The Hausbaumhaus is one of the oldest largely preserved merchants' houses in Rostock and the surrounding area from the time of the Hanseatic League.
The late Gothic building was erected in 1490. It is the only preserved house in Rostock that has a house tree as an architectural feature. The trunk, made of oak, rests on a huge erratic block in the basement and stands in the center of the house. The high building form with the narrow facade facing the street was typical for this era. Equally characteristic of the building are the closed brick facade and the fascia staggered gable. Since April 15, 2014, guests are invited to experience the special architecture of the historic building around the house tree. The tour is available free of charge.
Since the early 80s, it was the house of architects. Today, the house is owned by the German Foundation for Monument Protection.