Ecological buildings and neighbourhoods started to be constructed in the 1970s as a response to the energy crisis following the oil embargo and a growing sense of environmental awareness. While most of the achievements at that time took place in housing design, notable works were also done in the field of office buildings. Since then the attention of architects, clients and policy makers has been increasingly drawn to the energy and environmental dimension of office spaces, eventually prompting a whole new research agenda and literature on the subject.