Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

This site has had 8 applications since 2026: 6 approved, 0 refused.

• CON/26/01494 Awaiting decision

  Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  Discharge of Condition (submission of details - v) section (1:20/1:10) drawings of relationship between the lowered floor slab and historic footings at lower ground floor indicating the retention of historic footings) of Listed Building consent LB/25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works)

  Submitted 8 Apr 2026 Conditions
• LB/26/02022 Granted

  Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  Variation of conditions 2 (approved drawings) and 3 (submission of details) of listed building consent LB/25/02622 to allow layout changes to lower ground floor rooms and other internal works; and removal of condition 7 (demolition - hand tools only)

  Decided 4 Jun 2026 Heritage and listed buildings
• CON/26/01254 Granted

  Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  Details required by Condition 3 (submission of details - c) plan (1:10) and section (1:5) drawings of new rooflights, including curved rooflight and pavement light) of Listed Building consent LB/25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works)

  Decided 20 May 2026 Conditions
• CON/26/01257 Granted

  Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  Details required by condition 3(Submission of details - w) extent and form of alterations to floor structure in G11, demonstrating retention of joists and any surviving floor surfaces) of listed building consent LB/25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works)

  Decided 19 May 2026 Conditions
• CON/26/01256 Granted

  Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  Details required by Condition 3 (v) (Submission of Details) of?Listed Building Consent LB/25/02622?(Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works).?

  Decided 20 May 2026 Conditions
• CON/26/01255 Granted

  Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  Details required by condition 3(g)(submission of details - (g) Elevation (1:5) drawings and photographs of proposed airbricks;) of listed building consent 25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works).

  Decided 20 May 2026 Conditions
• CON/26/01253 Granted

  Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  Details required by Condition 3 (submission of details - a) elevation (1:10) and section (1:5) drawings of new external doors and architraves with details of mouldings in section (1:1). New doors shall be made of solid timber and hand painted, unless otherwise specified in the approved drawings) of Listed Building consent LB/25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works)

  Decided 20 May 2026 Conditions

1. 1 Apr 2026

   Received by Kensington and Chelsea

2. 20 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 27 May 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 amendment applications in a median of 38 days. More in our guide to how long planning decisions take.

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

• Flat 3, 55 Onslow Square, London, SW7 3LR

  ARB/23/01319 Submitted 23 Feb 2023 0m away

  Prune 1 x Lime Tree in rear garden.

  Granted Trees 7 docs

• Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  CON/26/01257 Submitted 23 Jan 2026 0m away

  Details required by condition 3(Submission of details - w) extent and form of alterations to floor structure in G11, demonstrating retention of joists and any surviving floor surfaces) of listed building consent LB/25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works)

  Granted Conditions Extension Demolition 13 docs

• Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  CON/26/01256 Submitted 23 Jan 2026 0m away

  Details required by Condition 3 (v) (Submission of Details) of?Listed Building Consent LB/25/02622?(Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works).?

  Granted Conditions Extension Demolition 14 docs

• Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  CON/26/01255 Submitted 23 Jan 2026 0m away

  Details required by condition 3(g)(submission of details - (g) Elevation (1:5) drawings and photographs of proposed airbricks;) of listed building consent 25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works).

  Granted Conditions Extension Demolition 7 docs

• Flat 4, 51 Onslow Square, London, SW7 3LR

  LB/26/02270 Submitted 17 Apr 2026 0m away

  96% historically approved · decision due ~12 Jun

  Internal alterations to existing bathrooms, creation of a laundry room and associated alterations.

