The main research question in this study is ‘what are the differences between the influence and collaboration of the stakeholders in developing an office building with a low building-related energy usage and an office building with a conventional energy performance’?
Firstly a literature study defined what an office building with a low building related energy usage is. Secondly, a case study was conducted to test two office buildings according to the definition of an office building with a low building related energy usage. To be defined as a office building with a low building related energy usage, the buildings have to take measures in all three steps of the Trias Energetica and score at least 55% on the energy aspect of the BREEAM-NL methodology.
Given the information of the literature study and the object related case study the development processes of the two cases were compared regarding the role and influence of multiple stakeholders. The research showed that the case studies differed compared to the findings in the literature, but had only a minimal difference with each other due to different types of contracts. The so called hard gates differed with the literature due to the moments in the process when contracts are signed in the Dutch practice.
Thirdly, the influence of the different stakeholders within the development process of the two cases was inquired by making use of interviews. In these interviews the stakeholders were asked to score themselves and the other stakeholders in the different sub-phases of the development process in the actual situation as it occurred and in the hypothetical situation the stakeholders thought it should be. It can be concluded that in the hypothetical situation, the HVAC advisor should have more influence early on in the development process.
Finally, the arguments to develop an office building were examined for the case studies and compared with the reasons given in literature. The conclusion was that most important argument to develop an office building with a low building-related energy usage was the corporate image of the company. The main reason to develop a conventional building instead of an office building with a low building-related energy usage is the extra investment needed for the additional energy techniques.
This study gives a structured way to examine office buildings, especially to show to difference in building-related energy usage. This study recommends a development team for office buildings with a low building related energy usage in which a project developer, an architect, the buildings future user and the HVAC advisor combine their knowledge and take decisions together as early as the Structural Design phase.