18 Sidmouth Avenue, Isleworth, TW7 4DW

1. 4 Dec 2024

   Received by Hounslow

2. 15 Jan 2025

   Decision issued: APPROVED

3. 30 Sep 2026

   Added to PlanIndex

Hounslow granted permission on 15 January 2025, 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.

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.

• 16 Sidmouth Avenue, Isleworth, TW7 4DW

  PA/2026/1784 Submitted 16 Jun 2026 50 yards away

  Ground floor rear extension 5.00 metres deep, maximum height of 3.20 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 7 docs

• 14 SIDMOUTH AVENUE, ISLEWORTH, TW7 4DW

  P/2021/2208 Submitted 3 Jun 2021 50 yards away

  Certificate of Lawfulness for proposed erection of a rear roof extension incorporating hip to gable conversion and two front roof windows; Alterations to the existing ground floor rear extension comprising of the removal of the existing opens and installation of one new window and French doors to the house

  Granted Lawful development Extension Loft or dormer +1 5 docs

• 12 Crawford Close, Isleworth, TW7 4DP

  P/2026/2069 Submitted 15 Jul 2026 50 yards away

  Non material amendment to allow the increase of the width of the single storey side extension from 0.8m to 1.35m of planning permission P/2024/1156 approved 18/06/2024 for the erection of single storey rear, single storey side and part first floor rear extension to the house

  Refused Amendments Extension 3 docs
  Small domestic

• 8 Sidmouth Avenue, Isleworth, TW7 4DW

  P/2025/3413 Submitted 13 Nov 2025 50 yards away

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

  Granted Lawful development Extension Windows or glazing 8 docs

• 7 SIDMOUTH AVENUE, ISLEWORTH, TW7 4DW

  PA/2023/0610 Submitted 23 Feb 2023 100 yards away

  Ground floor rear extension 4.00 metres deep, maximum height 3.54 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 5 docs

• UNITS 1 AND 2 AND PARTS GARAGE RENNELS WAY, ISLEWORTH, TW7 6NA

  P/2024/0767 Submitted 6 Mar 2024 100 yards away

  Application for modification to Schedule 1, Paragraph 4 (Clauses 4.1- 4.5) Affordable Housing of S106 legal agreement dated 13th March 2020 in relation to permission 00981/1-2/P1 for proposed mixed use redevelopment comprising, demolition of existing buildings and construction of two buildings up to seven storeys to provide 650 square metres (Use Class B1) of commercial floor space, and 53 dwellings (1 studio, 24 one-bedroom, 22 two-bedroom, 5 three-bedroom and 1 four-bedroom) with associated access and highway works, amenity areas, cycle and disabled car parking and refuse/recycling stores.

  Refused Conditions Demolition 7 docs
  Major scheme

• P/2026/2304 Granted

  18 Clifden Road, Brentford, TW8 0PF

  Erection of a side and rear extensions.

  Received 7 Aug, published by the council 12 Aug 2026 Householder
• P/2026/2804 Awaiting decision

  128 Durham Road, Feltham, TW14 0AE

  Erection of a detached outbuilding in the rear garden following demolition of existing shed.

  Received 2 Oct, published by the council 9 Oct 2026 Householder
• P/2026/2301 Granted

  4 Glebe Street, Chiswick, W4 2BG

  Erection of a front side and rear side infill extensions with alterations to the rear elevation, a rear side first floor infill extension with replacement of windows to the rear elevation and installation of new rooflights to the existing ground floor infill extension of the house

  Received 7 Aug, published by the council 16 Aug 2026 Householder
• P/2026/1167 Granted

  20 Firs Drive, Hounslow, TW5 9TD

  Erection of part one, part two-storey side extension following demolition of existing garage and part one, part two-storey rear extension. Raising of roof ridge, erection of rear roof extensions, and installation of one front roof window.

  Received 15 Apr, published by the council 26 Jul 2026 Householder
• P/2026/2025 Granted

  1 Kneller Gardens, Isleworth, TW7 7NP

  Erection of a single storey rear and first floor side extension incorporating the conversion of the existing garage to a habitable room

  Received 8 Jul, published by the council 26 Jul 2026 Householder