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 65 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 54 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 8m 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 8m 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 20m 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 20m 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 20m 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 22m 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

• 26/06251/NMA Awaiting decision

  19 Cumberland Street London SW1V 4LS

  Amendments to planning permission dated 20th March 2026 (RN:25/08960/FULL) for Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment, namely the change of conservatory gable roof to a flat GRP roof.

  11 Sep 2026 Amendments
• 26/06201/NMA Awaiting decision

  Almack House 28 King Street St James's London SW1Y 6QW

  Amendments to planning permission dated 16th April 2026 (RN:26/01487/FULL) for Installation of a mechanical plant at lower ground floor and installation of two grilles to two lower ground floor windows, namely change to approved grille.

  10 Sep 2026 Amendments
• 26/06212/NMA Awaiting decision

  10 - 11 Lancaster Gate London W2 3LH

  Amendment to Condition 12 (Whole Life Carbon) of planning permission dated 19th April 2024 (RN 23/04044/FULL) for Change of use from hotel to residential use (Class C3) with associated internal alterations to create 11 new units and external alterations comprising reconfiguration and recladding of the rear extension and restoration of the existing building. Namely to include additional requirement to evidence and justify where benchmarks cannot be achieved, consider mitigation measures and if none, evidence that all mitigation measures have been exhausted. (Linked with RN 26/06213/ADFULL)

  10 Sep 2026 Amendments
• 26/06211/NMA Awaiting decision

  15 Portland Place London W1B 1PT

  Amendments to planning permission dated 21th July 2022 (RN:22/03521/FULL) for Variation of condition 5 of planning permission dated 11th April 2018 (17/10815/FULL) for the Use of the building for a temporary period of 20 years as a medical use (Use Class D1) personal to OM Tower LLP. Namely, to amend condition 3.

  10 Sep 2026 Amendments
• 26/06199/NMA Awaiting decision

  33 - 35 Praed Street London W2 1NR

  Amendments to planning permission dated 24th Septmebr 2024 (RN:24/03287/FULL) for Use of lower ground and ground floors as supermarket with ancillary bakery (Class E); Use of first, second and third floors as aparthotel with 19 bedrooms (Class C1); Installation of plant machinery and solar thermal panels at roof level, Replacement of windows; and associated external alterations. Namely, Introduction of two shawarma grill machines in the supermarket area at ground floor level; the introduction of a new canopy to provide ventilation for the two shawarma grill machines; and amendments to the ventilation design for the lower ground floor bakery canopy extract.

  10 Sep 2026 Amendments