40 Eaton Square London SW1W 9DA

This site has had 2 applications since 2026.

• 26/01369/LBC Awaiting decision

  40 Eaton Square London SW1W 9DA

  Construction of a freestanding garden room within rear garden (linked to 26/01368/FULL)

  Submitted 4 Mar 2026 Heritage and listed buildings

1. 4 Mar 2026

   Received by Westminster

2. 9 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 4 May 2026, 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 65 days over the applications it decided in the last year.

• 26/01369/LBC Awaiting decision

  40 Eaton Square London SW1W 9DA

  Construction of a freestanding garden room within rear garden (linked to 26/01368/FULL)

  Submitted 4 Mar 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/01369/LBC Awaiting decision

  40 Eaton Square London SW1W 9DA

  Construction of a freestanding garden room within rear garden (linked to 26/01368/FULL)

  Submitted 4 Mar 2026 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 89 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.

• Trees In Eaton Square London SW1W 9DA

  26/02269/TPO Submitted 7 Apr 2026 0m away

  100% historically approved · decision due ~2 Jun

  T230 - Platanus x hispanica (London Plane): Reduce faulted limb(s) - reducing the lowest limb to the north (attached at around 4 m) by approximately 7 m, retaining the two prominant branches (attached at around 2.5 and 3.5 m out from the primary union), due to significant decay and hollowing evidenced during recent decay investigations (see attached report). The second branch from the main union (at around 3.5 m), ascends and should form the new terminal section of the limb. Both retained branches should be left intact.

  Awaiting decision Trees 10 docs

• Flat 4 6 Eaton Square London SW1W 9DA

  26/02474/LBC Submitted 15 Apr 2026 0m away

  90% historically approved · decision due ~10 Jun

  Installation of secondary glazing to flat four front elevation at second floor level.

  Awaiting decision Heritage and listed buildings Windows or glazing 7 docs

• 40 Eaton Square London SW1W 9DA

  26/01369/LBC Submitted 4 Mar 2026 0m away

  90% historically approved · decision due ~4 May

  Construction of a freestanding garden room within rear garden (linked to 26/01368/FULL)

  Awaiting decision Heritage and listed buildings 6 docs

• Trees In Eaton Square London SW1W 9DA

  25/09306/TCA Submitted 23 Dec 2025 0m away

  1 x London plane (T228): Reduce the height of all apical stems in the upper crown by approximately 2m. 1 x London plane (T230): Remove Massaria limb with horizontal cracking at 6m above ground level.

  Granted Trees 9 docs

• Trees In Eaton Square London SW1W 9DA

  25/08913/TCA Submitted 8 Dec 2025 0m away

  2 x London planes (T889 and T892): Reduce crown by specified extent - reducing the tips of the lower and mid lateral branches over the road, to the most recent previous reduction points or suitable growth points no closer to the tree than in line with the centre of the carriageway. Retain selected furnishing growth at pruning points to maintain a flowing canopy outline and to minimise visual impact. Maximum diameter of final cuts to be no greater than 4 cm.

  Granted Trees 7 docs

• Trees In Eaton Square London SW1W 9DA

  26/02595/TPO Submitted 20 Apr 2026 0m away

  100% historically approved · decision due ~15 Jun

  London Planes: T192: Massaria Climbing Inspection Report shows early stage Massaria on a large lower limb and developed Massaria on large upper crown limb removal required. T229: Massaria Climbing Inspection report shows early stage Massaria on a large limb removal required. T370: RVL necessary 3 months - large branch at 15m SE approx. 8m in length and 300mm in diameter. T381: RVL necessary 3 months - Massaria large limb at 8m SW approx. 10m out on lateral limb 6m in length, 200mm diameter, Also large limb at 7m NW 4.5m, 200mm in diameter, Also large limb at 16m NW over road 4m length, 200mm diameter T721: RVL necessary 3 months - Massaria limb at 9m, S, 5m length and approx 300mm diameter T728: RS00 necessary 3 months ? heavily reduce the large Massaria affected limb at 7m NE (the end of the long lateral branch alongside the pavement) by approx. 3.5 m to reduce loading and stabilise the limb allowing for further monitoring to evaluate the extent of development. T743: RS00 necessary 3 months ? reducing the extended terminal branches on the limb with the cavity at 15m to the west, and the large branch at 15m NE 150mm diameter, by approximately 2 m, to reduce loading on the decayed limb cavities, to minimise the potential for major limb failure within the garden square. T889: RL00 necessary 3 months ? reducing the terminal branches growing from the large limb at 10m N (with a cavity within the wound) 8m length 150mm, by approx. 2 m to reduce loading and minimise the potential for limb failure due to decay and cavities present. T921: RVL necessary 3 months - Large branch at 7m NE 4m in length and 450mm diameter attached beneath main union of tree. T959: RVL necessary 3 months - large Massaria limb at 12m SW 8m length and 300mm diameter

  Awaiting decision Trees 27 docs

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront.

  15 Sep 2026 Full applications
• 26/06297/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

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

  15 Sep 2026 Full applications
• 26/06234/FULL Awaiting decision

  40 Grosvenor Place London SW1X 7HJ

  Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

  11 Sep 2026 Full applications
• 26/06249/FULL Awaiting decision

  53 Wimpole Street London W1G 8YH

  Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06250/LBC)

  11 Sep 2026 Full applications
• 26/03576/FULL Decided

  15A Devonshire Terrace London W2 3DW

  Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

  1 Jun 2026 Full applications