24 De Walden Street London W1G 8RN

1. 3 Apr 2026

   Received by Westminster

2. 22 Apr 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 17 June 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 91 days over the applications it decided in the last year.

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided amendment applications in a median of 81 days. More in our guide to how long planning decisions take.

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

• 13 Westmoreland Street London W1G 8PJ

  07/02006/FULL Submitted 2 Mar 2007 50 yards away

  Installation of awning and incorporation of a new gate into existing railings.

  Refused Full applications 7 docs

• 5 Westmoreland Street London W1G 8PJ

  10/10681/ADFULL Submitted 6 Dec 2010 50 yards away

  Approval of details pursuant to Condition 1 of the planning permission dated 7 October 2010 (RN:10/05897); namely, details of how the roof level timber structure is to be treated in a way that tones down its appearance.

  Granted Full applications 4 docs

• 35 New Cavendish Street London W1G 9TR

  11/06904/ADFULL Submitted 18 Jul 2011 50 yards away

  Approval of details pursuant to Condition 5 of planning permission dated 19 April 2011 (RN:11/00118), namely the submission of detailed drawings (scale 1:5, 1:20) of the extract cladding.

  Refused Full applications 4 docs

• 35 New Cavendish Street London W1G 9TR

  11/00112/CAC Submitted 24 Dec 2010 50 yards away

  Installation of two retractable awnings to the front and side elevation, and five new high level uplights to replace existing.

  Decided Heritage and listed buildings 2 docs

• 35 New Cavendish Street London W1G 9TR

  12/00091/ADFULL Submitted 23 Dec 2011 50 yards away

  Detailed drawings (scale 1:5; 1:20) of louvres and samples of louvre material and colour, pursuant to Condition 7 and 8 of planning permission dated 19 April 2011 (RN:11/00118).

  Granted Full applications 4 docs

• 33 - 35 New Cavendish Street London W1G 9TS

  12/00703/ADFULL Submitted 24 Jan 2012 50 yards away

  Approval of details pursuant to Condition 3 of planning permission dated 12 January 2012 (RN:11/11042), namely, the submission of detailed drawings to show that the rear windows are openable.

  Granted Full applications Windows or glazing 4 docs

• 26/07459/NMA Awaiting decision

  1 Hanover Square London W1S 1HA

  Amendments to planning pemrission dated 10 October 2025 (RN: 25/01558/FULL) for the: Partial demolition, refurbishment and extension of the existing building to provide a sub-basement, basement, ground plus eight storey building; infilling and stepped rear extension; excavation of a new sub-basement level; installation of new plant equipment at basement and roof level; terraces at fourth, fifth, sixth, seventh and eighth floor levels; soft and hard landscaping; reprovision of car parking; new cycle parking facilities; and associated external works. Use of the building for retail and/or restaurant (Class E) on part ground floor and office (Class E) on all other floors. NAMELY, to allow alterations to the design of the ground floor frontages on Hanover Square and St George Street.

  Received 3 Nov, published by the council 5 Nov 2026 Amendments
• 26/07438/NMA Awaiting decision

  29 - 31 Hill Street London W1J 5LS

  Amendments to planning permission dated 1st July 2025 (RN 25/01006/FULL) for the external alterations at roof level including the creation of Level 04 roof terrace for use in association with existing office (Class E), replacement and installation of new plant and landscaping, replacement of windows, introduction of louvres, removal and replacement of rooflights, installation of new rooflight and other associated works. NAMELY, for alterations comprising of the removal of window sash boxes and weights, changes to the window mullion arrangement, the removal of two sash windows, the installation of secondary glazing, the removal of existing chamber hatch and installation of extract vent and integrated bench, the external replacement of rainwater goods and hoppers, the removal of bricks and installation of airbricks, minor demolition works, replacement of roof covering, removal of ductwork, roof plant rearrangement, the installation of a new external door to plant area, minor layout alterations and other associated works.

  Received 2 Nov, published by the council 6 Nov 2026 Amendments
• 26/07389/NMA Decided

  Flat 1 5 Grittleton Road London W9 2DD

  Amendments to planning permission dated 04 June 2025 (RN: 25/02022/FULL), NAMELY, amendment of Condition 4 to correct the property address from 9 Aldridge Road Villas to Flat 1 5 Grittleton Road.

  29 Oct 2026 Amendments
• 26/07377/NMA Awaiting decision

  60 Ledbury Road London W11 2AJ

  Amendments to planning permission dated 2nd October 2025 (RN 25/04018/FULL) for the Partial demolition, refurbishment, and erection of a mansard roof extension to form a new third floor with dormers to front, side and rear elevations; to form 6 flats (Class C3) on upper floors; external plant equipment and ductwork; lower ground floor excavation to increase floor to ceiling height; replacement windows; cycle parking and associated external alterations; use of the part ground floor and lower ground floor as retail and restaurant (Class E). Site includes 60-68 Ledbury Road) NAMELY, An amendment to the basement and ground floor drawing reference numbers; amendment to the description of development, in reference to restaurant and or retail use; and amendments to C

  Received 28 Oct, published by the council 3 Nov 2026 Amendments
• 26/07375/NMA Awaiting decision

  77 Hereford Road London W2 5BB

  Amendments to planning permission dated 4th August 2026 (RN 26/03970/FULL) for the Replacement of roof terrace access stair with glazed hatch, new timber decking and front and rear roof railings to roof terrace, with infilling side window of closet wing. NAMELY, Hinged hatch access substituted by sliding hatch.

  Received 28 Oct, published by the council 3 Nov 2026 Amendments