Single-storey building definition
Approved document B, Fire Safety, Volume 2, Buildings other than dwellinghouses, defines a single-storey building as:
'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’ includes:
- 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.
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