© Crown copyright and database rights 2026 Ordnance Survey 0100031673

OS NGD Buildings contains features for permanent roofed constructions in Great Britain, usually with walls. It is comprised of three Feature Types: Building Line, Building Part, and Building:

- Building: provides building footprint geometry, access location a descriptive value for an understanding of what the building feature represents (e.g. residential/commercial, type of business use, whether the building is detached, terraced etc.)

- Building Line: provides line geometry and represents a wall between two buildings, building internal divisions, or an overhanging building edge.

- Building Part: A polygon feature representing either a complete separate building, or part of a larger building where internal divisions exist from ground to roof level which can be identified externally (e.g. multistorey car park).

OS NGD Buildings provides unique identifiers Ordnance Survey Identifier (OSID) and Topographical Identifier (TOID) for data linking and analysis.