Brief definition
Cost group 500 (KG 500) under DIN 276 comprises external works — including terrain, outdoor access, planting, and open-space-related building works, insofar as not assigned to other groups.
Relevance for quantity take-off and BoQ
Site plans and external area drawings provide areas and lengths (paths, surfaces, fencing). Calibrated scales and documented geometry sources are decisive for BoQ items.
Normraum relevance
External works come from the site plan and the landscape plan; Normraum processes building floor plans, not site plans, and delivers no quantities for KG 500. The link is the boundary: what stands in the room book as a room with an area under DIN 277 belongs to the building – what lies outside the external wall does not.