39 Roxborough Avenue, Isleworth, TW7 5HQ

1. 16 Mar 2026

   Received by Hounslow

2. 15 Jun 2026

   Decision issued: APPROVED

3. 12 Aug 2026

   Added to PlanIndex

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.

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

• 37 Roxborough Avenue, Isleworth, TW7 5HQ

  P/2025/2519 Submitted 14 Aug 2025 12m away

  Erection of a two storey side, single storey rear, part first floor rear extension and a new front porch following the demolition of the existing side garage

  Granted Householder Extension Demolition 9 docs
  Small domestic

• 35 ROXBOROUGH AVENUE, ISLEWORTH, TW7 5HQ

  P/2021/2261 Submitted 7 Jun 2021 17m away

  Variation of Condition 2 (approved plans) and Condition 3 (Materials) to allow external finish above study to use tiles instead of render following planning permission 00966/35/P1 for erection of a single storey front, side infill and rear extension to the house including four roof lights and the conversion of the garage to a habitable room.

  Granted Householder Extension Loft or dormer 5 docs
  Small domestic

• 33 Roxborough Avenue, Isleworth, TW7 5HQ

  P/2025/2966 Submitted 3 Oct 2025 28m away

  Erection of hip to gable conversion to main house, part two storey part first floor side extension, single storey rear extension, single storey front extension and porch to the house.

  Granted Householder Extension Loft or dormer 5 docs
  Small domestic

• 38 ROXBOROUGH AVENUE, ISLEWORTH, TW7 5HJ

  P/2021/2421 Submitted 15 Jun 2021 44m away

  Conversion of the garage into a habitable room of the house

  Granted Householder 6 docs
  Domestic

• 41 NORTHUMBERLAND AVENUE, ISLEWORTH, TW7 5HZ

  P/2019/3927 Submitted 29 Oct 2019 104m away

  Conversion of existing store into a habitable room and replacement of up and over door with new windows

  Granted Householder Windows or glazing 6 docs
  Domestic

• 48 ALBURY AVENUE, ISLEWORTH, TW7 5HX

  P/2021/2135 Submitted 1 Jun 2021 105m away

  Certificate of Lawfulness for the erection of a hip to gable and rear roof extension with two front roof windows to the house

  Granted Lawful development Extension Loft or dormer +1 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