14 Cavendish Square London W1G 9DB

This site has had 7 applications since 2025: 3 approved, 0 refused.

• 26/05855/ADLBC Decided

  14 Cavendish Square London W1G 9DB

  Details of doors (external) showing adjoining fabric and key details, windows showing adjoining fabric and key details, sliding roof lights above stair leading to roof terrace showing adjoining fabric and key details, works to the vaults, including any tanking and all sides of roof access leading to roof top terrace to be solid not glazed pursuant to conditions 3 (Part 1,2,3 and 6) and Condition 9 of Listed Building Consent dated 11th March 2026 (RN: 25/07887/LBC).

  Submitted 26 Aug 2026
• 26/05840/ADFULL Decided

  14 Cavendish Square London W1G 9DB

  Details of photographs and specification of facing materials; external doors, windows, sliding roof lights, and railings; and all sides of roof access pursuant to conditions 21, 25 and 26 of planning permission dated 11 March 2026 (RN: 25/07886/FULL). (Linked with 26/05855/ADLBC)

  Submitted 25 Aug 2026
• 26/05842/ADLBC Awaiting decision

  14 Cavendish Square London W1G 9DB

  Details of railings showing adjoining fabric and key details, including detailed drawings with historic building commentary of proposals, including decorative schemes to the rooms behind the front facade, hall, principal stair and stair volume and front external light well. This should include fireplaces, decorative joinery, decorative plaster work and floorboards; pursuant to condition 3(part4,7) of Listed Building consent dated 11th March 2026 (25/07887/LBC)

  Submitted 25 Aug 2026
• 26/04714/ADLBC Decided

  14 Cavendish Square London W1G 9DB

  Detailed drawings of the sliding roof lights above stair leading to roof terrace showing adjoining fabric and key details and detailed study and drawings of the roof light over the stair and its relationship to the existing decorative plasterwork pursuant to condition 3 (5) and (8) of listed building dated 11th March 2026 (RN:25/07887/LBC)

  Submitted 14 Jul 2026
• 25/07887/LBC Granted

  14 Cavendish Square London W1G 9DB

  Alterations including; demolition and alteration to roof structure including the installation of mechanical plant to roof valley above and the provision of a new terrace and associates railing and access arrangement (sliding roof light) to the rear of the main roof, removal of fixed rooflight over central stair; removal of stair from third floor terrace to plant zone at main roof level; installation of replacement roof lights at main roof level; refurbishment of main entrance door, installation of replacement security camera system, alteration to the ground and lower ground floor fenestration facing Deans Mews and facing internal lightwell, installation of replacement windows and doors at rear ground fand first floor level facing Deans Mews elevation and within the internal lightwell, removal of render to lightwell, installation of replacement cover and railings to first floor terrace, installation of onsite greening. Internal alteration and refurbishment throughout.

  Decided 11 Mar 2026 Heritage and listed buildings
• 25/07886/FULL Granted

  14 Cavendish Square London W1G 9DB

  Alterations including; demolition and alteration to roof structure including the installation of mechanical plant to roof valley above and the provision of a new terrace and associates railing and access arrangement (sliding roof light) to the rear of the main roof, removal of fixed rooflight over central stair; removal of stair from third floor terrace to plant zone at main roof level; installation of replacement roof lights at main roof level; refurbishment of main entrance door, installation of replacement security camera system, alteration to the ground and lower ground floor fenestration facing Deans Mews and facing internal lightwell, installation of replacement windows and doors at rear ground fand first floor level facing Deans Mews elevation and within the internal lightwell, removal of render to lightwell, installation of replacement cover and railings to first floor terrace, installation of onsite greening. All in connection with the use of the lower ground, ground, first and second floor level as a not forprofit museum (Class F1) and use of the third floor as residential flat (Class C3).

  Decided 11 Mar 2026 Full applications

1. 1 Aug 2025

   Received by Westminster

2. 8 Aug 2025

   Validated

   Checked as complete and ready for consideration.

3. 10 Sep 2025

   Decision issued: Application Permitted

4. 21 Jul 2026

   Added to PlanIndex

Westminster granted permission on 10 September 2025, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. 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.

• 14 Cavendish Square London W1G 9DB

  26/05855/ADLBC Submitted 26 Aug 2026 50 yards away

  89% historically approved · decision due ~21 Oct

  Details of doors (external) showing adjoining fabric and key details, windows showing adjoining fabric and key details, sliding roof lights above stair leading to roof terrace showing adjoining fabric and key details, works to the vaults, including any tanking and all sides of roof access leading to roof top terrace to be solid not glazed pursuant to conditions 3 (Part 1,2,3 and 6) and Condition 9 of Listed Building Consent dated 11th March 2026 (RN: 25/07887/LBC).

