Planning application
25/09300/FULL
39 Wilton Crescent London SW1X 8RX
Proposal
Erection of closet wing from lower ground to third floor; demolition and reconstruction of existing rear two storey extension at lower ground and ground floor level; erection of balcony and french doors at rear ground floor level; alterations at roof level in association with its use as a terrace; installation of plant equipment within enclosures at roof level and to rear; extension of lift to fourth floor; excavation of basement under rear courtyard, infill courtyard extension with terrace in association with use of building as single dwelling.
As published by the council, reference 25/09300/FULL
Timeline
Dates from the published record
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23 Dec 2025
Received by Westminster
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28 Jan 2026
Validated
Checked as complete and ready for consideration.
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19 May 2026
Decision issued: Application Permitted
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20 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
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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25/05984/FULL Granted
39 Wilton Crescent London SW1X 8RX
Variation of Condition 1 of planning permission dated 23 February 2016 (RN: 15/08955/FULL) for the: 'Erection of closet wing from lower ground to third floor to accommodate lift. Demolition and reconstruction of existing rear two storey extension at lower ground and ground floor level. Erection of balcony and French doors at rear ground floor level. Alterations at roof level in association with its use as a terrace. Installation of plant equipment within an enclosure at roof level. Excavation of basement under rear courtyard'. Namely, retention of existing lift shaft, modifications to fenestration arrangement on rear, increase in height of two storey rear extension.
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25/09301/LBC Granted
39 Wilton Crescent London SW1X 8RX
Erection of closet wing from lower ground to third floor; demolition and reconstruction of existing rear two storey extension at lower ground and ground floor level; erection of balcony and french doors at rear ground floor level; alterations at roof level in association with its use as a terrace; installation of plant equipment within enclosures at roof level and to rear; extension of lift to fourth floor; excavation of basement under rear courtyard, infill courtyard extension with terrace in association with use of building as single dwelling.
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25/05985/FULL Withdrawn
39 Wilton Crescent London SW1X 8RX
Erection of closet wing from lower ground to third floor; demolition and reconstruction of existing rear two storey extension at lower ground and ground floor level; erection of balcony and French doors at rear ground floor level; alterations at roof level in association with its use as a terrace; installation of plant equipment within an enclosure at roof level and an MVHR unit in the rear courtyard; extension of existing lift to fourth floor; and excavation of basement under rear courtyard, infill courtyard extensionand works to front and rear elevations in association with use of building as single dwelling. (Linked with 25/05986/LBC)
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25/05986/LBC Withdrawn
39 Wilton Crescent London SW1X 8RX
Erection of closet wing from lower ground to third floor; demolition and reconstruction of existing rear two storey extension at lower ground and ground floor level; erection of balcony and French doors at rear ground floor level; alterations at roof level in association with its use as a terrace; installation of plant equipment within an enclosure at roof level and an MVHR unit in the rear courtyard; extension of existing lift to fourth floor; and excavation of basement under rear courtyard, infill courtyard extension and works to front and rear elevations in association with use of building as single dwelling. (Linked with 25/05985/FULL)
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25/05991/FULL Granted
39 Wilton Crescent London SW1X 8RX
Erection of rooftop plant enclosure behind dummy mansard including new terrace with new stone paving; access stair with glazed access hatch; two flush walk-on rooflights; extension of mansard to front elevation to form parapet and conceal terrace; balustrade to rear elevation; raising of party wall to front of No. 40; replacement of all existing AV and satellite antennas; new security CCTV camera overlooking the access hatch.
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25/05992/LBC Granted
39 Wilton Crescent London SW1X 8RX
Erection of rooftop plant enclosure behind dummy mansard including new terrace with new stone paving; access stair with glazed access hatch; two flush walk-on rooflights; extension of mansard to front elevation to form parapet and conceal terrace; balustrade to rear elevation; raising of party wall to front of No. 40; replacement of all existing AV and satellite antennas; new security CCTV camera overlooking the access hatch.
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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
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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.