Planning application
P/2025/3644
Mulliner House, Flanders Road, Chiswick, London, W4 1NN
Proposal
Erection of a single storey side extension and an additional floor at roof level with a roof terrace, relocation of the entrance and alterations to the façade, enclosure of the basement car park to create swimming pools with landscaping, plants and associated works
As published by the council, reference P/2025/3644
Timeline
Dates from the published record
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8 Dec 2025
Received by Hounslow
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18 Dec 2025
Validated
Checked as complete and ready for consideration.
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24 Jul 2026
Decision issued: APPROVED
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26 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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P/2021/2577 Granted
MULLINER HOUSE FLANDERS ROAD, CHISWICK, W4 1NN
T1 Norway Maple. Crown reduce close to previous prune points. Height reduce 2m Spread 1.5m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. T2 Norway Maple. Crown reduce close to previous prune points. Height reduce 2m Spread max 1m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. T3 Norway Maple (red). Crown reduced by 30%. Height reduce 3m Spread 2m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. T4 Norway Maple. Crown reduced by 30%. Height reduce 2m Spread 1.5m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. Reason for works. To maintain the trees at no larger than the present size.
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P/2026/1924 Awaiting decision
4 Flanders Road, Chiswick, London, W4 1NG
Erection of a side and rear dormer with a front and rear solar tube to the house, and increase in height of the existing outbuilding and installation of a pergola.
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P/2026/1494 Awaiting decision
2 Bath Road, Chiswick, London, W4 1LW
Demolition of the single-storey rear extension, installation of temporary scaffolding to the façade of the building, installation of associated plant equipment, an external condenser unit and acoustic shelter. Internal layout alterations and installation of secondary glazing, external alterations including re-rendering to allow continued use under Class E
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P/2026/1371 Awaiting decision
2 Bath Road, Chiswick, London, W4 1LW
Listed building permission for demolition of the single-storey rear extension, installation of temporary scaffolding to the façade of the building, installation of associated plant equipment, an external condenser unit and acoustic shelter. Internal layout alterations and installation of secondary glazing, external alterations including re-rendering to allow continued use under Class E
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P/2024/3176 Decided
1 First Floor Left, Priory Gardens,Chiswick,London,Hounslow,W4 1TT
Works to tree within a conservation area: T1: Twin-stemmed Gleditsia - fell in sections to ground level.
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P/2026/1785 Awaiting decision
Flat 2 and 3, 96 Thornton Avenue, Chiswick ,London, W4 1QQ
Retrospective conversion of first and second floor flats into one self-contained flat.
Other full applications applications
In Hounslow
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P/2026/2210 Awaiting decision
4 Crane Avenue, Isleworth, TW7 7JL
Erection of a part single storey rear extension to the house of occupation.
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P/2026/1729 Granted
Blenheim Place, Flat 15, Steve Biko Way,Hounslow,TW3 3ED
Installation of two rear roof windows to the flat
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P/2026/0725 Refused
Unit 6 Worton Hall Industrial Estate, Worton Road, Isleworth, TW7 6ER
Retrospective application for the installation of two stacked storage containers in two locations
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P/2026/2180 Awaiting decision
50 Barrowgate Road, Chiswick, London, W4 4QY
Formation of vehicular access to the flats
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P/2026/1694 Refused
Oxbridge Court Oxford Road North Chiswick London Hounslow W4 4DP
Erection of a fourth floor level comprising of six self contained units with associated cycle and refuse storage.