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 the existing property into four self-contained residential units, with associated cycle storage, refuse storage facilities and amenity space; alteration of roof from hip to gable end; rear roof extension incorporating two Juliet balconies and installation of three roof lights to front roof slope; single storey side/rear (wraparound) extension (following demolition of existing outbuildings and front addition); first floor side/rear extension; alteration to side and rear fenestration; erection of boundary wall and fences alteration to front of property include involving hard and soft landscaping; alterations to the roof of front projecting element and partial demolition of single story front projection and chimney stack