Third Floor, 17 Powis Mews, London, W11 1JN

This site has had 2 applications since 2025: 1 approved, 0 refused.

• CL/25/06909 Granted

  Third Floor, 17 Powis Mews, London, W11 1JN

  Installation of Air Source Heat Pump to replace existing electrical hot water heating system (Certificate of Lawful Proposed Development/Use).

  Decided 10 Apr 2026 Lawful development

1. 17 Nov 2025

   Received by Kensington and Chelsea

2. 20 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 12 January 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 lawful development applications in a median of 100 days. More in our guide to how long planning decisions take.

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.

• 4-5 Powis Mews, London, W11 1JN

  PP/21/03233 Submitted 18 May 2021 0m away

  Covering of existing roof terrace with a glass structure.

  Refused Full applications 10 docs

• Third Floor, 17 Powis Mews, London, W11 1JN

  CL/25/06909 Submitted 17 Nov 2025 0m away

  Installation of Air Source Heat Pump to replace existing electrical hot water heating system (Certificate of Lawful Proposed Development/Use).

  Granted Lawful development 12 docs

• 114 Talbot Road, London, W11 1JR

  PP/26/02660 Submitted 13 May 2026 42m away

  94% historically approved · decision due ~8 Jul

  Replacement of sash windows with heritage style double glazed sash units which closely match the existing style, colour and profile of the existing units

  Awaiting decision Full applications Windows or glazing 23 docs

• Basement Flat, 17-19 Powis Terrace, London, W11 1JJ

  CL/26/03083 Submitted 11 Jun 2026 43m away

  Confirmation that the use of the lower ground floor at 17 Powis Terrace as offices within Class E, as part of the wider RCW office premises, is lawful. (Certificate of existing use).

  Granted Lawful development 8 docs

• Flat 16A, Hedgegate Court, Powis Terrace, London, W11 1JD

  PP/26/01893 Submitted 19 Mar 2026 51m away

  The installation of replacement windows and doors to the front and rear elevations.

  Granted Full applications Windows or glazing 18 docs

• 18-22 Powis Terrace, London, W11 1JH

  PP/25/04589 Submitted 22 Jul 2025 60m away

  Change of use of residential annexe to provide a separate dwelling; installation of air source heat pump and additional rooftop photovoltaic solar panels.

  Granted Full applications 41 docs
  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