Planning application
P/2025/0069
299-303,Chiswick High Road,Chiswick,W4 4HH
Proposal
Erection of new mansard roof extension across the second floor roof of the main building to accommodate two new self contained flats. A part first floor extension to an existing flat and part ground floor rear extension to the commercial unit to the rear of the property.
As published by the council, reference P/2025/0069
Timeline
Dates from the published record
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9 Jan 2025
Received by Hounslow
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26 Jul 2026
Added to PlanIndex
What withdrawal means
The process from here
The applicant withdrew this application before the council decided it, so it carries no planning weight and no fee refund is automatic. Withdrawal often follows officer feedback that a refusal was likely.
The applicant is free to submit a revised application at any time, and many withdrawn schemes return in amended form, so the site is worth watching if the proposal affected you.
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/2026/0509 Awaiting decision
299-303 Chiswick High Road, Chiswick, London, W4 4HH
Variation of condition 3 (opening hours) to allow the addition of one hour to the opening hours of the basement, 0900-0100 on Sundays to Thursdays and 0900-0230 on Fridays and Saturdays for 12 months of planning permission P/2025/1945 approved 07/11/2025 for the retrospective application for the change of use of the existing food takeaway business and restaurant into a lounge bar on the basement floor and restaurant on the ground floor of 299 to 303 Chiswick High Road.
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P/2024/3016 Refused
303 Flat First Floor,Chiswick High Road,Chiswick,London,W4 4HH
Change of use from the existing self-contained flat on the first floor into a House in Multiple Occupation (HMO) for up to five people
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P/2026/1022 Awaiting decision
462A - 464A Chiswick High Road, Chiswick, London, W4 5TT
Erection of a mansard roof extension comprising of four self contained flats with associated solar panels, cycle and refuse storage.
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P/2021/2364 Granted
1 ARLINGTON COTTAGES SUTTON LANE NORTH, CHISWICK, LONDON, W4 4HB
T1 Ash Tree Remove; T2 Leyland Cypress Remove; T3 Lime Tree Remove; T4 - T11 Leyland Cypress Remove Excessive shading, part of relandscaping plan; T12 Oak Tree Shorten heavy, lowest, southern most branch to first growth point (approx. 8m reduction of branch). Reduce remaining crown by 20% (shorten branches by 1-2m) Remove dead wood. Prudent periodic management of large tree close to new build house. Excessive shading; T13 Magnolia Lift crown on west side to 2.5. to avoid damage to tree during building works
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P/2021/2356 Granted
1 ARLINGTON COTTAGES SUTTON LANE NORTH, CHISWICK, LONDON, W4 4HB
Details of Condition 16 (No excavation or construction work) submitted pursuant to planning permission 01094/H1/P6 dated 16/11/2020 for the variation of condition 2 (approved plans) to allow for amendments to the scheme including lowering the garden level by 900mm to the northern side, removing the change in level in the basement, deepening the basement, and allowing for minor alterations to the elevations and addition / repositioning of rooflights, following planning permission 01094/H1/P4 dated 12/09/2019 for variation of condition 2 to allow for amendments to the new house including alteration to the building envelope with building footprint, alteration to the lightwells including insertion of glazed roof, insertion of a roof light, and design amendments including altered fenestration (with listed building consent P/2019/2635) following planning permission 01094/H/P3 dated 12/4/2019 for erection of a 3-bedroom house in grounds of 1 Arlington Cottage with associated cycle and bin sto... read more
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P/2021/1964 Granted
FLAT 7 OLD TIMBER COURT ACTON LANE, CHISWICK, W4 5JQ
Construction of third floor extension to Flat 7, Creation of new flat above and across the main part of building through roof extension at fourth floor level, with roof terrace to both flats. Additional bin and cycle storage and alterations to existing cycle store including new roof and security measures.
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.