393 Whitton Dene, Isleworth, TW7 7NF

1. 22 Mar 2026

   Received by Hounslow

2. 23 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 18 May 2026

   Decision issued: REFUSED

4. 12 Aug 2026

   Added to PlanIndex

The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.

Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 389 Whitton Dene,Isleworth,Hounslow,TW7 7NF

  P/2026/0389 Submitted 9 Feb 2026 13m away

  Formation of a vehicular access to the public pathway.

  Granted Full applications 9 docs

• 86 Kneller Gardens, Isleworth, TW7 7NW

  P/2026/2425 Submitted 25 Aug 2026 52m away

  100% historically approved · decision due ~20 Oct

  Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and a single storey rear extension.

  Awaiting decision Lawful development Extension Loft or dormer 10 docs
  Small domestic

• 212 WHITTON DENE, ISLEWORTH, TW7 7LU

  P/2021/2457 Submitted 17 Jun 2021 58m away

  Erection of a first floor side extension and a single storey rear extension.

  Granted Householder Extension 4 docs
  Small domestic

• 72 Kneller Gardens, Isleworth, TW7 7NW

  PA/2026/2246 Submitted 3 Aug 2026 65m away

  91% historically approved · decision due ~28 Sep

  Ground floor rear extension 6.00 metres deep, maximum height of 2.90 metres, 2.90 metres high to the eaves

  Awaiting decision Prior approval Extension 4 docs

• 72 Kneller Gardens, Isleworth, TW7 7NW

  P/2026/2105 Submitted 20 Jul 2026 65m away

  100% historically approved · decision due ~14 Sep

  Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion with front roof windows.

  Awaiting decision Lawful development Extension Loft or dormer +1 4 docs

• 70 KNELLER GARDENS, ISLEWORTH, HOUNSLOW, TW7 7NW

  P/2021/2382 Submitted 14 Jun 2021 69m away

  Works to Crab Apple Tree comprising of cutting overhanging branches back to boundary within TPO 618

  Refused Trees 9 docs

• P/2026/2047 Granted

  9 Borough Road, Isleworth, TW7 5DY

  Erection of a single storey rear extension.

  10 Jul 2026 Householder
• 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.

  23 Jun 2026 Householder
• 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.

  3 Sep 2026 Householder
• 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.

  20 May 2026 Householder
• P/2026/2024 Granted

  20 Hartland Road, Isleworth, TW7 6RH

  Erection of a rear roof extension with windows to the front of the house.

  8 Jul 2026 Householder