Excavation of basement level beneath footprint of existing house with walk on rooflights; Rebuilding of bathroom extension at lower ground floor; Erection of extension at ground floor level over octagonal wing and creation of new parapet; Erection of infill extension on northeast elevation; Remodelling of bay on southeast elevation at lower ground floor level; Erection of replacement dormer; Demolition of existing retaining walls on south east elevation and eastern lightwell and construction of new metal escape stairs in these location; Replacement of windows; Rationalisation of drainage, repair of stucco render, repair/ refurbishment and part replacement of existing roof, refurbishment/ replacement of existing chimney and pots; Installation of Plant Machinery; Erection of bin and bike store to front garden; and associated external alterations.

Internal and external alterations, including removal of modern fixtures and fittings and reinstatement of lost historic fabric, reconfiguration and replacement of modern circulation elements, some minor alterations to modernised plan form and replacement services. Remodelling of fourth floor mansard, replacement of modern skylights at ground. Removal of access ladder on the front of the mansard and railings on the party wall with 37. Continuation of internal staircase to provide maintenance access to the roof vis a new sliding access hatch skylight. Replacement timber doors to the house at ground and at basement level and to the vaults; reinstatement of Portland stone to the entrance steps, external entrance and vault doors to ground and lower ground. (Linked to 21/06872/FULL)