Home Contact imprint Sitemap profile Energy advice Building surveyor architecture Home buying advice Four important services from a single source Energy efficiency expert, certified passive house planner Expert for damage to buildings (TÜV) Architect AKNW House purchase advice, quality control during construction Dipl.-Ing. Karl-Heinz Groß - your building expert for Cologne and Bonn | Telephone 0 22 22 - 9 95 69 98 | info@gross-sv.de