Erection of single storey mansard roof extension to create additional residential (Class C3) floorspace and rear terrace at second floor level with associated works to the building including new and replacement windows. [Revised Description of Development to include terrace]

Use of the property as five residential units (Class C3), external works to pavement vault area to provide a cycle and refuse store and building services plant room; installation of a rooflight to the rear facing roof slope; repair works to include insulation within the roof of the terrace; thermal insulation of the rear extension, replacement windows; repair the street facing stucco work and bay window at lower ground floor and cracks in the first floor balcony and internal works. (Linked with 23/03227/LBC)

Variation of condition 1 of the planning permission dated 20 June 2013 (RN:12/09687/FULL) for the Use as nine residential flats (Class C3) and external alterations, including excavation of extended basement floor, erection of replacement rear extensions, formation of roof terraces, replacement of mansard roof extension and installation of mechanical plant at roof level to No.73, alteration and replacement of external railings and new windows and doors ; Namely , amendments to the layout and areas of residential demises and internal circulation strategy; Installation of sprinkler; Alterations to rooftop and basement plant layout and installation of plant to second floor terrace; Alterations to waste storage arrangements; and expansion of green roof at third floor level. (Linked to 23/00772/LBC)

Variation of condition 1 of planning permission dated 6th June 2023 (RN 23/00698/FULL) for the erection of single storey roof extension to rear courtyard building, replacement windows, installation of railings around a new front lightwell and associated works, all for use of enlarged building as 6 self-contained residential dwellings comprising 5 x1 bedroom and 1 x 3 bedroom units (Class C3). NAMELY, for a new lift to serve the residential flats; and new connecting ramp, which would link the front and rear buildings to provide level access.

Variation of Condition 1 of planning permision dated 16 October 2023 (RN: 23/05842/FULL), which itself varied planning permission dated 22 December 2022 (RN: 22/06621/FULL) for: Reconfiguration of two residential units to form one unit within Nos. 25, 26 and 48; and new residential unit within No. 49; installation of four condenser units, two on each of the roofs of Nos. 25 and 26; and extension at rear third and fourth floor level of No. 25 and associated works (site includes 25-26 Chester Square and 49-48 Eaton Mews South). NAMLEY, to allow works to front lower ground floor including new York stone paving to lightwell with single step below external staircase, new timber sash window with sidelights, new security railings to both windows in lightwell at no. 25, to match no. 26 existing railings; new York stone paving at no. 26, lightwell, and new Portland stone to both no. 25 and no. 26; rear elevation works include new glazing and glazing bar layout to external door to rear elevation, omit proposed screen between 25 and 26 terraces, new metal railings to coping at no. 25 terrace, and new double dormer; new front door, garage gate and associated fanlights at no. 48.

Amalgamation of 3 residential units, to provide 2 x 3 bed residential units, extension and alterations to roof and installation of 2 rear dormer windows.

Demolition of the existing rear modern extension and replacement with new infill extension at basement, ground and first floor level. Creation of a new residential unit and reconfiguration of existing residential accommodation across all floors. Installation of a new lift for level access; installation of new windows and external plant units at rear second floor level and associated internal and external alterations.

Variation of condition 1 of planning permission dated 11 August 2023 (RN:23/00368/FULL) for Variation of Condition 1 of planning permission dated 16 February 2017 (16/10409/FULL) for the use of part basement, part ground floor level and first to fourth floor levels and the erection of a mansard roof extension at fifth floor level to provide 14 residential flats (Class C3). Provision of external terraces at rear second, third, fourth floor and fifth floor level. Installation of mechanical plant at fourth and fifth floor level. Lowering of the existing basement vault floor below Andrew's Crosse by 0.5m and installation of new lightwells and railings at basement and ground floor level on the Andrew's Crosse elevation. Associated alterations to windows on the front and rear elevation and associated internal alterations at 116-118 Chancery Lane and removal of part of the external staircase adjacent to 115 Chancery Lane and alterations to the roof profile at rear fifth floor level and relocation of plant; namely, alterations to the size and number of dormers to the rear roof extension serving Flat 4.1 and installation of a new roof access enclosure to the front part of the roof area and insertion of a high level window at basement level. Namely, to regularise the now constructed plant and sprinkler storage tank in the bank vault room and gain planning permission for the proposed cycle store and new fire escape route from the bank.

Erection of a single storey extension at sixth floor level with a terrace to the rear. Demolition of existing rear lower ground floor extension and erection of an alternate extension in the northern portion of the rear garden with a terrace above. Partial infilling of internal lightwell from first to fifth floor level adjacent to No. 4 Balfour Place to accommodate a lift. External alterations including modifications to the rear fenestration, replacement window and installation of railing detailing to the front elevation, modifications to main entrance portico, alteration to fire access arrangement and associated works. Reconfiguration of existing building, and together with the proposed extensions to provide six residential units (one additional unit) (Class C3).

Variation of Condition 1 of planning permission dated 16 February 2017 (16/10409/FULL) for the use of part basement, part ground floor level and first to fourth floor levels and the erection of a mansard roof extension at fifth floor level to provide 14 residential flats (Class C3). Provision of external terraces at rear second, third, fourth floor and fifth floor level. Installation of mechanical plant at fourth and fifth floor level. Lowering of the existing basement vault floor below Andrew's Crosse by 0.5m and installation of new lightwells and railings at basement and ground floor level on the Andrew's Crosse elevation. Associated alterations to windows on the front and rear elevation and associated internal alterations at 116-118 Chancery Lane and removal of part of the external staircase adjacent to 115 Chancery Lane and alterations to the roof profile at rear fifth floor level and relocation of plant; namely, alterations to the size and number of dormers to the rear roof extension serving Flat 4.1 and installation of a new roof access enclosure to the front part of the roof area and insertion of a high level window at basement level.