To begin with, a white tub consists of a foundation slab and cast-in-place concrete walls, prefabricated walls or semi-finished concrete parts. This paper will look at cast-in-place concrete walls and semi-finished concrete parts. The latter is also known as Elementwand, Hohlwand or Doppelwand in German. The impact of water intensity on a building determines the constructive requirements. Under the aspect that water can be found in the ground, which causes a hydrostatic pressure on building elements, it is necessary to consider the height of water pressure. Furthermore, the required water tightness of the cellar determines the concrete quality, the quantity of reinforcement as well as the minimum thickness of the wall. In addition to that, other constructive requirements should be taken into consideration. Both, the cast-in-place concrete and the double wall building technique cannot be found in ÖNORM standards but are regulated in guidelines. The ÖBV Richtlinie - Wasserundurchlässige Betonbauwerke - Weiße Wannen describes the cast-in-place concrete construction type and is the basis for the VÖB Richtlinie - Wasserundurchlässige Betonbauwerke in Fertigteilbauweise. While cast-in-place concrete walls are formed, reinforced and concreted at the building site, the double walls are produced in a precast concrete factory. After moving the double wall elements from the lorry to the installation location, the first step is to damp proof the heading joints followed by pouring concrete into the gap between the prefabricated slabs. In contrast, if cast-in-place concrete walls are built, merely the construction joints have to be sealed. These joints should be arranged at intervals of 10 m in order to avoid cracking in newly poured concrete. This results in half as much sealed joints when using the cast-in-place concrete wall system compared to the double wall technique. Therefore, the quality of the joint sealing is of utmost importance when using double walls. In order to conduct a comparison between the direct costs of these two building techniques, an investigation of performance factors and material costs has been carried out. The performance factors were obtained from representatives of construction firms. These specifications were compared with data from relevant literature. The material costs were recalled from construction firms and from open price lists, which included customary discounts that were also considered. Based on the mentioned guidelines the direct costs for wall thicknesses from 25 to 50 cm were calculated. Furthermore, various wall heights, water pressures, requirement categories, types of sealing of heading joints and load cases were examined. The results of this comprehensive parameter study are shown in diagrams.