The purpose of this study is to describe and understand how the work with Knowledge Management (KM) is performed in the Swedish construction process of condominiums/rental apartments. This in order to develop a conceptual framework of the influence of culture, collaboration and trust on KM (tacit knowledge, explicit knowledge, the KM process, and knowledge sharing and transfer) in the Swedish construction process of condominiums/rental apartments.The purpose of this study is to describe and understand how the work with Knowledge Management (KM) is performed in the Swedish construction process of condominiums/rental apartments. This in order to develop a conceptual framework of the influence of culture, collaboration and trust on KM (tacit knowledge, explicit knowledge, the KM process, and knowledge sharing and transfer) in the Swedish construction process of condominiums/rental apartments. The theoretical framework consists of classical KM theories in order to develop a knowledge base for the concept of KM. The classical KM theories are presented together with more recent theories concerning KM. Influencing factors such as culture, collaboration and trust are added to the theoretical framework in relation to KM in order to present the human factors of KM (non-IT KM). There has also been a focus on knowledge sharing and transfer since they are of great importance in the specific research context of this study. The findings was that culture, collaboration and trust have a strong impact on the way the different parties work with KM. Therefore, these concepts are found to be essential for enabling an effective KM, especially knowledge sharing and transfer. The parties do not have an extensive formal KM strategy that includes technological parts. Nor do they have a formal strategy that deals with culture, collaboration and trust and therefore they rely on the relationships and the human factor.