It is important that new houses do not become obsolete before their constructional life expires, and this should inform the size and layout of their internal spaces from the outset. While the market at the time of initial sale will clearly be the main determinant of the acceptability of space provision, it is prudent nonetheless to refer to other, relevant guidelines. 

The document ‘Technical housing standards – nationally described space standard’ stipulates that developers must show on plans that bedroom furniture can be accommodated within the design. This standard deals with internal space within new dwellings and is suitable for application across all tenures. It sets out requirements for the Gross Internal (floor) Area of new dwellings at a defined level of occupancy as well as floor areas and dimensions for key parts of the home – notably bedrooms, storage and floor-to-ceiling heights.