Over the next few years, major investments in healthcare buildings is to be performed. Most surgical theaters are in need of technological upgrades as the technology is outdated. In most cases not only a refurbishment is performed but also an expansion. The basis for expansion, is due to a large increased number of patients, but also to the complexity of the refitment. Partly it's because evacuations are difficult to implement and the disturbance that occurs in conjunction with the refitment. Löwenströmska hospital undergoing a technical upgrad. The hospital has a relatively small operation department, and during the summer the business may be closed. Rebuilding in stages is done to rehabilitate the department technically. Work is underway for four summers and covers a total refurbishment of the premises. Although shutdown is possible, the project is still complex. The purpose of this study is to examine whether other construction methods than rebuilding had been of value to the surgical department at Löwenströmska hospital. The goal is to overlook the efficiency of production, reduce the complexity added through the conversion, and compare the methods economically. Methods that have been examined are a new construction of a department, new construction with partial conversion and modules. The work is also carried out to facilitate the choice of method for future projects. The basis of the work lies in discussions and interviews with persons involved in the project. And review of blueprints and technical specifications . The conclusion of this study is that depending on the chosen construction method various advantages is gained. Depending on the circumstances and opportunities provided , all results provide beneficial solutions. Therefore, all investigated methods individually reviewed for similar projects.