Planning application
P/2026/1437
17 Crowntree Close, Isleworth, TW7 5PF
Proposal
Certificate of lawfulness for the proposed erection of a rear roof extension with front roof windows to the house.
As published by the council, reference P/2026/1437
Timeline
Dates from the published record
-
12 May 2026
Received by Hounslow
-
3 Jul 2026
Decision issued: LAWFNOTGRANT
-
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/2026/1455 Granted
17 Crowntree Close, Isleworth, TW7 5PF
Erection of a single-storey side and rear infill extension, and a front porch extension.
-
P/2026/2151 Awaiting decision
17 Crowntree Close, Isleworth, TW7 5PF
Erection of a side roof extension with three roof windows on the other side of the house
-
P/2025/3031 Withdrawn
1 Wyke Close, Isleworth, TW7 5PE
Please find the proposed work to be carried out in Wyke Close and the surrounding area T1/T2 Silver Birch - reduce and shape canopy by 2 metres T4/T5/T6/T7 Common Lime - reduce and reshape by 2 metres and lift canopy to give 4 metres ground clearance for pathway and road T12 Holm Oak - reduce and shape canopy by 1.5 metres T16 Silver Birch- fell to ground level T22 Sweet Chestnut- remove major deadwood in canopy T30 Plum- Prune away from number 8s garden to give clearance and shape remainder of canopy by approximately 2 metres T32/T33/T34 Horse Chestnut/Common Lime- remove epicormic up to crown break T58 Holm Oak - reduce and shape canopy by 2 metres and heavily trim ivyunderneath T65 Common Lime - remove epicormic growth on stem to height of 4 metres T68 Sycamore - remove saplings either side of main stem T73 English Oak- remove all of major deadwood and prune back branches extending over pathway by approximately 2 metres T76/T77 English Oak - removal of major deadwood and reduce cano... read more
-
P/2026/1884 Granted
Stags Way, Isleworth, TW7 5PQ
5-day tree notification to fell Lime T8 (T199 on supplied survey plan) within TPO order number 64 and in communal green space.
-
P/2021/2987 Refused
185 SYON LANE, ISLEWORTH, TW7 5PU
Certificate of lawfulness for erection of rear roof extension and two front rooflights.
-
P/2026/1413 Granted
191 Syon Lane, Isleworth, TW7 5PU
Works to tree in a Conservation Area. Removal of 1 X Magnolia tree which is located within the boundary.
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.