A method and related system for determining energy savings that result from improvements made to a structure includes auditing the structure before the improvements are made to create a mockup of a section of the unimproved structure. The structure is then fully improved, and the mockup is disposed near a region of the improved structure that is to be monitored. The mockup may be thermally isolated from the improved region. An energy-related value, such as temperature, is then measured from the mockup and from the improved region of the structure. The mockup provides a baseline value, while the improved region provides a post-improvement value. Utilizing these measured values, the energy savings resulting from the improvement made to the structure can be determined.