Public–Private Partnership (PPP) arrangements are used in different sectors in the provision of infrastructure and public services. The use of PPP agreements in urban regeneration projects, although more recent, has been gaining prominence in different contexts. However, in many cases, PPP projects have a controversial implementation, often not achieving the proposed objectives and presenting negative results. Their controversial implementation is the result of a lack of knowledge and lack of application of the best practices and Critical Success Factors (CSFs) associated with them. Based on this, the present study aims to identify and analyze the CSFs for PPP arrangements in urban regeneration projects. The study was conducted in two distinct parts. The first part consists of a literature review on the PPP CSFs in general. The second part consists of the development of a questionnaire seeking to identify the CSFs of PPP arrangements for urban regeneration projects. Based on the literature review and the questionnaire answers, the main success factors of PPP projects for urban regeneration were identified and structured in the framework with five main clusters: two related to the external environment (enabling environment and exogenous factors) and three related to the internal environment (preparation phase, procurement phase, and contract management phase).