The aim is to design a building that provides mainly housing space, but also common areas and commercial spaces. While the design can be freely developed for the most part, there are some specifications that must be taken into account.
_ Mix of flats
The design project must provide for an essentially high utilisation factor, and the ratio between GFA and NFA should be no lower than 0.65 – 0.75.
The design must permit the following mix of flats
Type, ideal flat size, share of new flats
Type A (1 room) 36-38m2 20%
Type B (2 rooms) 45-50 m2 20%
Type C (3 rooms) 70-80 m2 30%
Type D (4 rooms) 85-95 m2 25% -max. 30%
Type E (5 rooms) 100-120 m2 max. 5%
_ Open-air spaces
Each residential unit must be planned with a corresponding open-air space, with a minimum width of no less than 1.80m (2.20m would be ideal).
_ Commercial spaces
Commercial spaces are generally welcome. However, they should only be planned for the ground-level zone and only if they make sense. Their use must be adapted to the needs of the immediate neighbourhood.
_ Common areas
The common areas and community facilities should have a positive impact on the social cohesion, mix and inclusion of both the building occupants and the general public. The design must therefore provide for sufficient common areas (which may also be located in open-air spaces).
In addition, planning must include a common laundry room. Its size must be commensurate with the number of flats. For each unit, an additional storeroom outside the flat must be provided.
_ Parking spaces
Both the existing parking space requirements and the parking needs resulting from the new building must be accommodated on the property. If an underground car park is planned, access must be ensured by ramps and not by means of car parking lifts. In addition, about 5% of the parking spaces must be accessible to persons with disabilities.
_ Energy requirements
The aim is to construct the building as a zero energy house; the design must be developed accordingly. Moreover, category A (nearly zero-energy building) under the applicable Austrian standard ÖNORM H 5055 on energy certification of buildings must be achieved as a minimum requirement.
_ Green façade
At least 25% of the street frontage must be planted with vegetation. On the courtyard side, green cover is also welcome, but not required. With a view to efficient maintenance, ground-based and easily accessible systems are preferable. Vegetation that is only accessible through individual flats should be avoided.