Planning application
20 Chestnut Grove, Isleworth, TW7 7EZ
Works: Extension Loft or dormer Windows or glazing
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
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/2026/0319
Application record
- Reference
- P/2026/0319
- Type
- Lawful Development Certificate (Proposed)
- Status
- Decided: GRANT
- Decision
- GRANT
- Received
- 3 Feb 2026
- Validated
- 12 Feb 2026
- Decided
- 25 Feb 2026
- Ward
- Isleworth
- Postcode
- TW7 7EZ
Timeline
Dates from the published record
-
3 Feb 2026
Received by Hounslow
-
12 Feb 2026
Validated
Checked as complete and ready for consideration.
-
25 Feb 2026
Decision issued: GRANT
-
12 Aug 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
9 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Trade members open them from here.
Open the documentsWhat this grant of permission means
Hounslow granted permission on 25 February 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About lawful development applications
A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
18 CHESTNUT GROVE, ISLEWORTH, TW7 7EZ
Ground floor rear extension 6.00 metres deep, maximum height 4.00 metres, 3.00 metres high to the eaves
Granted Prior approval Extension 5 docs -
33 Chestnut Grove, Isleworth, TW7 7HA
Ground floor rear extension 5.00 metres deep, maximum height of 3.00 metres, 3.00 metres high to the eaves
Granted Prior approval Extension 5 docs -
4 Chestnut Grove, Isleworth, TW7 7EZ
Erection of single storey side and rear extension to the house. Following the demolition of existing rear extension.
Granted Householder Extension Demolition 9 docsSmall domestic -
11 Chestnut Grove, Isleworth, TW7 7HA
Certificate of lawfulness proposed for a hip to gable conversion and erection of rear roof extension with one side and two front roof windows to the house.
Granted Lawful development Extension Loft or dormer +1 7 docs -
2A Cleveland Road, Isleworth, TW7 7EY
Raising of roof ridge, erection of a rear roof extension with hip to gable conversion to both side of the roof and two front roof windows to the house.
Granted Householder Extension Loft or dormer +1 9 docsDomestic -
2A Cleveland Road, Isleworth, TW7 7EY
Certificate of lawfulness for the proposed erection of a single storey rear extension to the house.
Granted Lawful development Extension 9 docsSmall domestic
Other lawful development applications
In Hounslow
-
P/2026/2033 Granted
3 Benedict Drive, Feltham, TW14 8JH
Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion with windows to the front and side of the house.
-
P/2026/2027 Granted
115 Northumberland Crescent, Feltham, TW14 9SP
Certificate of lawfulness for the proposed erection of a rear roof extension and windows to the front of the house.
-
P/2026/2009 Granted
3 Brainton Avenue, Feltham, TW14 0AZ
Certificate of lawfulness for the proposed erection of a rear roof extension and Juliette balcony with front roof windows to the house.
-
P/2026/2014 Granted
82 Sussex Avenue, Isleworth, TW7 6LB
Certificate of lawfulness for the proposed erection of a rear roof extension, a porch to the front of the house, and a front roof window.
-
P/2026/2473 Awaiting decision
16 Somerset Waye, Hounslow, TW5 9HG
Certificate of lawfulness for the proposed erection of a rear roof extension with two roof windows to the front and alterations to the existing side roof from flat roof to pitched roof.