Kielwein Holzbau is a German company serving the German market, operating under Kielwein Holzbau GmbH and active since 1968. The company focuses on timber-frame construction, prefabricated wooden elements and custom house projects.

Its services are centred on carpentry, prefabricated timber elements, roof and wall construction, house extensions and full timber-building projects. It is especially relevant for people who want a home with a warmer timber character and a stronger focus on efficient, lower-impact construction.