This paper describes the development of a straightforward approach to the environmental benchmarking of whole stocks of non-domestic buildings. This approach provides a quick and easy method for property managers to produce an environmental profile of their stock. An environmental profile of a stock of property can be used: as a key part of environmental management and reporting practices, as an aid to making investment decisions on renovation, disposal or purchasing, to manage risk by highlighting poorly performing buildings and as an integral part of the cost accounting for the portfolio (the DETR policy paper 'Building a better quality of life' states that from the year 2001 commercial property owners will be expected to pay a Climate Change Levy (or tax) on their business-related CO2 emissions) 8 pages.