ENPost-war concrete architecture is a valuable part of the 20th-century heritage spread worldwide with specific preservation challenges. This paper analyses three possible preservation scenarios: conservation, comprehensive upgrade, and adaptive reuse based on a broad legacy of post-war concrete architecture in Lithuania and the sustainability aspect. Even though several significant concrete objects are listed, they are protected very formally, and no comprehensive preservation is applied. Keywords: Adaptive reuse, comprehensive upgrade, concrete architecture, conservation, cultural value. [From the publication]