The best way to learn how to benchmark your building with ENERGY STAR Portfolio Manager is to attend a free class provided by PG&E at the Pacific Energy Center. The classes show you step-by-step how to track energy use, reduce energy costs, and comply with state and local requirements that may apply. You could also get help from a professional, or a free webinar.
Commerical buildings 10,000 square feet and larger are required to benchmark with ENERGY STAR Portfolio manager in accordance with San Francisco's Existing Commercial Buildings Energy Performance Ordinance.