Demolition of existing pitched roof and construction of a mansard roof extension across both properties (29-31 Choumert Grove) with four dormer windows to the front elevation and two to the rear elevation to provide additional living accommodation, together with raising the existing parapet wall to the rear elevation and replacing all of the existing windows with aluminium framed casement windows.

Details of Condition 4 'Archaeological Evaluation' pursuant to planning permission ref. no. 21/AP/0179 as amended by 22/AP/1704: Non-material amendment of planning permission 21/AP/0179 Construction of a part two, part five storey extensions to provide additional office accommodation (E(g)(i) Class) and associated cycle parking and refuse storage: Loading bay and columns at ground floor and three windows on part pf the north facade re-positioned; size of three windows on part of the north facade floor changed, connected column on upper levels split into three components, fourth floor terraces to have returns that wrap into the facade, layout amended, balustrade added to roof, east elevation material finish to party wall line changed from terracotta cladding panels in satin off-white glaze to glazed brick with off-white glaze and photovolatic panels increased from 73 to 82.

Details of Condition 5 'Archaeological Pre-commencement Foundation' pursuant to planning permission ref. no. 21/AP/0179 as amended by 22/AP/1704: Non-material amendment of planning permission 21/AP/0179 Construction of a part two, part five storey extensions to provide additional office accommodation (E(g)(i) Class) and associated cycle parking and refuse storage: Loading bay and columns at ground floor and three windows on part pf the north facade re-positioned; size of three windows on part of the north facade floor changed, connected column on upper levels split into three components, fourth floor terraces to have returns that wrap into the facade, layout amended, balustrade added to roof, east elevation material finish to party wall line changed from terracotta cladding panels in satin off-white glaze to glazed brick with off-white glaze and photovolatic panels increased from 73 to 82.

Construction of outrigger dormer loft extension with the installation of 1no roof window in front roof slope to provide additional living accommodation.

Raise ridgeline by 250mm; L-shaped dormer loft extension with 2no roof windows in front roof slope to provide additional living accommodation. Construction of a timber slatted roof terrace to the rear of the dormer.

Construction of a first floor roof extension to the rear outrigger and dormer window to the rear roof plane, and two roof lights to the principal roof plane to facilitate the introduction of additional living accommodation to the existing first floor flat, provision of double doors to the ground floor rear bedroom and Juliet balcony to the first floor rear bedroom.