Stakeholders are considered to be one of the key drivers for any construction project. On the other hand, the performance of construction projects is primarily driven by sustainability-related targets. Hence, there is a need for a systematic approach to engage the stakeholders, as part of the Project Management process, to achieve the construction sustainability. This research focused on stakeholder engagement with the aim to improve the construction project performance through achieving construction sustainability. A framework is developed which integrates stakeholders with sustainability driven project performance. This research performs an empirical investigation through mixed-method research as the appropriate research technique. Data collection of this research is carried out in two stages. A series of semi structured interviews were carried out with 16 experienced UK construction professionals. Prior literature were used to design the interview questions about different issues related to the stakeholder engagement, construction sustainability and construction project performance. The aim of the interview is to investigate the current issues and practices of the construction projects are facing relating to engaging stakeholder to make the construction sustainable to improve the construction project performance. Some of the hypotheses are generated relating to the findings from the interviews and literature reviews. After analysing the interviews, a questionnaire is designed based on the findings from the interviews. Questionnaires were mailed to 500 UK construction companies and 233 (46 per cent) responses were received. The aim of this survey is to find out a structured and appropriate methodology to accomplish the requirements of making the construction sector more sustainable by improving its performance. Typically, questionnaires will be used to get the participants opinion in order to produce data to follow. These data will be used to test the hypothesis. These two approaches were adopted to align the participant’s opinions and beliefs and to develop jointly acceptable strategies with agreed long-term, sustainable solutions. Statistical Package for Social Science [SPSS] is selected and used to analyse the questionnaire responses. Correlation analysis revealed that the extent of the impact of stakeholder engagement to achieve the construction sustainability and improving the construction project performance. ANOVA revealed the variation of the perception of participant’s roles and companies’ strategic focuses towards the stakeholder’s engagement, construction sustainability and construction project performance. In essence, adhering to the various levels of implementation presented will ensure that construction sector can derive the maximum benefit from stakeholder engagement and that the decision-making process and the actions regarded as critical are taken into consideration. Based on the findings from the interview and questionnaire survey a conceptual framework is set out that underline the preparation and presentation of stakeholder engagement to improve the construction project performance through achieving construction sustainability. This derived framework demonstrates that such engagement can be valuable in anticipating the expectations of the different stakeholders from the projects, which may impact on behaviour. Finally, this research provides recommendations from both a theoretical and practical point of view to improve the stakeholder’s impact on construction sustainability and construction project performance.

Abstract Today's society is developing towards a more conscious and dedicated attitude concerning the need for sustainable businesses. To ensure that the construction business who is responsible for massive impacts to environment and the society, the legislation demanding sustainability reporting has been passed in the EU. The purpose of this legislation is to force companies to include the environmental and social aspects of their operations and not just the economic. The purpose of this study is therefore to investigate how the construction companies in Sweden has been affected due to the legislation on sustainability reporting. The aim of this study is, through a qualitative working method, to answer which governing instruments the construction companies use in order to implement sustainability in the entire organisation on a day to day basis. The study has investigated four construction companies largely based in and around the three biggest cities in Sweden, Stockholm, Gothenburg and Malmö. The interviewees in each company has a role in which they are involved in the strategic operations towards sustainability. The aim is here for the study to answer which governing instruments has been the most influential and successful. The results of the study reveals that beyond the legislation each company has a very different approach and layout concerning the sustainability reporting. The reason for this is because each company has different guidelines through frameworks and certification standards. Depending on what they consider to be vital elements to report, the reportings differ leading to different forms of governing throughout the companies. This also shows that the most successful governing instruments differ as well. Although the study concludes that the companies have mutual governing instruments in the form of education for the employees to enhance competence. It also shows that they all use instruments impacting employee values which leads to a comprehensible understanding of the company’s visions and guidelines.