Single-storey building definition
Approved document B, Fire Safety, Volume 2, Buildings other than dwellinghouses (2019 edition), defines a single-storey building as:
'A building that consists of a ground storey only. Basements are not counted as storeys in a building (see Appendix D). A separated part that consists of a ground storey only, with a roof to which access is only provided for repair or maintenance, may be treated as a single storey building.'
Where a storey includes any of the following:
NOTE: The building is regarded as a multi-storey building if both of the following apply. |
The previous edition of the approved document gave a slightly different definition:
'A building consisting of a ground storey only. (A separated part which consists of a ground storey only, with a roof to which access is only provided for repair or maintenance…) Basements are not included in counting the number of storeys in a building.'
Where a ‘storey’ included:
- Any gallery if its area is more than half that of the space into which it projects; and
- A roof, unless it is accessible only for maintenance and repair.
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Biodiversity and the built environment digital series
The nature of building, with CIOB and CWP.
A call for prevention and sensitive re-use.
Risks to the long-term effectiveness of the BNG scheme
National Audit Office publish review of Biodiversity Net Gain.
The CIAT principal designer register
Providing assurance and verification of the capability and competence of registered ATs.
Building Safety recommendations and Northern Ireland
The NI roadmap to improving safety in high rise residential.
BSA residential sector competence standards guidance
BSAS 01:2024 Organisational Capability Management System Standard - Competence Assurance.
Specifying rendered external wall insulation for fire safety
How to interrogate the evidence provided to the specifier.
The benefits of writing articles for your organisation
How to create a profile for your organisation and publish for free.
No Falls Week. The importance of safe working at height
What to expect and what is on offer to avoid accidents.
Scottish Government action to reach net-zero targets
Retrofit expert group highlight critical actions needed.
A forward thinking, inclusive global community of members.
From engineered product life-spans, to their extension.
Circular economy in the built environment
A brief description from 2021. Where are we now?
CLC publishes domestic retrofit competency framework
Roadmap of Skills for net zero.
Understanding is key to conservation.
Open industry engagement survey seeks responses
Institutions and the importance of engagement.