  Awaiting decision Heritage and listed buildings 21 docs

• Flat 3, 55 Onslow Square and 57 Onslow Square, London, SW7 3LR

  CON/26/01253 Submitted 9 Jan 2026 0m away

  Details required by Condition 3 (submission of details - a) elevation (1:10) and section (1:5) drawings of new external doors and architraves with details of mouldings in section (1:1). New doors shall be made of solid timber and hand painted, unless otherwise specified in the approved drawings) of Listed Building consent LB/25/02622 (Part demolition to allow erection of orangery, lower ground rear extension, introduction of AC units and internal works)

  Granted Conditions Extension Demolition 13 docs

• NMA/26/04056 Awaiting decision

  10 Kensington Palace Gardens, London, W8 4QP

  Non-material amendment to planning permission PP/24/07201 to allow the reintroduction of an internal swimming pool to the lower ground/ undercroft of the main house, including associated works to internal servicing arrangements and spatial arrangement (including the omission of modern piers put forward under the Second Section 73 Application)

  Received 24 Jul, published by the council 3 Aug 2026 Amendments
• NMA/26/04001 Awaiting decision

  Land adjoining 2 Horbury Crescent, London, W11 3NF

  Non-material amendment to planning permission PP/23/08263 (Construction of a two-bedroom residential dwelling across ground and basement levels.) relocation of stairs and internal partitions. Changes to rooflights and terrace areas.

  Received 23 Jul, published by the council 3 Aug 2026 Amendments
• NMA/26/03986 Awaiting decision

  30 Brompton Square, London, SW3 2AE

  Non material amendment to planning permission 26/00660 (Variation of condition 2 (compliance with approved drawings) of planning permission 13/05535 (Redevelopment of lower ground floor in garden, excavation of two basement levels, replacement of glass pavilion, re-landscaping of rear garden and associated alterations) to allow for internal and external alterations to the approved scheme including reconfigured layouts, depths, and floor areas at basement levels 1,2, and 3, alterations to lightwells and introduction of a new lightwell; removal of the secondary staircase in the garden pavilion and the bridge over the rear lightwell and introduction of new york stone stairs at ground floor level; and changes to the lightwell and removal of the bridge at first floor level.) to remove the word 'glass' from the description above; i.e. (Variation of condition 2 (compliance with approved drawings) of planning permission 13/05535 (Redevelopment of lower ground floor in garden, excavation of two basement levels, replacement of pavilion, re-landscaping of rear garden and associated alterations) to allow for internal and external alterations to the approved scheme including reconfigured layouts, depths, and floor areas at basement levels 1,2, and 3, alterations to lightwells and introduction of a new lightwell; removal of the secondary staircase in the garden pavilion and the bridge over the rear lightwell and introduction of new york stone stairs at ground floor level; and changes to the lightwell and removal of the bridge at first floor level.)

  Received 22 Jul, published by the council 1 Aug 2026 Amendments
• NMA/26/02562 Decided

  Treadgold House, 25 Bomore Road, London, W11 4HD

  Non-material amendment to planning permission PP/23/02367 dated 22 November 2022 (Alterations to existing facades including: installation of new external insulation system, replacement of all existing windows, works to balconies including addition of louvred shading, installation of new ground floor communal external doors and canopy; Alterations at roof level including:removal and replacement of roof system and guarding, construction of new parapet upstand, installation of photovoltaic panels; Replacement of all rainwater goods (amended description).) to allow the addition of a 2100 mm Width x 800 mm Deep x 1600 mm Height GRP white enclosure located to the South Elevation at Ground Floor Level; addition of No3 satellite grey dishes 775mm x 775mm with non-penetrating roof mount 1200mm x 1200mm located on the roof; revised ASHP pipework arrangement; and addition of No3 maintenance access step units (galvanised non-combustible stairs.

  Received 8 May, published by the council 1 Aug 2026 Amendments
• NMA/26/02178 Withdrawn

  17-19 Cottesmore Gardens, London, W8 5PR

  Non-material amendment to planning permission PP/24/01317 to allow design updates, including revisions to the demolition drawings, removal of planters from non-accessible terraces and modifications to skylights and dry riser inlets

  Received 13 Apr, published by the council 20 Jul 2026 Amendments