High performing buildings consume considerably less energy and water than conventional buildings. Through energy modeling and water use projections, design teams have been able to calculate the amount expected to be saved during the design phase. However, not much has been done to circle back and compare these projections to actual performance. This pilot study compares actual operating results to predicted in 21 public buildings in Massachusetts to learn how accurate these projections are. The study also interviewed Town staff including facility managers to learn about problems faced and lessons learned during the initial years of a school or library’s operation to inform new projects moving forward.