Flat 8, 20 Onslow Square, London, SW7 3NP

This site has had 2 applications since 2026.

• LB/26/03108 Awaiting decision

  Flat 8, 20 Onslow Square, London, SW7 3NP

  General refurbishment of flat with minimal layout and non-original fabric changes, replacement of windows and installation of an AC condenser on existing terrace.

  Submitted 12 Jun 2026 Heritage and listed buildings

1. 12 Jun 2026

   Received by Kensington and Chelsea

2. 20 Jul 2026

   Added to PlanIndex

3. 10 Aug 2026

   Status changed to Pre-Determination Stage

   Previously Validated and Registered.

4. Decision

   Awaiting decision

   Decision expected by 7 August 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Kensington and Chelsea took a median of 84 days over the applications it decided in the last year.

This application is with Kensington and Chelsea for determination, against a statutory target of eight weeks. Over the last year Kensington and Chelsea decided full applications in a median of 111 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 8, 20 Onslow Square, London, SW7 3NP

  LB/26/03108 Submitted 12 Jun 2026 50 yards away

  96% historically approved · decision due ~7 Aug

  General refurbishment of flat with minimal layout and non-original fabric changes, replacement of windows and installation of an AC condenser on existing terrace.

  Awaiting decision Heritage and listed buildings Windows or glazing 17 docs

• 2-42 Onslow Square, London, SW7 3NP

  ARB/24/05608 Submitted 15 Aug 2024 50 yards away

  Prune 1 x Catalpa bignonioides (Indian Bean Tree) rear of 18 Onslow Square

  Granted Trees 7 docs

• 2 Onslow Square, London, SW7 3NP

  ARB/21/04228 Submitted 29 Jun 2021 50 yards away

  Pruning 1 x Indian Bean Tree.

  Granted Trees 4 docs

• 2 Sydney Place, London, SW7 3NN

  PP/25/05502 Submitted 10 Sep 2025 50 yards away

  Installation of air conditioning units to rear elevation

  Refused Full applications 17 docs

• 2 Sydney Place, London, SW7 3NN

  LB/25/05503 Submitted 10 Sep 2025 50 yards away

  Installation of air conditioning units to rear elevation

  Refused Heritage and listed buildings 6 docs

• 5 Sydney Place, London, SW7 3NN

  ARB/23/07564 Submitted 16 Nov 2023 50 yards away

  Prune x 1 silver birch (rear)

  Granted Trees 8 docs

• PP/18/01985 Withdrawn

  Flat 3, 24 Cornwall Gardens, London, SW7 4AW

  Works to second floor flat including erection of rear extension, creation of external roof terrace areas above and to rear of said extension (with perimeter metal railings), together with internal alterations including removal of internal wall between kitchen and living room, and other refurbishment works

  Received 9 Apr, published by the council 1 Aug 2026 Full applications
• PP/26/03176 Granted

  12 Shawfield Street, London, SW3 4BD

  Replacement windows, new rooflight and replacement lower ground rear rooflights.

  Received 15 Jun, published by the council 20 Jul 2026 Full applications
• PP/26/03048 Granted

  24 Charles II Place, London, SW3 4NG

  Removal of existing conservatory structure. Construction of a single-storey rear extension at lower ground floor level. Installation of a contemporary three-panel sliding glazed door opening onto rear garden. Internal reconfiguration at lower ground floor level.

  Received 9 Jun, published by the council 20 Jul 2026 Full applications
• PP/26/03042 Granted

  Flat 7, 7 Egerton Place, London, SW3 2EF

  Installation of air conditioning system including external condenser unit housed within enclosure at roof level. Replacement of roof lantern, rooflight and roof access hatch with flat glazed access hatch and rooflights. Replacement of two rear elevation uPVC windows with timber-framed slimline double-glazed sliding sash windows; and associated external alterations.

  Received 9 Jun, published by the council 20 Jul 2026 Full applications
• PP/26/02897 Withdrawn

  46 Evelyn Gardens, London, SW7 3BH

  Positioning of two new external heat pump condensers within two separate acoustic enclosures, one on main roof of house and other on rear forth floor roof terrace.

  Received 1 Jun, published by the council 20 Jul 2026 Full applications