Developing and preserving biotope networks is a meaningful and common strategy in nature conservation and biodiversity maintenance. However, urban design and open space management usually stem from different disciplines that do not work closely together in practice. Our case study presents a methodology for delineating an urban, dry habitat biotope network and demonstrates how it fits into a statewide open space biotope network within Baden-Württemberg (FRG). As a result, the study suggests interlinkage points connecting the urban- and the open-space network.