Flat definition
Approved document B, Fire Safety, Volume 2, Buildings other than dwellinghouses (2019 edition), defines a flat as:
'A separate and self-contained premises constructed or adapted for use for residential purposes and forming part of a building from some other part of which it is divided horizontally.'
The previous edition of approved document b also suggested that this '...includes live/work units, i.e. a flat intended to serve as a workplace for its occupants and for persons who do not live on the premises.'
The English Housing Survey Housing Stock Report, 2014-15, prepared by the Department of Communities and Local Government, gives the following additional categories:
- Converted flat: A flat resulting from the conversion of a house or former non-residential building. Includes buildings converted into a flat plus commercial premises (such as corner shops).
- Purpose built flat, low rise: A flat in a purpose built block less than six storeys high. Includes cases where there is only one flat with independent access in a building which is also used for non-domestic purposes.
- Purpose built flat, high rise: A flat in a purpose built block of at least six storeys high.
The Housing Grants, Construction and Regeneration Act 1996 (HGRA - also known as the Construction Act) suggests that “flat” means: ‘…a dwelling which is a separate set of premises, whether or not on the same floor, divided horizontally from some other part of the building.’
In North America, the term 'condominium' refers to residential blocks in which the residents own their individual flats and the common areas are owned jointly and managed collectively. Condominiums are distinguished from apartments, in that the flats are owned rather than leased.
[edit] Related articles on Designing Buildings Wiki
- Apartment.
- Approved documents.
- Bungalow.
- Condominium.
- Corridor access.
- Curtilage.
- Domestic building.
- Duplex.
- Dwellinghouse.
- Household.
- Housing stock / building stock.
- Main door flat.
- Maisonette.
- Penthouse.
- Residential definition.
- Room for residential purposes.
- Sheltered housing definition.
- Shop definition.
- Studio flat.
- Terraced house.
- Types of building.
- Types of dwelling.
- Use class.
- Workplace definition.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Construction Management, 8 July
NEETs crisis drives interest in trades, but apprenticeships barriers remain.
Passive fire protection webinar
MEP services penetration seals.
Where its at podcast (and video) - The role of the Architectural Technologist as an Expert Witness.
More than 200 remarkable buildings added to SAVE’s Buildings at Risk register.
Government scraps pre-application consultation for Nationally Significant Infrastructure Projects.
Historic England and infrastructure
New projects offer opportunities for the historic environment and local communities.
Construction Management, 2 July
Construction deaths halve in two years.
Green Book changes to drive investment in all parts of UK.
Minimum energy efficiency standards (MEES)
CIAT briefing on response to consultations for privately rented non-domestic properties.
Connect, collaborate, shape the future
Registration now live for UK Construction Week Birmingham.
CIOB announces Saul Humphrey FCIOB as new President for 26/27 term.
A quick, simple, and zero-bills solution to prevent overheating.

















