Flat 3 6 Upper Belgrave Street London SW1X 8BD

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

• 26/04335/FULL 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 26/04336/LBC)

  Submitted 1 Jul 2026 Full applications
• 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.

• 26/04335/FULL 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 26/04336/LBC)

  Submitted 1 Jul 2026 Full applications

1 later application on the register refers to this one:

• 26/04335/FULL 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 26/04336/LBC)

  Submitted 1 Jul 2026 Full applications

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

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

• Flat 3 6 Upper Belgrave Street London SW1X 8BD

  26/04335/FULL Submitted 1 Jul 2026 50 yards away

  88% 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 26/04336/LBC)

  Awaiting decision Full applications 33 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

• 26/05473/LBC Decided

  9A Grosvenor Square London W1K 5AE

  Installation of natural Portland Stone paving to two front entrances. (Linked to 26/06273/FULL)

  Received 12 Aug, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/07390/LBC Awaiting decision

  40 Wigmore Street London W1U 2RX

  Installation of a non-illuminated fascia sign measuring 0.29m x 0.79m and two vinyl signs applied to inside face of the glazed shopfront each measuring 0.22m x 0.84m. (Linked with 26/06970/ADV)

  29 Oct 2026 Heritage and listed buildings
• 26/07372/LBC Awaiting decision

  8A Randolph Road London W9 1AN

  Amalgamation of two residential units with internal refurbishment and reconfiguration. (Linked with 26/07371/FULL)

  Received 28 Oct, published by the council 2 Nov 2026 Heritage and listed buildings
• 26/07332/LBC Awaiting decision

  Royal Courts Of Justice Strand London WC2A 2LL

  Replacement of one platform lift within the grade 1 listed Royal Court?s of Justice building.

  Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings
• 26/07336/LBC Awaiting decision

  Charing Cross Hotel Strand London WC2N 5HX

  Installation of replacement timber handrail and brackets to one flight of main staircase.

  Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings