Retrospective application for conversion of existing buildings to form 1 no. new dwelling together with basement extension, 1 new outbuilding, associated improvements/alterations including attached annexe accommodation and other associated development including replacement of barns existing brick and timber structures to allow a more efficient form of residential construction and minor fenestration changes to proposed barn conversion design approved under extant planning permission 17/01406/FUL.

Development to provide a total of 326 self-contained residential units comprising; phased construction of seven blocks of flats (ranging from two to six-storeys); two two-storey detached dwellinghouses (following demolition of existing gatehouse); and a terrace of two-storey dwellinghouses in the grounds of Twyford Abbey (all Use Class C3); conversion of Twyford Abbey (Grade II Listed) into flats (Use Class C3) and provision of residents lounge; demolition of workshop attached to the Grade II listed walled garden and replacement with a single storey dwellinghouse (Use Class C3); facilitated by repair; refurbishment; infill and rooftop extensions; demolition of post-war extensions and other pre-war structures within grounds, excluding the cottage; retention and repair of the Grade II listed walled garden and attached cottage to provide ancillary facilities management accommodation and residents facilities; comprehensive landscaping works including removal and works to trees and groups of trees protected by a Tree Preservation Order; provision of permissive publicly accessible open space and grow gardens; provision of gated cycle and pedestrian access onto North Circular (A406) and new access onto Twyford Abbey Road; provision of hardstanding parking areas; ecological enhancement works; and other associated constructions works including installation of boundary treatment

Conversion of Duke's School to residential apartments (27no.), including demolition and rebuild of the modern rear extension, development of specialist elderly living accommodation (49no. apartments) and residential dwellings (22no.), creation of a landscaped open area, all ancillary works including car parking, access and drainage.