Building height
For the purposes of Approved Document B Volumes 1 and 2.
- The height of a building is measured as shown in Appendix D, Diagram D4.
- The height of the floor of the top storey above ground level is measured as shown in Appendix D, Diagram D6.
Ref Approved document B, Fire Safety, Volume 2, Buildings other than dwellinghouses (2019 edition).
At 828 m and 163 floors, Burj Khalifa in Dubai, UAE has been the world’s tallest building since 2010. For more information, see Tallest buildings in the world.
Classifications of building height include:
- Low rise buildings.
- Mid-rise buildings.
- High rise buildings.
- Skyscrapers.
- Supertall buildings.
- Megatall buildings.
- Groundscrapers.
- Super-slender buildings.
- Buildings of a great height.
- Buildings of a very great height.
- Multi-storey buildings.
- Small building.
- Tall buildings.
See also: Height.
[edit] Related articles on Designing Buildings
- Approved documents.
- Building Regulations.
- Datum.
- Floor area.
- Gross floor area.
- Gross internal area.
- High-rise building.
- Height.
- International Property Measurement Standards.
- Medium-rise building.
- Net internal area NIA.
- Ordnance Datum.
- Storey.
- Tall building.
- Tallest buildings in the world.
- Total useful floor area.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
New guidance for professional practice, cultural change and regulation in social housing.
The heritage of nuclear and conventional power stations.
New measures to stop people being ripped off
Government to protect families from cowboy builders and aggressive bailiffs.
New Futurebuild showcase brings an innovation-first approach.
National Planning Policy Framework
Understanding the 2026 changes.
ECA's public affairs priorities
Member consultation opens to shape priorities for 2027 to 2030.
Dutyholder responsibilities from 1 July 2026.
Where performance meets practice
The Building Envelope Stage at UKCW Birmingham.
CIAT publishes briefing on planning reforms.
Leaders in Learning for Practice Network
Call for conservation leaders in learning to register interest in new network.
The importance of early engagement
Construction lessons from the Trillium HealthWorks Experience Centre.
Mayors are to be given planning call in powers
Mayors across England will be able to make the most important planning decisions.



















