Context - Globally, there is climate change that affects life of people and nature on earth. The built environment is responsible for nearly 40% of global energy consumption and approximately onethird of global CO² emissions (JLL, 2020). Therefore, the built environment must become more sustainable. Public and private parties incorporate sustainability ambitions into urban redevelopment plans, in a complex context with high ambitions and quality for high costs materials, labour and energy. All these factors put pressure on the feasibility of urban redevelopment plans. In the collaboration of public-private partnerships, there are these two conflicting interests that make it hard to develop the high requirements for urban redevelopment plans. Objective – This research aims to provide new insights in the relationship between the negotiation in the partner selection methods and incorporating sustainability ambitions in urban redevelopment plans. The main research question in this research is: “How can negotiations in partner selection methods contribute to the incorporation of sustainability ambitions in urban redevelopment plans?” Methods – This research consist of two parts. First, document and literature review provide a framework of definitions and processes from which the empirical part is studies. This empirical, second, part consists of explorative interviews, case study analysis and an expert panel. Results – The defined concepts form literature are: sustainability ambitions, partner selection methods, and negotiations for urban redevelopment plans. The findings of the empirical part state that negotiations occur in the two partner selection methods (partner selection method and tender) about the incorporation of sustainability ambitions. Both methods differ in moments and types of negotiations. Conclusions – The main conclusion is that negotiations contribute by having moments in which key stakeholders discuss about how the sustainability ambitions are incorporated in the urban redevelopment plan. In these moments different types of negotiation occur in which stakeholders deal with the sustainability ambitions. This research gives insights about negotiations in the process of the two selection methods and which elements are important for improving both. With this improvement, key stakeholders should be better able to negotiate about how to incorporate sustainability ambitions for urban redevelopment plans.