6 Eccleston Square London SW1V 1NP

This site has had 2 applications since 2025.

• 25/07423/LBC 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 25/07422/FULL)

  Submitted 14 Oct 2025 Heritage and listed buildings

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.

• 25/07423/LBC 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 25/07422/FULL)

  Submitted 14 Oct 2025 Heritage and listed buildings

1 later application on the register refers to this one:

• 25/07423/LBC 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 25/07422/FULL)

  Submitted 14 Oct 2025 Heritage and listed buildings

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 91 days. More in our guide to how long planning decisions take.

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.

• 6 Eccleston Square London SW1V 1NP

  25/07423/LBC Submitted 14 Oct 2025 50 yards away

  90% 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 25/07422/FULL)

  Awaiting decision Heritage and listed buildings Extension Loft or dormer +3 39 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

• 26/06295/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