In 2014, the Preservation Green Lab used statistical analysis and spatial modeling to measure the impact of older, smaller fabric on the performance of Seattle, San Francisco, and Washington, D.C. This report brings that methodology to a new location: Tucson, AZ. A collaboration with the city preservation office, Older, Smaller, Better in Tucson: Measuring how the character of buildings and blocks influences urban vitality in a Southwestern city, shows the role that older buildings play in a strong local economy and thriving street life.