The Green Core House is a construction concept with low environmental impact, having as main central element a greenhouse. One of the main purposes of this house is to bring man closer to nature and show that there are other ways to define the word ”home”. The greenhouse has the innovative role to use the biomass energy plants provide to save energy. Although it is the central piece, the greenhouse is not the most innovative part of the Green Core House, but the whole building ensemble because it integrates many other sustainable systems as "waste purification systems", "transparent photovoltaic panels" or "double skin façades".  The Green Core House is a dome shaped building because it is ergonomic and it allows the use of the entire building area at full capacity and also eliminates thermal bridges that appear at corners. This is one reason why the greenhouse is centrally arranged. In addition, the thermal energy released by the plants passes through the glass walls towards the rest of the building, and then to the external environment, using straw bale walls that allow the partial transfer of humidity and heat.  The greenhouse has multiple roles, from both physically and mentally points of view, such as using a ventilation system, it helps adjusting the temperature inside the building due to the biomass from inside the greenhouse, where the temperature is higher due to natural processes of plants, it reduce stress, due to the natural green plants inside the house, it reduce noise and filters dust, it increases productivity due to the natural environment - scientific studies have shown a growth rate of 12% in work productivity, and it improves the welfare of the people living or working in the house due to better air quality and atmospheric humidity.  Straw bales was chosen as main filling material for the solid walls, due to several reasons: it is a natural material, it is easily produced, energy-efficient, available to anyone, and at the same time it is perfect for GF + 1F type buildings because of its properties.  Choosing straw bales as wall fillers comes as a consequence of the structure type - a frame structure that allows using a large variety of construction materials for the walls and floors. Another advantage in using this type of structure is the fact that it ensures functional flexibility, as the separation walls position can be changed anytime.  Daytime lighting is easily accomplished due to the large openings of the house which are covered with "brise-soleil" - elements introduced inside the double façade in order to increase the space inside the house, which make it easy to adjust the light intensity in the house and greenhouse.