Planning application
P/2026/1372
115 Roxborough Avenue, Isleworth, TW7 5HH
Proposal
Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and front roof windows to the house.
As published by the council, reference P/2026/1372
Timeline
Dates from the published record
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6 May 2026
Received by Hounslow
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1 Jul 2026
Decision issued: GRANT
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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 lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
-
P/2024/3127 Granted
30 Albury Avenue, Isleworth, TW7 5HX
Conversion of garage into habitable room and replacement of garage door with window.
-
PA/2021/2819 Refused
56 SYON PARK GARDENS, ISLEWORTH, TW7 5ND
Ground floor rear extension 6.00 metres deep, maximum height of 3.20 metres, 3.00 metres high to the eaves
-
P/2021/2313 Granted
44 ALBURY AVENUE, ISLEWORTH, TW7 5HX
Erection of a shed in front garden
-
P/2026/2047 Awaiting decision
9 Borough Road, Isleworth, TW7 5DY
Erection of a single storey rear extension.
-
P/2021/2135 Granted
48 ALBURY AVENUE, ISLEWORTH, TW7 5HX
Certificate of Lawfulness for the erection of a hip to gable and rear roof extension with two front roof windows to the house
-
P/2023/0288 Granted
LANCASTER HOUSE BOROUGH ROAD, ISLEWORTH, TW7 5FJ
Work to tree within conservation area Maple (T1) - Whole crown reduction to a height of approximately 13m from ground
Other lawful development applications
In Hounslow
-
P/2026/2219 Awaiting decision
Great West House,993 Great West Road,Brentford,TW8 9DF
Certificate of lawfulness for the installation of two electricity substations.
-
P/2026/1626 Granted
2 Oak Avenue, Hounslow, TW5 9EB
Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and the addition of one front roof light.
-
P/2026/2168 Awaiting decision
49 Durham Road, Feltham, TW14 0AG
Certificate of lawfulness for the proposed erection of a detached outbuilding in the rear garden.
-
P/2026/1448 Granted
13 Orchard Avenue, Hounslow, TW5 0DU
Certificate of lawfulness for the proposed erection of a rear roof extension with a hip to gable conversion to the house.
-
P/2026/1682 Granted
133 Swan Road, Feltham, TW13 6LT
Certificate of lawfulness for the proposed erection of a rear roof extension with front roof windows to the house.