Mayer Hall, one of the first buildings to be constructed on the University of California San Diego campus, has housed physics research since the 1960's. Sited between Ridge Walk, a major pedestrian spine, and Eucalyptus Grove, the campus' major landscape feature, building upgrades included a complete renovation and 45,000 SF addition by MBT Architecture (now Perkins & Will). JETT designed flexible hardscape and landscaped open spaces for the project. An urban plaza connects existing buildings to the new addition and ridge walk, creating a fresh ground plane designed for pedestrian circulation. A terraced north lawn and walk connects the plaza to many campus destinations and melds the Eucalyptus Grove with the new building and plaza. Construction completed in 2009.