What is benchmarking?

Simply put, benchmarking is measuring a building's energy use over time. With this information, building owners can better understand how their building consumes energy relative to the performance of similar buildings. This comparison then helps to identify opportunities to make changes that will improve the efficiency and performance of the building.



Green PSF

Reporting Schedule

January 15

May 1

September 1 

Annual date for City to publicly post list of buildings required to benchmark and report data

Annual date for property owners to submit Energy Performance Reports to the City of South Portland through Portfolio Manager


Annual date for the City to publish Benchmarking results


What does the Benchmarking Ordinance require?

Under the Benchmarking Ordinance, covered property owners are required to track monthly energy and water use. Annually, property owners will be required to submit an Energy Performance Report to the City of South Portland through ENERGY STAR Portfolio Manager. 

ENERGY STAR Portfolio Manager is a free EPA program to help property owners organize and report energy and water use. Portfolio Manager normalizes energy and water use to allow for comparison to similar buildings.

In the first year of implementation, the City will publicly report the status of compliance for covered properties. In subsequent years, the City will publicly report energy consumption statistics in addition to the status of compliance.

Text of the Energy and Water Use Performance Benchmarking Ordinance


History of the Ordinance

The Comprehensive Plan, Climate Action Plan, and Mill Creek Master Plan identify energy efficiency and conservation as a core part of the sustainable development vision for South Portland. The idea of benchmarking came out of the development of the Mill Creek Master Plan by the Comprehensive Plan Implementation Committee. As the Comprehensive Plan amended zoning rules for Mill Creek to allow taller buildings, greater residential density, and mixed uses, the Committee recommended requirements that overtime make Mill Creek more environmentally sustainable. The approach chosen by the committee was benchmarking. In the process of development, the ordinance was reviewed as a part of a Planning Board public hearing and a City Council workshop.

Benchmarking Background Files