Recently, Denmark has faced severe damages to many houses due to cloudbursts. For planners to overview which low-lying residential areas that are in highest risk of floods, landscape sinks have been extracted from a DEM. Next, the buildings’ base levels within the sinks, the sinks’ volumes up to these levels, and the sinks’ contributing catchment areas have been derived. The results show the critical precipitation amounts in mm/hour that will cause a flood problem to the individual property.