A new police station needed to be planned in the small town of Mössingen at the foot of the Swabian Jura. The available plot was a former agricultural property at the junction between two access roads. The plot on the town’s northern perimeter was relatively large, but its usability was significantly limited by a mighty walnut tree. The surrounding situation was dominated by transport and was largely heterogeneous and without character. It called for urban-planning order. The two-storey police station divides the plot into a small public forecourt at the junction and a rear-side police yard beneath the walnut tree. Its slightly projecting upper floor marks the entrance and address. The elongated, single-storey garage building is directly connected to the main volume and contributes to the location’s urban-spatial framework. A bus stop was integrated into the ensemble and strengthens the public nature of the small forecourt. The police station is organised around a central atrium with an open staircase that receives abundant natural light from above. The limited budget demanded a simple, carefully chosen materialisation. Charcoal-grey sgraffito covers the core-insulated masonry structure. The apertures are framed by precise prefabricated, white-concrete elements, into which the windows were inserted with their powerful oak wood frames.