Kükelhaus was acutely concerned with questions of construction and living facilities. Since the early 1970s he has substantially criticized the tendencies of the architecture of those days, which was in great parts hostile to life, and developed the baselines of an organological construction, i.e. construction orientated towards the human senses and the human organism. For Kükelhaus building and designing that centered on human needs and measures was a concern throughout his life.
"With his own intellectual contribution to architecture Kükelhaus demonstrated that architecture can be more individual, tolerant, natural, thoughtful meaningful and appealing to the senses." (Hartmut Niederwöhrmeier)