  Decided Loft or dormer Windows or glazing

• 14 Cavendish Square London W1G 9DB

  26/05840/ADFULL Submitted 25 Aug 2026 50 yards away

  89% historically approved · decision due ~20 Oct

  Details of photographs and specification of facing materials; external doors, windows, sliding roof lights, and railings; and all sides of roof access pursuant to conditions 21, 25 and 26 of planning permission dated 11 March 2026 (RN: 25/07886/FULL). (Linked with 26/05855/ADLBC)

  Decided Loft or dormer Windows or glazing

• 14 Cavendish Square London W1G 9DB

  26/04714/ADLBC Submitted 14 Jul 2026 50 yards away

  89% historically approved · decision due ~14 Sep

  Detailed drawings of the sliding roof lights above stair leading to roof terrace showing adjoining fabric and key details and detailed study and drawings of the roof light over the stair and its relationship to the existing decorative plasterwork pursuant to condition 3 (5) and (8) of listed building dated 11th March 2026 (RN:25/07887/LBC)

  Decided Loft or dormer 27 docs

• 14 Cavendish Square London W1G 9DB

  26/05842/ADLBC Submitted 25 Aug 2026 50 yards away

  89% historically approved · decision due ~20 Oct

  Details of railings showing adjoining fabric and key details, including detailed drawings with historic building commentary of proposals, including decorative schemes to the rooms behind the front facade, hall, principal stair and stair volume and front external light well. This should include fireplaces, decorative joinery, decorative plaster work and floorboards; pursuant to condition 3(part4,7) of Listed Building consent dated 11th March 2026 (25/07887/LBC)

  Awaiting decision

• 14 Cavendish Square London W1G 9DB

  25/07886/FULL Submitted 30 Oct 2025 50 yards away

  Alterations including; demolition and alteration to roof structure including the installation of mechanical plant to roof valley above and the provision of a new terrace and associates railing and access arrangement (sliding roof light) to the rear of the main roof, removal of fixed rooflight over central stair; removal of stair from third floor terrace to plant zone at main roof level; installation of replacement roof lights at main roof level; refurbishment of main entrance door, installation of replacement security camera system, alteration to the ground and lower ground floor fenestration facing Deans Mews and facing internal lightwell, installation of replacement windows and doors at rear ground fand first floor level facing Deans Mews elevation and within the internal lightwell, removal of render to lightwell, installation of replacement cover and railings to first floor terrace, installation of onsite greening. All in connection with the use of the lower ground, ground, first and second floor level as a not forprofit museum (Class F1) and use of the third floor as residential flat (Class C3).

  Granted Full applications Loft or dormer Roofing +2 150 docs

• 14 Cavendish Square London W1G 9DB

  25/07887/LBC Submitted 30 Oct 2025 50 yards away

  Alterations including; demolition and alteration to roof structure including the installation of mechanical plant to roof valley above and the provision of a new terrace and associates railing and access arrangement (sliding roof light) to the rear of the main roof, removal of fixed rooflight over central stair; removal of stair from third floor terrace to plant zone at main roof level; installation of replacement roof lights at main roof level; refurbishment of main entrance door, installation of replacement security camera system, alteration to the ground and lower ground floor fenestration facing Deans Mews and facing internal lightwell, installation of replacement windows and doors at rear ground fand first floor level facing Deans Mews elevation and within the internal lightwell, removal of render to lightwell, installation of replacement cover and railings to first floor terrace, installation of onsite greening. Internal alteration and refurbishment throughout.

  Granted Heritage and listed buildings Loft or dormer Roofing +2 150 docs

• 26/07508/FULL Awaiting decision

  Buckingham Palace The Mall London SW1A 1AA

  Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

  Received 4 Nov, published by the council 5 Nov 2026 Full applications
• 26/07460/FULL Awaiting decision

  1 Hanover Square London W1S 1HA

  Installation of new public art sculptures and seating; hard and soft landscaping; installation of an area of raised terrace decking on St George Street measuring 43m x 2.6m for the placing of tables, chairs and banquette benches in connection with restaurant use; and associated external alterations and enabling works.

  Received 3 Nov, published by the council 5 Nov 2026 Full applications
• 26/07451/FULL Awaiting decision

  Flat 1 31 South Audley Street London W1K 2PG

  Replacement of windows, Installation of an external condenser to the rear elevation including Internal refurbishment. (linked with 26/07452/LBC)

  Received 2 Nov, published by the council 4 Nov 2026 Full applications
• 26/07443/FULL Awaiting decision

  150 Great Portland Street London W1W 6QD

  Installation of three air conditioning condenser units to the lower ground floor rear courtyard, incluidng erection of a plunge pool. (retrospective)

  Received 2 Nov, published by the council 4 Nov 2026 Full applications
• 26/06234/FULL Decided

  40 Grosvenor Place London SW1X 7HJ

  Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

  Received 11 Sep, published by the council 18 Sep 2026 Full applications