Step by step to an accessibility concept! Safely demonstrate accessibility in publicly accessible buildings. The manual "Accessibility Concept" for the first time explains the contents and requirements for concepts and proofs of accessibility in new buildings and existing structures. It facilitates entry into this complex topic and provides the necessary expertise to consider accessibility at an early stage. Because accessibility must already be demonstrated during the approval planning phase of the construction project. A coherent accessibility concept clearly and unequivocally presents the measures for accessibility in plans and construction documents. It simplifies the approval planning process and assists in early planning and coordination with all parties involved: from the client to architects and specialist planners, as well as approval authorities and "non-construction" disability representatives, down to construction companies.