Green roofs generate profits based on different possible ecosystem services that the green roof provide. Ecological and cultural services such as air purification and recreation can increase the value of attraction on the property of potential homeowners. In addition to increased attractiveness it can also result in reducing energy costs and energy use. Green roofs can have a cooling effect on the property, which affects heating costs. A green roof can also interact with solar cells for local energy production. The possibility of developing a system for a small-scale hydropower plant converting rain and snow into energy could also be interesting to investigate. Green roofs can also be a way of meeting the city´s green space factor requirements.