TS EN 15221-6

TS EN 15221-6 is the part of the facility management series that brings area and space measurement into a common framework. It addresses the terminology and measuring logic needed to describe building areas consistently for planning, design, space management, financial assessment, and benchmarking. The standard also applies to buildings that are already in use, owned or leased, as well as to buildings still in planning or development.

How area and space terms are organised

In facility management, area measurement is more than simple square-metre counting. Concepts such as net area, gross area, circulation space, usable space, and volume must be understood consistently if results are to be compared across teams, sites, or contracts. This standard provides clear terms and definitions for measuring horizontal areas and volumes within buildings, helping different stakeholders work from the same spatial data. In general technical practice, that kind of consistency is essential for occupancy analysis, space efficiency studies, and cost comparisons.

Why the building-inside and building-outside distinction matters

The scope includes both areas inside buildings and areas outside buildings. That distinction matters because internal spaces and external spaces often serve different planning, maintenance, leasing, and reporting purposes. The standard offers a framework that is independent of function, so the same measurement logic can be applied across offices, industrial premises, storage facilities, and mixed-use environments. This makes spatial data more comparable across different facility types.

By establishing a common basis for measurement, the document supports operational planning and financial evaluation in facility management. From a general technical perspective, precise and shared area definitions are important for portfolio control, leasing arrangements, service allocation, and benchmarking exercises.