As the population increases, Swedish cities are becoming more urbanized. Consequently, people’s well-being deteriorates, and global warming has become reality. Buildings are replacing green spaces, necessitating the implementation of new methods to reintroduce greenery into urban areas. This study was conducted to investigate how a wall of an existing building in Halmstad, Sweden, is affected by supporting a living wall concerning load-bearing capacity, moisture, energy performance and economics. The methodology of this qualitative study includes literature review, interviews, and calculations for moisture, heat, and load-bearing capacity. The study found that living walls serve as additional insulation and that moisture does not affect the existing wall due to a vapor barrier. Also that the calculated wall withstands the weight of the living wall. Installation and maintenance costs can vary widely, and there is a wide range of plant species available. It's important to find plants that can withstand the climate for the specific wall. A broader selection of plants is available among those that wither in a beautiful way and are thus not evergreen. After interviews, it can be noted that living walls require minimal maintenance and thus maintenance costs are constant. Over time, some costs will be reduced as cooling and heating expenses decrease since the living wall acts as additional insulation.