In the face of an increasing demand for energy in the construction industry, it is necessary to change the designers’ thinking about architecture. Modern buildings should be objects that use modern technologies and natural materials, limiting the use of raw materials such as water and energy or waste production. Green buildings are a response not only to reducing energy consumption and building with respect to environment and nature, but also the desire of people in big cities to live in the presence of natural greenery. With the growing popularity of ecological construction, there was a need to verify it. The article deals with the certification of buildings using the international LEED, BREEAM certification systems, while using greenery in modern architecture on the example of the city of Poznan.