Doors and their surroundings are an important part in all kinds of buildings. Projecting of door is a natural part of the construction process and requires a great deal of collaboration between several participants to meet the requirements for function, safety and the environment together.This project aims to examine the requirements for the projecting of door environments and the most common mistakes that exist during the different stages of the construction process. Furthermore, a process of work is developed which improves workflow and minimizes mistakes, from purchasing consultant to handover.To achieve these, the following issues have been addressed: • Who can perform door planning in the best possible way? • Who should be responsible for door environments during different parts of the construction process? • What are the requirements for projecting of door environments? • How can the cooperation be done in the best between the different parties? The main part of this work has been interviews and meetings with people from different areas of work that affect door environments in their daily work. In addition to interviews, a fair visit to Nordbygg 2018 has been made to get a better view of the problems regarding door environments for the suppliers. A visit to the new Karolinska Hospital area was also done, where the most common mistakes and shortcomings were identified for an ongoing project.Respondents had mixed thoughts and opinions, but it appears from interviews that door environments are a complex part that is difficult to establish. There are several reasons, such as insufficient knowledge of the whole work, as many are limited in their field of work. Lack of knowledge leads to project missions, which in turn leads to surprises and slowdowns further in the process. The results of the study have shown that communication and coordination between different participants throughout the work process should be improved. It also appears that claims from the client should be clearer at the beginning of the projecting phase.The potential for developing door projecting based on occupational safety, considerations, IN3PRENÖR AB is recommended to clarify accounting tools and working methods as well as documents and supporting documents as early as possible during the work process to create a workflow and support for future work. Keyword: Door, door environment, door projecting, door production, database, workflow