Planning application
4 St Marys Crescent, Isleworth, TW7 4NA
Works: Extension Loft or dormer Roofing Domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Erection of a first-floor rear infill extension, loft conversion, and increase to the roof ridge height.
As published by the council, reference P/2026/0591
Application record
- Reference
- P/2026/0591
- Type
- Householder Applications
- Status
- Decided: APPROVED
- Decision
- APPROVED
- Received
- 19 Feb 2026
- Validated
- 26 Feb 2026
- Decided
- 23 Apr 2026
- Ward
- Osterley & Spring Grove
- Postcode
- TW7 4NA
Timeline
Dates from the published record
-
19 Feb 2026
Received by Hounslow
-
26 Feb 2026
Validated
Checked as complete and ready for consideration.
-
23 Apr 2026
Decision issued: APPROVED
-
12 Aug 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
6 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 23 April 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 householder applications
Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
171 Thornbury Road, Isleworth, TW7 4QG
65% historically approved · decision due ~29 Aug
Alterations to the existing ground floor commercial unit including replacement of the shopfront, addition of a new entrance door, Installation of a rear lightwell and extension of the rear terrace area with associated external changes to the side and rear elevations.
Awaiting decision Full applications Extension Windows or glazing 7 docs -
181 Thornbury Road, Isleworth, TW7 4QG
Works to trees in a Conservation Area. Thuja plicata. Fell to ground level.
Granted Trees 5 docs -
211 JERSEY ROAD, ISLEWORTH, TW7 4RE
Ground floor rear extension 6 metres deep, maximum height of 4 metres, 2.7 metres high to the eaves
Granted Prior approval Extension 5 docs -
211 JERSEY ROAD, ISLEWORTH, TW7 4RE
Certificate of Lawfulness for the proposed erection of front/side/rear roof wraparound extension to the existing house
Refused Lawful development Extension 5 docs -
209 JERSEY ROAD, ISLEWORTH, TW7 4RE
Work to tree within conservation area: Crown reduction and cutting back roots of large magnolia tree in the driveway
Granted Trees 6 docs -
209 Jersey Road, Isleworth, TW7 4RE
Works to trees in a conservation area. Pear (A). Dead. Fell to ground level Cherry (B) Dying. Fell to ground level
Granted Trees 6 docs
Other householder applications
In Hounslow
-
P/2026/2047 Granted
9 Borough Road, Isleworth, TW7 5DY
Erection of a single storey rear extension.
-
P/2026/1858 Granted
8 CONNAUGHT AVENUE, HOUNSLOW, TW4 5BW
Erection of single storey front extension to the outbuilding for used as storage, office and a Gym. Following part demolition of the outbuilding.
-
P/2026/2503 Awaiting decision
25 Arnold Crescent, Isleworth, TW7 7NS
Erection of a single storey rear, two storey side extension, and rear roof extension with two front roof windows to the house.
-
P/2026/1522 Granted
4 Camborne Way, Hounslow, TW5 0PW
Erection of a single storey rear extension and reduction in width of the existing side and rear extension.
-
P/2026/2024 Granted
20 Hartland Road, Isleworth, TW7 6RH
Erection of a rear roof extension with windows to the front of the house.