architectural, engineering and planning services - fraunhofer igb stuttgart - planning building 70-00201-2110-a./ implementation of construction planning services for planning building - new construction bt q and modernization bt b, total costs kg 200-700 (without kg600) approx. 45,963. 000 euros net according to ii.2.4). fixed price contract! fee according to hoai according to the model contracts of rbbau. gradual commissioning of the service phases 224858 hoai in accordance with the rbbau model contracts. commissioning lph 5-8 at the earliest upon receipt of the approved application and construction documents. fee zone (§35 hoai): 3 and 4, fee rate (§35 hoai): minimum rate. amount of additional costs: according to the latest version of the rift association. the conversion surcharge is (%): 25. the building fabric to be processed is remunerated as follows: the building fabric to be processed is already taken into account in the form of an increased conversion surcharge and is thus compensated.