6 Eccleston Square London SW1V 1NP

This site has had 2 applications since 2025.

• 25/07422/FULL Awaiting decision

  6 Eccleston Square London SW1V 1NP

  Full refurbishment of Flat 6 involving the demolition of the existing modern mansard roof and dormers at 4th level, and of the terrace above the 4th Floor and creation of a new roof with a sunk terrace, recessed from both elevations, in the middle section of the roof, insertion of a hinged sky door fit in the roof and creation of an internal stair for accessing the roof terrace, layout improvement of the 4th floor with minor alterations of the bedrooms configuration and the enlargement of existing bathroom, with the provision of a skylight about the bath/ shower area, vertical extension of the existing cantilevered rear extension, with the creation of a new rear extension volume above, partially covering the existing rear extension, housing a shower area and improvement of existing WC on the landing in between the 3rd and 4th floors; layout optimization of the 3rd floor and renewal of the existing modern double-glazing windows with new like to like timber, slim line double glazed conservation windows and installation of ASHP heat pump. (Linked to 25/07423/LBC)

  Submitted 14 Oct 2025 Full applications

1. 14 Oct 2025

   Received by Westminster

2. 30 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 25 December 2025, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 66 days over the applications it decided in the last year.

• 25/07422/FULL Awaiting decision

  6 Eccleston Square London SW1V 1NP

  Full refurbishment of Flat 6 involving the demolition of the existing modern mansard roof and dormers at 4th level, and of the terrace above the 4th Floor and creation of a new roof with a sunk terrace, recessed from both elevations, in the middle section of the roof, insertion of a hinged sky door fit in the roof and creation of an internal stair for accessing the roof terrace, layout improvement of the 4th floor with minor alterations of the bedrooms configuration and the enlargement of existing bathroom, with the provision of a skylight about the bath/ shower area, vertical extension of the existing cantilevered rear extension, with the creation of a new rear extension volume above, partially covering the existing rear extension, housing a shower area and improvement of existing WC on the landing in between the 3rd and 4th floors; layout optimization of the 3rd floor and renewal of the existing modern double-glazing windows with new like to like timber, slim line double glazed conservation windows and installation of ASHP heat pump. (Linked to 25/07423/LBC)

  Submitted 14 Oct 2025 Full applications

1 later application on the register refers to this one:

• 25/07422/FULL Awaiting decision

  6 Eccleston Square London SW1V 1NP

  Full refurbishment of Flat 6 involving the demolition of the existing modern mansard roof and dormers at 4th level, and of the terrace above the 4th Floor and creation of a new roof with a sunk terrace, recessed from both elevations, in the middle section of the roof, insertion of a hinged sky door fit in the roof and creation of an internal stair for accessing the roof terrace, layout improvement of the 4th floor with minor alterations of the bedrooms configuration and the enlargement of existing bathroom, with the provision of a skylight about the bath/ shower area, vertical extension of the existing cantilevered rear extension, with the creation of a new rear extension volume above, partially covering the existing rear extension, housing a shower area and improvement of existing WC on the landing in between the 3rd and 4th floors; layout optimization of the 3rd floor and renewal of the existing modern double-glazing windows with new like to like timber, slim line double glazed conservation windows and installation of ASHP heat pump. (Linked to 25/07423/LBC)

  Submitted 14 Oct 2025 Full applications

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 94 days. More in our guide to how long planning decisions take.

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

• 6 Eccleston Square London SW1V 1NP

  25/07422/FULL Submitted 14 Oct 2025 50 yards away

  87% historically approved · decision due ~25 Dec

  Full refurbishment of Flat 6 involving the demolition of the existing modern mansard roof and dormers at 4th level, and of the terrace above the 4th Floor and creation of a new roof with a sunk terrace, recessed from both elevations, in the middle section of the roof, insertion of a hinged sky door fit in the roof and creation of an internal stair for accessing the roof terrace, layout improvement of the 4th floor with minor alterations of the bedrooms configuration and the enlargement of existing bathroom, with the provision of a skylight about the bath/ shower area, vertical extension of the existing cantilevered rear extension, with the creation of a new rear extension volume above, partially covering the existing rear extension, housing a shower area and improvement of existing WC on the landing in between the 3rd and 4th floors; layout optimization of the 3rd floor and renewal of the existing modern double-glazing windows with new like to like timber, slim line double glazed conservation windows and installation of ASHP heat pump. (Linked to 25/07423/LBC)

  Awaiting decision Full applications Extension Loft or dormer +3 49 docs

• 1D Eccleston Square London SW1V 1NP

  26/01575/LBC Submitted 11 Mar 2026 50 yards away

  90% historically approved · decision due ~21 May

  Installation of four replacement timber sash windows within mansard roof storey.

  Awaiting decision Heritage and listed buildings Loft or dormer Windows or glazing 16 docs

• 9 Eccleston Square London SW1V 1NP

  26/02081/ADLBC Submitted 30 Mar 2026 50 yards away

  90% historically approved · decision due ~25 May

  Details of stucco repair method statement pursuant to condition 4 of listed building consent dated 7th October 2025 (RN: 25/06030/LBC).

  Awaiting decision Conditions 4 docs

• Flat 2 5 Eccleston Square London SW1V 1NP

  26/00686/LBC Submitted 5 Feb 2026 50 yards away

  90% historically approved · decision due ~2 Apr

  Replacement of roof and rooflights to rear closet wing at first floor level with associated raising of existing parapet.

  Awaiting decision Heritage and listed buildings Loft or dormer 17 docs

• Flat 2 5 Eccleston Square London SW1V 1NP

  26/00685/FULL Submitted 5 Feb 2026 50 yards away

  87% historically approved · decision due ~2 Apr

  Replacement of roof and rooflights to rear closet wing at first floor level with associated raising of existing parapet.

  Awaiting decision Full applications Loft or dormer 21 docs

• 1D Eccleston Square London SW1V 1NP

  26/02019/FULL Submitted 26 Mar 2026 50 yards away

  87% historically approved · decision due ~21 May

  Installation of four replacement timber sash windows within mansard roof storey.

  Awaiting decision Full applications Loft or dormer Windows or glazing 15 docs

• 26/04878/LBC Decided

  34 Grosvenor Street London W1K 4QU

  Internal works to facilitate the subdivision of 34 Grosvenor Street and 3 Three Kings Yard

  Received 21 Jul, published by the council 1 Aug 2026 Heritage and listed buildings
• 26/06299/LBC Awaiting decision

  Apartment 33 24 Park Crescent London W1B 1AA

  Alterations to internal partitions, door openings, doors and floor finishes.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/06305/LBC Awaiting decision

  33A Dean Street London W1D 4PP

  Installation of new concrete slab with drainage channels at basement level and new fire surround in B.01.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/06318/LBC 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 26/06317/FULL)

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/04141/LBC Decided

  80E Randolph Avenue London W9 1BG

  Replacement of sashes in two front windows at 2nd floor level and one rear window with slimline double glazed timber sashes. (Linked with 26/04142/FULL)

  Received 23 Jun, published by the council 21 Jul 2026 Heritage and listed buildings