Flat 3 6 Upper Belgrave Street London SW1X 8BD

This site has had 6 applications since 2025: 1 approved, 3 refused.

• 26/04336/LBC Awaiting decision

  Flat 3 6 Upper Belgrave Street London SW1X 8BD

  Replacement of the existing condenser and acoustic enclosure with a new unit and enclosure in the same location along with internal alterations to the third and fourth floor maisonette. (Linked with 26/04335/FULL)

  Submitted 1 Jul 2026 Heritage and listed buildings
• 26/00423/LBC Granted

  Flat 3 6 Upper Belgrave Street London SW1X 8BD

  Interior fit out to the third and fourth floors.

  Decided 16 Mar 2026 Heritage and listed buildings
• 25/06556/LBC Refused

  Flat 3 6 Upper Belgrave Street London SW1X 8BD

  Internal alterations and creation of new en-suite bathroom at fourth floor level.

  Decided 6 Oct 2025 Heritage and listed buildings
• 25/06479/LBC Refused

  Flat 3 6 Upper Belgrave Street London SW1X 8BD

  Replacement of a window with timber French doors with new balcony at rear third floor level.

  Decided 13 Feb 2026 Heritage and listed buildings
• 25/06478/FULL Refused

  Flat 3 6 Upper Belgrave Street London SW1X 8BD

  Replacement of a window with timber French doors with new balcony at rear third floor level.

  Decided 13 Feb 2026 Full applications

1. 1 Jul 2026

   Received by Westminster

2. 9 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 3 September 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.

• 26/04336/LBC Awaiting decision

  Flat 3 6 Upper Belgrave Street London SW1X 8BD

  Replacement of the existing condenser and acoustic enclosure with a new unit and enclosure in the same location along with internal alterations to the third and fourth floor maisonette. (Linked with 26/04335/FULL)

  Submitted 1 Jul 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/04336/LBC Awaiting decision

  Flat 3 6 Upper Belgrave Street London SW1X 8BD

  Replacement of the existing condenser and acoustic enclosure with a new unit and enclosure in the same location along with internal alterations to the third and fourth floor maisonette. (Linked with 26/04335/FULL)

  Submitted 1 Jul 2026 Heritage and listed buildings

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.

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.

• Flat 3 6 Upper Belgrave Street London SW1X 8BD

  26/04336/LBC Submitted 1 Jul 2026 50 yards away

  90% historically approved · decision due ~3 Sep

  Replacement of the existing condenser and acoustic enclosure with a new unit and enclosure in the same location along with internal alterations to the third and fourth floor maisonette. (Linked with 26/04335/FULL)

  Awaiting decision Heritage and listed buildings 32 docs

• Flat 3 6 Upper Belgrave Street London SW1X 8BD

  25/06479/LBC Submitted 10 Sep 2025 50 yards away

  Replacement of a window with timber French doors with new balcony at rear third floor level.

  Refused Heritage and listed buildings Windows or glazing 23 docs

• Flat 3 6 Upper Belgrave Street London SW1X 8BD

  25/06478/FULL Submitted 10 Sep 2025 50 yards away

  Replacement of a window with timber French doors with new balcony at rear third floor level.

  Refused Full applications Windows or glazing 25 docs

• Flat 3 6 Upper Belgrave Street London SW1X 8BD

  25/06556/LBC Submitted 12 Sep 2025 50 yards away

  Internal alterations and creation of new en-suite bathroom at fourth floor level.

  Refused Heritage and listed buildings 24 docs

• 6 Upper Belgrave Street London SW1X 8BD

  26/00402/LBC Submitted 23 Jan 2026 50 yards away

  Interior fit out to the fourth floor of a new ensuite shower room and new stud walls.

  Granted Heritage and listed buildings 17 docs

• Flat 3 6 Upper Belgrave Street London SW1X 8BD

  26/00423/LBC Submitted 23 Jan 2026 50 yards away

  Interior fit out to the third and fourth floors.

  Granted Heritage and listed buildings 20 docs

• 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
• 26/06015/FULL Decided

  129 Saltram Crescent London W9 3JT

  Erection of a two-storey rear extension.

  Received 3 Sep, published by the council 11 Sep 2026 Full applications
• 26/07382/FULL Awaiting decision

  90 Gloucester Place London W1U 6HS

  Use of the building as an embassy (sui generis)

  Received 28 Oct, published by the council 2 Nov 2026 Full applications
• 26/07363/FULL Awaiting decision

  36 Kilravock Street London W10 4HX

  Demolition of existing rear/side extension and construction of a new extension together with new glazing and doors, and changing the existing rooflights to the rear roof slope with new rooflights.

  Received 28 Oct, published by the council 2 Nov 2026 Full applications
• 26/07371/FULL Awaiting decision

  8A Randolph Road London W9 1AN

  Amalgamation of two residential units with internal refurbishment and reconfiguration. (Linked with 26/07372/LBC)

  Received 28 Oct, published by the council 2 Nov 2026 Full applications