15 Chelsea Square, London, SW3 6LF

This site has had 5 applications since 2024: 4 approved, 0 refused.

• PP/26/01705 Granted

  15 Chelsea Square, London, SW3 6LF

  Construction of a single-storey basement extension, reconfiguration of the open space/garden at the rear of the property at both basement and ground floor levels, replacement of the L-shaped external concrete staircase with a steel spiral staircase, realignment of the rear wall of the main basement accommodation outwards by 1.5 metres into the paved external area, proposed extension of the ground floor rear terrace by approx. 0.7m over the top of the extended basement accommodation and window fenestration alterations to cinema room.

  Decided 10 Jun 2026 Full applications
• CON/26/00449 Granted

  15 Chelsea Square, London, SW3 6LF

  Details required by condition 7 (Contamination - Verification Report) of planning permission 23/02435 (Construction of single-storey basement extension below footprint of property; demolition of rear single-storey flat roof structure; replacement windows at courtyard elevation; replacement of 4 windows and door with French doors; replacement of railings on parapet wall around second floor roof terrace).

  Decided 20 Apr 2026 Conditions
• CON/25/04789 Withdrawn

  15 Chelsea Square, London, SW3 6LF

  Details required by condition 7 (Contamination - Verification report) of planning permission 23/02435 (Construction of single-storey basement extension below footprint of property; demolition of rear single storey flat roof structure; replacement windows at courtyard elevation; replacement of 4 windows and door with French doors; replacement of railings on parapet wall around second floor roof terrace)

  Decided 2 Oct 2025 Conditions
• PP/24/05884 Granted

  15 Chelsea Square, London, SW3 6LF

  Installation of five air conditioning units within a louvered acoustic enclosure at rear of second floor roof terrace

  Decided 12 Nov 2024 Full applications

1. 26 Feb 2026

   Received by Kensington and Chelsea

2. 5 Jun 2026

   Decision issued: Grant Planning Permission/Consent

3. 20 Jul 2026

   Added to PlanIndex

Kensington and Chelsea granted permission on 5 June 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 15 Chelsea Square, London, SW3 6LF

  PP/24/05884 Submitted 2 Sep 2024 0m away

  Installation of five air conditioning units within a louvered acoustic enclosure at rear of second floor roof terrace

  Granted Full applications 23 docs

• 15 Chelsea Square, London, SW3 6LF

  PP/26/01705 Submitted 8 Mar 2026 0m away

  Construction of a single-storey basement extension, reconfiguration of the open space/garden at the rear of the property at both basement and ground floor levels, replacement of the L-shaped external concrete staircase with a steel spiral staircase, realignment of the rear wall of the main basement accommodation outwards by 1.5 metres into the paved external area, proposed extension of the ground floor rear terrace by approx. 0.7m over the top of the extended basement accommodation and window fenestration alterations to cinema room.

  Granted Full applications Extension Windows or glazing 28 docs
  Small domestic

• 23 Chelsea Square, London, SW3 6LF

  ARB/26/01031 Submitted 19 Mar 2026 0m away

  FELL 1x Gleditsia at rear

  Granted 7 docs

• 13 Chelsea Square, London, SW3 6LF

  CON/22/01555 Submitted 7 Mar 2022 0m away

  Details required by condition nos. 3 (construction traffic management plan (CTMP)) and 4 (professional management of engineering works) of planning permission 21/07922 (Construction of single-storey basement extension below the footprint of the property; removal of extension attached to the flank wall of garage to rebuild the flank wall and install a new door and glazed panel; alterations to fenestration at front and rear elevations; and installation of black painted metal railings to the top of the parapet wall)

  Granted Conditions Extension Windows or glazing 8 docs
  Small domestic

• 15 Chelsea Square, London, SW3 6LF

  CON/26/00449 Submitted 12 Dec 2025 0m away

  Details required by condition 7 (Contamination - Verification Report) of planning permission 23/02435 (Construction of single-storey basement extension below footprint of property; demolition of rear single-storey flat roof structure; replacement windows at courtyard elevation; replacement of 4 windows and door with French doors; replacement of railings on parapet wall around second floor roof terrace).

  Granted Conditions Extension Demolition +1 14 docs
  Small domestic

• 14 Chelsea Square, London, SW3 6LF

  CON/26/01382 Submitted 11 Mar 2026 0m away

  Details required by Condition 3 (timber screening) of planning permission PP/25/02407 (Installation of air conditioning units, and retention of timber screen fence and doors with sidelights on second floor roof terrace)

  Granted Conditions 8 docs
  Small domestic

• CL/26/01267 Granted

  1 Bray Place, London, SW3 3LL

  Confirmation that the existing structure at no. 27 Coulson Street / 1 Bray Place was built in the early 1970s as a single development over three floors (basement to first floor) after the demolition of a previous infill building in 1971 (Certificate of Lawful Existing Use)

  9 Mar 2026 Lawful development
• CL/26/02700 Granted

  27 Lansdowne Road, London, W11 3AG

  Provision of lead flashing to parapet/cornice lines and painting of windows and existing painted areas of the building in soft white (Certificate of Proposed Use/Development).

  19 May 2026 Lawful development
• CL/26/02515 Granted

  Flats A and C, 61 Holland Park, London, W11 3SJ

  Reconfiguration of the accommodation at Flat A and Flat C to create one four-bed dwelling and one one-bed dwelling (Certificate of Lawful Proposed Development / Use)

  6 May 2026 Lawful development
• CL/26/03998 Awaiting decision

  87 Addison Road, London, W14 8ED

  Confirmation that the existing A/C Units & Screening to the north and south sides on the flat roofs at ground and first floor levels are lawful (Certificate of Lawful Existing Use/Development)

  23 Jul 2026 Lawful development
• CL/26/04000 Awaiting decision

  191 Freston Road, London, W10 6TH

  Confirmation that the use of the property as Class F1(a) (Education) is lawful (Certificate of Lawful Existing Use/Development)

  23 Jul 2026 Lawful development