Planning application
26/01368/FULL
40 Eaton Square London SW1W 9DA
Proposal
Construction of freestanding garden room within rear garden (linked to 26/01369/LBC)
As published by the council, reference 26/01368/FULL
Timeline
Dates from the published record
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4 Mar 2026
Received by Westminster
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9 Mar 2026
Validated
Checked as complete and ready for consideration.
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21 Jul 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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26/02269/TPO Awaiting decision
Trees In Eaton Square London SW1W 9DA
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.
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26/02474/LBC Awaiting decision
Flat 4 6 Eaton Square London SW1W 9DA
Installation of secondary glazing to flat four front elevation at second floor level.
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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)
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25/09306/TCA Granted
Trees In Eaton Square London SW1W 9DA
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.
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25/08913/TCA Granted
Trees In Eaton Square London SW1W 9DA
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.
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26/02595/TPO Awaiting decision
Trees In Eaton Square London SW1W 9DA
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
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26/04824/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Detailed design and specification of new blinds to NZH based on mock-up trials on-site. pursuant to condition 32 (i) of planning permission dated 8th April 2024 (23/00571/FULL).
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26/04829/ADFULL Granted
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Details of external and internal signage strategy pursuant to Condition 33(E) of planning permission dated 8th April 2024 (RN: 23/00571/FULL)
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26/04841/ADFULL Granted
29 Henstridge Place London NW8 6QD
Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.