4 - 5 Cavendish Mews North London W1W 6LA

This site has had 4 applications since 2025: 4 approved, 0 refused.

• 26/00516/NMA Granted

  4 - 5 Cavendish Mews North London W1W 6LA

  Amendments to planning permission dated 12th June 2024 (RN 24/00473/FULL) for the erection of a roof extension and alterations to the front elevation to enlarge and alter residential dwelling (Class C3). NAMELY, roof extension reprofiling.

  Decided 30 Mar 2026 Amendments
• 25/08472/ADFULL Granted

  4 - 5 Cavendish Mews North London W1W 6LA

  Details of windows, rooflights and balustrades detailing pursuant to condition 2 of planning permission dated 12 June 2024 (RN:24/00473/FULL)

  Decided 9 Mar 2026 Full applications
• 25/06141/NMA Granted

  4 - 5 Cavendish Mews North London W1W 6LA

  Amendments to planning permission dated 12th June 2024 (RN:24/00473/FULL) for Erection of a roof extension and alterations to the front elevation to enlarge and alter residential dwelling (Class C3) namely, the repositioning of windows to function as a skylight within the second floor mansard roof, the northernmost rooflight to be repositioned to serve as a secondary means of escape, the northernmost window at first floor level to be reconfigured to match the positioning of the existing surveyed windows and the omission of two rooflights.

  Decided 22 Sep 2025 Amendments

1. 26 Nov 2025

   Received by Westminster

2. 30 Mar 2026

   Decision issued: Application Permitted

3. 20 Jul 2026

   Added to PlanIndex

Westminster granted permission on 30 March 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 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.

• 4 - 5 Cavendish Mews North London W1W 6LA

  26/00516/NMA Submitted 29 Jan 2026 50 yards away

  Amendments to planning permission dated 12th June 2024 (RN 24/00473/FULL) for the erection of a roof extension and alterations to the front elevation to enlarge and alter residential dwelling (Class C3). NAMELY, roof extension reprofiling.

  Granted Amendments Extension 15 docs
  Domestic

• 4 - 5 Cavendish Mews North London W1W 6LA

  25/06141/NMA Submitted 28 Aug 2025 50 yards away

  Amendments to planning permission dated 12th June 2024 (RN:24/00473/FULL) for Erection of a roof extension and alterations to the front elevation to enlarge and alter residential dwelling (Class C3) namely, the repositioning of windows to function as a skylight within the second floor mansard roof, the northernmost rooflight to be repositioned to serve as a secondary means of escape, the northernmost window at first floor level to be reconfigured to match the positioning of the existing surveyed windows and the omission of two rooflights.

  Granted Amendments Extension Loft or dormer +1 13 docs
  Domestic

• 4 - 5 Cavendish Mews North London W1W 6LA

  25/08472/ADFULL Submitted 19 Nov 2025 50 yards away

  Details of windows, rooflights and balustrades detailing pursuant to condition 2 of planning permission dated 12 June 2024 (RN:24/00473/FULL)

  Granted Full applications Loft or dormer Windows or glazing 40 docs

• 46 Portland Place London W1B 1NF

  26/02183/CLEUD Submitted 1 Apr 2026 50 yards away

  86% historically approved · decision due ~27 May

  Confirmation on planning permission have been lawfully implemented by carrying out a material operation at the site, in accordance with the approved plans (Variation of condition 1 of planning permission dated 29 April 2016 (RN 14/12563/FULL) for the demolition of the rear extension to the building at lower ground, mezzanine, ground and first floor levels and rebuilding to include the creation of a terrace at rear first floor level. Excavation of additional basement levels and installation of plant at main roof and basement level all in association with the use of the property as a single family dwelling (Class C3) from RN 14/12563/FULL. NAMELY, to vary the approved drawings to enable additional excavation at basement levels, installation of photovoltaics at roof level, enlargement of the openings at ground and first floors, to change a window to a door to provide access to the terrace at rear first floor level and to alter the fenestration of the front elevation to the orangery with internal alterations at all floor levels)

  Awaiting decision Lawful development Extension Demolition +1 14 docs
  Domestic

• 46 Portland Place London W1B 1NF

  26/04128/LBC Submitted 23 Jun 2026 50 yards away

  90% historically approved · decision due ~18 Aug

  Internal alterations to the rear of the first floor, comprising the removal of non-original partitions, fixtures, fittings and doors associated with the existing WC/shower block and kitchen within the closet wing, together with the removal of suspended ceilings to reinstate original ceiling heights in the principal rooms. The works include the installation of a new WC and tea point with associated partitioning, and the formation of a new opening between the library/study and rear seating area, detailed with matching cornices and skirtings to respect the historic character and fabric of the building.

  Awaiting decision Heritage and listed buildings

• 46 Portland Place London W1B 1NF

  26/05632/FULL Submitted 18 Aug 2026 50 yards away

  87% historically approved · decision due ~19 Oct

  New dormer windows, replacement of all non-original windows, previously proposed windows and relevant external glazed doors with new painted windows and new glazed painted external doors that encompass vacuum glazing together with reinstatement of suitable joinery profiles throughout. (Linked with 26/04113/LBC)

  Awaiting decision Full applications Loft or dormer Windows or glazing

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront with Medication Dispensing Outlet.

  Received 15 Sep, published by the council 17 Sep 2026 Full applications
• 26/06297/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.

  Received 15 Sep, published by the council 17 Sep 2026 Full applications
• 26/06294/FULL Awaiting decision

  15 Eaton Mews South London SW1W 9HP

  Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

  Received 15 Sep, published by the council 22 Sep 2026 Full applications
• 26/06317/FULL Awaiting decision

  124 Hamilton Terrace London NW8 9UT

  Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

  Received 15 Sep, published by the council 22 Sep 2026 Full applications
• 26/06273/FULL Awaiting decision

  9A Grosvenor Square London W1K 5AE

  Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

  Received 14 Sep, published by the council 22 Sep 2026 Full applications