Green roofs add a layer to a property which increases thermal insulation. Allowing the building to stay at particular temperatures  throughout the year, effectively reducing energy costs. 

Green roofs provide natural habitat for bird, plant and insect life. 

Green roofs can make up for the loss of previous greener landscapes,  and help to make the overall look of a building more attractive and  blend more easily into a surrounding environment.                     

Green roofs help to reduce noise, absorbing sound as opposed to reflecting it, like most conventional roofs. The soft layer of sedum blanket growing on a green roof also improves the buildings sound insulation.