral to the interior design and resulted in significant construction schedule savings.