The work attempts to present the ecological certification systems used in our country. The most popular systems were compared, i.e. BREEAM and LEED and the latest WELL system. Against this background, the latest Polish comprehensive and multi-criteria ecological certification system for buildings, Planet Friendly, was also presented, which is increasingly gaining ground on our Polish market. Save The Planet Research and Development Center awards certificates at four levels: Understanding, Respectful, Caring and Loving. The result depends on the number of points awarded on the basis of various criteria, including: management of sustainable development, care for the well-being of the natural environment, including flora and fauna, employee well-being and quality of solutions used in the building or space. The certification process is supervised by professional auditors and the scientific council of the Save The Planet Research and Development Center, composed of experienced scientists, including: in the fields of construction, architecture, management and economics.