Second Floor (Excluding North East Part) Devonshire House Mayfair Place London W1J 8AJ

This site has had 2 applications since 2026.

• 26/05130/LBC Decided

  Second Floor (Excluding North East Part) Devonshire House Mayfair Place London W1J 8AJ

  Installation of two air conditioning condenser units to the second floor lightwell, two internal air conditioning units, and associated pipework. (Linked with 26/05129/FULL)

  Submitted 30 Jul 2026 Heritage and listed buildings

1. 30 Jul 2026

   Received by Westminster

2. 20 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 22 Aug 2026

   Added to PlanIndex

4. 5 Oct 2026

   Status changed to Decided

   Previously Pending.

• 26/05130/LBC Decided

  Second Floor (Excluding North East Part) Devonshire House Mayfair Place London W1J 8AJ

  Installation of two air conditioning condenser units to the second floor lightwell, two internal air conditioning units, and associated pipework. (Linked with 26/05129/FULL)

  Submitted 30 Jul 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/05130/LBC Decided

  Second Floor (Excluding North East Part) Devonshire House Mayfair Place London W1J 8AJ

  Installation of two air conditioning condenser units to the second floor lightwell, two internal air conditioning units, and associated pipework. (Linked with 26/05129/FULL)

  Submitted 30 Jul 2026 Heritage and listed buildings

Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

• Second Floor (Excluding North East Part) Devonshire House Mayfair Place London W1J 8AJ

  26/05130/LBC Submitted 30 Jul 2026 50 yards away

  90% historically approved · decision due ~15 Oct

  Installation of two air conditioning condenser units to the second floor lightwell, two internal air conditioning units, and associated pipework. (Linked with 26/05129/FULL)

  Decided Heritage and listed buildings 7 docs

• Devonshire House Mayfair Place London W1J 8AJ

  26/03963/ADLBC Submitted 16 Jun 2026 50 yards away

  89% historically approved · decision due ~11 Aug

  Details of facing materials pursuant to condition 3 of listed building consent dated 19 May 2026 (RN: 25/08851/LBC).

  Decided

• Devonshire House Mayfair Place London W1J 8AJ

  25/05061/ADFULL Submitted 21 Jul 2025 50 yards away

  Detailed drawings of the new doors pursuant to condition 6 of planning permission dated 13th February 2025 (RN:24/06627/FULL)

  Granted Full applications 9 docs

• Devonshire House Mayfair Place London W1J 8AJ

  25/05178/ADLBC Submitted 21 Jul 2025 50 yards away

  Detailed drawings of the new doors pursuant to Condition 2 of listed building consent dated 13th February 2025 (RN:24/06628/LBC)

  Granted Conditions 9 docs

• Devonshire House Mayfair Place London W1J 8AJ

  23/03662/FULL Submitted 1 Jun 2023 50 yards away

  Works to the tenth floor terrace to include installation of new timber furniture shed, decking, lighting, planting and new access doors. Internal alterations at ninth and tenth floor levels. (Linked with 23/03663/LBC)

  Granted Full applications 29 docs
  Small domestic

• Devonshire House Mayfair Place London W1J 8AJ

  23/03663/LBC Submitted 1 Jun 2023 50 yards away

  Works to the tenth floor terrace to include installation of new timber furniture shed, decking, lighting, planting and new access doors. Internal alterations at ninth and tenth floor levels. (Linked with 23/03662/FULL)

  Granted Heritage and listed buildings 23 docs
  Small domestic

• 26/05708/FULL Decided

  Flat 23 Imperial Court 55 - 56 Prince Albert Road London NW8 7PT

  Replacement of existing windows and louvres.

  Received 20 Aug, published by the council 18 Sep 2026 Full applications
• 26/05984/FULL Decided

  41 Sutherland Street London SW1V 4JX

  Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

  Received 2 Sep, published by the council 11 Sep 2026 Full applications
• 26/07229/FULL Awaiting decision

  5 D'arblay Street London W1F 8DL

  Alterations to the existing fixed windows to form two openable sash windows. (Linked with 26/07230/ADV)

  Received 22 Oct, published by the council 26 Oct 2026 Full applications
• 26/07224/FULL Awaiting decision

  8 Hinde Street London W1U 3BQ

  Use of the building as an Embassy (sui generis) with reversion to Class E on cessation of occupation by the Government of the United Mexican States. Erection of a flagpole to front elevation.

  Received 22 Oct, published by the council 26 Oct 2026 Full applications
• 26/06134/FULL Decided

  Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

  Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

  Received 8 Sep, published by the council 15 Sep 2026 Full applications