All halls and foyers, as well as the roof garden, are easily accessible via ramps or elevators for people with limited mobility. The elevators have been designed to be extra spacious – as have the disabled toilets throughout the CCH.
Information on accessibility can be found here: https://www.cch.de/besuchen/barrierefreiheit
https://www.hamburg-tourism.de/barrierefreies-reisen/