Due to climate change, many towns will face more extreme events like heat waves and heavy rainfall that will affect urban populations. Green roofs and facades offer a promising green infrastructure system to help cities adapt by creating beneficial microclimate. They reduce excessive sunlight, lower temperatures, minimize air and noise pollution and absorb storm water. Urban planners are using more green roofs because European social climate funds make them more affordable despite some limitations such as: maintenance challenges or scalability. The environmental effectiveness of extensive green roofs and facades is presented in temperate climate zone, specifically in Kosice, on building at the Technical University of Kosice TUKE highlighting their energy efficiency and contribution to building sustainability Extensive green roofs at main building of TUKE have a shallow soil substrate with low – growing plants like sedums and mosses. The green facade is installed on the CO storage facility and measures about 4 by 4 m. It uses a hydroponic system for plant growth. The extensive green roof and facade also will serve research and educational purposes for the general public to get to know and experience its environmental and aesthetic benefits firsthand.