Due to climate change, extreme weather and heatwaves will become more frequent inSweden. Heatwaves have been proven all around the world to cause increased sickness and death rates in populations. Even in the Nordic countries heatwaves can cause negative health effects and sickness already in the current climate. Because of this, it´s important to know what building companies are doing to prevent overheating in their buildings and how they adapt their buildings for a changed future climate. The purpose of this study was to examine how Swedish building companies adapt their buildings to prevent future overheating and what method they are using to do so. The result showed that most of the interviewed companies prioritized adapting their buildings to prevent overheating. Companies which did not prioritize this issue argued that they follow customer demands or that they have not perceived overheating as a problem. There were no significant differences between companies in southern and northern Sweden in which methods the companies decide to use to lower temperatures inside buildings. To avoid risks related to overheated apartments in the future every company in the building sector needs to prioritize these problems and government agencies needs to construct stricter laws regarding indoor temperatures. Thus, the companies that are working based on customer request would also need to adapt to a changed future climate.