An environmental certificate gives information about the characteristics of the building today, but does not, as the current study shows, guarantee future performance. The question investigated in this study is if there are any demands at all on a newly constructed and certified building to provide any form of information that shows that the building actually perform according to the promises of the certificate. If there is, then which certificate does have these criteria and how common is it? This report is an attempt to compare popular environmental certificates for newly constructed buildings, but from the perspective of their demand of follow-ups. From the point of view of a property investor and a valuation professional, it should be of interest to identify measurable parameters that could provide historical performance data on a building. Also from an environmental perspective actual long term performance should be most important. In the paper we formulate three conditions that a long term credible environmental rating system should fulfill: any certificate should only be preliminary until it has been verified by actual performance metrics, continuous monitoring should be done and it should be mandatory to re-evaluate the building every fifth year according to updated versions of the rating system in question

It is known that certified buildings can fetch a higher price on the market, but that it is related to the certificate rather than the performance. If those price premiums are to continue existing, there is a need to be able to prove that certified sustainable buildings also perform according to expectations. The aim of this paper is to try and identify a minimalized shortlist of performance metrics that have the potential to affect market price in commercial real estate. By addressing sustainability assessment schemes in comparison with the RICS sustainability checklist, Due Diligence studies and previous studies on what is technologically available, a shortlist comprised of nine key performance indicators is proposed that can help understand more about the connections between sustainable performance of commercial buildings and market price. The list covers the basic categories of emissions, energy, water and materials and can provide an idea of the environmental performance of the building while in operation. The idea is to use the information provided from this shortlist in valuation reports, and in this way it will be possible to identify connections between specific performance metrics and market price in the future.