The Common Carbon Metric 2.0 (CCM2.0) is a tool for measuring building energy related greenhouse gas (GHG) emissions and energy savings potential of the stock of new and existing buildings in an investment portfolio, municipality, region or country.
CCM2.0 generates an energy demand and GHG emissions base-line and enables the development of energy saving and GHG mitigation scenarios that can be used to support applications for climate finance for mitigation actions in the buildings sector under UNFCCC mechanisms such as the Nationally Appropriate Mitigation Actions (NAMA) and the Green Climate Fund (GCF.)

The tool is based on a calculation methodology that conforms to ‘measurable, reportable and verifiable (MRV)’ data standards. It supports:

  • Measurement of energy use and related GHG emissions from buildings & serves as the basis for assessing the 
potential for certain mitigation actions 

  • Reporting on the country’s/city’s GHG emissions and appropriate mitigation actions 

  • Verification of the compliance with mitigation commitments by enabling updating of energy use and emissions data over time.


CCM2.0 is the updated version of the original Common Carbon Metric 1.0 tool that was developed by the UNEP Sustainable Buildings & Climate Initiative (SBCI) between 2009 and 2013. The CCM1.0 was a spreadsheet-based tool that established the basic metrics and calculation methodology for generating MRV base-lines for energy-related GHG emissions from stocks of buildings. For more information on CCM1.0 follow this link.

The CCM2.0 project has moved the CCM to an on-line data-base structure, which enables more efficient data-entry, project comparisons and the capability for open-linked data sharing. It has initially been developed to support  The UNEP DTIE ‘NAMAs for the Building Sector in Asia’ project which commenced in October 2013 and will conclude in 2017. Its objectives are to identify and recommend actions for development into NAMAs for Indonesia, the Philippines, Thailand and Vietnam. This project will develop and refine MRV tools to quantify the energy savings and related GHG mitigation potential of their building sectors, and, including providing MRV tools and an overall framework to support NAMA development by these countries. More information on this project can be found here.