Deconversion of the existing property from 3no. self-contained flats into a single family dwellinghouse; erection of a front and rear roof extension, including installation of 3no. rooflights on top of the main flat roof, 3no. rooflights in the roofslopes to the front elevation, and a rear dormer window; erection of a rear extension at second floor level, over part of the existing back addition; repositioning and installation of 3no. new windows following the removal and infilling of existing to the side elevation, installation of new French doors with side panels and a Juliette balcony following the removal of existing window to the rear elevation of first floor back addition.

Alterations to the existing front roof extension with the widening of the existing dormer window; erection of a single storey rear extension, to the side of the existing back addition; and installation of bi-folding doors to replace existing French doors to the rear elevation at ground floor level.

Erection of a rear extension at first floor level, on top of the existing two storey back addition; erection of a single storey rear extension to the side of existing back addition, following the demolition of external wc at lower ground floor level; erection of 2no. new dormer windows following the removal of an existing enlarged dormer window in the front roofslope; alterations to the rear elevation of rear roof extension to include erection of 1no. dormer window, and 1no. dormer window with a balustrade following the removal of 4no. existing windows.

Erection of a rear roof extension; erection of a single storey rear extension, to the side and rear of existing back addition; installation of 3no. rooflights in the front roofslope; installation of dormer French doors to the rear elevation at third floor level, to provide access to the proposed roof terrace; erection of glass screening on top of part the flat roof of second floor back addition, in connection with its use as a roof terrace; alterations to fenestration and openings and replacement of all existing windows; formation of a courtyard between the main building and proposed single storey rear extension; excavation of part of the front, side and rear gardens to form lightwells, in connection with the enlargement of existing basement.

Demolition of the single storey back addition and rear outbuildings attached to the rear of the main building; erection of side and rear extensions at lower ground, upper ground and first floor level, erection of a rear roof extension to replace the existing dormer window, excavation beneath the main building in connection with the creation of a new basement and the formation of a roof terrace at upper ground floor level to the main building; change of use of the main building from office (Class E) into 2 x two bedroom self-contained flats; erection of a part one storey plus-basement single family dwellinghouse in the rear garden; erection of a new boundary wall with three new entrances to the side elevation; associated landscaping and external alterations.

Erection of a front roof extension with 3no dormer windows involving an increase in the ridge height; erection of rear extensions at ground, first and second floor level; installation of a new rooflight above the main flat roof at roof level and above the roof of first floor rear back addition; installation of French doors with a Juliet balcony to replace the existing window in the rear roofslope; infilling of 2no windows and installation of a new window to the side of rear back addition at first floor level; alterations to the roof of single storey back addition to include the installation of new rooflights; excavation of the front and rear garden to form lightwells in connection with the enlargement of the existing basement; replacement of the existing windows with new timber framed double glazed windows to the front and rear elevation.

Erection of a rear extension at second floor level over part of the existing back addition, including the installation of 1no. sash window in the rear elevation and 1no. dormer sash window in the side elevation with obscured glass to ensure privacy; installation of a new rooflight over main flat roof at roof level; and installation of 2no. rooflights in the front roofslope to replace existing.

Erection of an additional floor at roof level to replace the existing roof together with 4no dormer windows fronting Quarrendon Street elevation and 2no rooflight above the main flat roof at roof level of the new extension.

Removal of part of the pitched roof to form a new flat roof, and erection of 1.7m high obscure glazed screening on top of the proposed flat roof of existing first floor floor back addition, in connection with its use as a roof terrace; installation of a new dormer door following the removal of existing dormer window to the rear elevation of rear roof extension, to provide access to the proposed roof terrace.

Erection of a rear extension at second floor level over part of the existing back addition; erection of rear extensions at ground and first floor level and erection of a single storey rear extension to the side of the extended back addition; excavation of the front and rear garden to form lightwells in connection with the enlargement of the existing basement and further excavation underneath the rear garden to form a gym room; erection of a dormer comprising of French doors with a Juliet balcony in the rear roofslope; installation of 1no rooflight above the main flat roof at roof level and 1no rooflight above the roof of first floor rear back addition; infilling of 1no existing window and installation of a new window to the side of rear back addition at first floor level; erection of an external staircase from basement to ground floor level at the front of the property.