The Town and Country Planning (General Permitted Development) (England) Order 2015

[F1Permitted developmentE+W
This section has no associated Explanatory Memorandum

AD.(1) Development consisting of works for the construction of new dwellinghouses immediately above the topmost storey on a detached building in use as a single dwellinghouse within the meaning of Class C3 of the Schedule to the Use Classes Order, where the development comprises—

(a)up to two additional storeys, in the case of an existing dwellinghouse consisting of two or more storeys;

(b)one additional storey, in the case of an existing dwellinghouse consisting of one storey,

together with any development under sub‑paragraph (2).

(2) Development consisting of any or all—

(a)engineering operations reasonably necessary to construct the additional storeys and new dwellinghouses;

(b)works for the construction of appropriate and safe access to and egress from the new and existing dwellinghouses, including means of escape from fire, via additional external doors or external staircases;

(c)works for the construction of storage, waste or other ancillary facilities reasonably necessary to support the new dwellinghouses.]