Energies 2013, 6, 2407-2427; doi:10.3390/en6052407 OPEN ACCESS energies ISSN 1996-1073 www.mdpi.com/journal/energies Article Greening Public Buildings: ESCO-Contracting in Danish Municipalities Jesper Ole Jensen 1,*, Susanne Balslev Nielsen 2 and Jesper Rohr Hansen 1 1 Department of Town, Housing and Property, Danish Building Research Institute, A.C.Meyers Vænge 15, Copenhagen DK-2450, Denmark; E-Mail:
[email protected] 2 Department of Management Engineering, Technical University of Denmark, Bygning 424, Kongens Lyngby DK-2800, Denmark; E-Mail:
[email protected] (S.B.N.) * Author to whom correspondence should be addressed; E-Mail:
[email protected]; Tel.: +45-9940-2358. Received: 27 February 2013; in revised form: 11 April 2013 / Accepted: 24 April 2013 / Published: 6 May 2013 Abstract: This paper presents current research on Danish municipalities’ use of Energy Service Companies (ESCO) as a way to improve the standard of public buildings and to increase energy efficiency. In recent years more and more municipalities have used ESCO-contracts to retrofit existing public buildings, and to make them more energy efficient. At the moment 30 municipalities (of the 98 municipalities in Denmark) are involved in, or preparing, ESCO contracts. Nevertheless, ESCO-contracting still faces many challenges on the Danish market, as there is a widespread skepticism towards the concept amongst many stakeholders. The purpose of this paper is to discuss the various experience gained so far by municipalities use of ESCO-contracting, the different approached to ESCO-contracting being used in practice, as well as the different viewpoints drivers and barriers behind the development.