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 65 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 89 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 0m 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 2m 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 2m 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 4m 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 4m 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 4m away

  Interior fit out to the third and fourth floors.

  Granted Heritage and listed buildings 20 docs

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront.

  15 Sep 2026 Full applications
• 26/06297/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Alterations to rear elevation at basement level comprising repolacement window and installation of double opening door.

  15 Sep 2026 Full applications
• 26/06234/FULL Awaiting decision

  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))

  11 Sep 2026 Full applications
• 26/06249/FULL Awaiting decision

  53 Wimpole Street London W1G 8YH

  Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06250/LBC)

  11 Sep 2026 Full applications
• 26/03576/FULL Decided

  15A Devonshire Terrace London W2 3DW

  Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

  1 Jun 2026 Full applications