 The conditions required the houses to have at least three residential rooms, to be made of local building materials, and not to cost more than 4000 Mark for a single occupancy house or 7200 Mark for a dual occupancy house.Moreover, the architects were required to design an interior which cost less than 1000 Mark per residence.The buildings were designed by the local architects Ludwig Mahr, Georg Metzendorf, Josef Rings, Heinrich Walbe, Arthur Wienkoop and Joseph Maria Olbrich.