16 Sidmouth Avenue, Isleworth, TW7 4DW

1. 16 Jun 2026

   Received by Hounslow

2. 15 Jul 2026

   Decision issued: PRIOR APPROVAL IS NOT REQUIRED

3. 26 Jul 2026

   Added to PlanIndex

Hounslow granted permission on 15 July 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.

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

• 14 SIDMOUTH AVENUE, ISLEWORTH, TW7 4DW

  P/2021/2208 Submitted 3 Jun 2021 12m 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

• 8 Sidmouth Avenue, Isleworth, TW7 4DW

  P/2025/3413 Submitted 13 Nov 2025 49m 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

• 12 Crawford Close, Isleworth, TW7 4DP

  P/2026/2069 Submitted 15 Jul 2026 50m 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

• 7 SIDMOUTH AVENUE, ISLEWORTH, TW7 4DW

  PA/2023/0610 Submitted 23 Feb 2023 57m 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

• 65 Sidmouth Avenue, Isleworth, TW7 4DR

  P/2024/3245 Submitted 27 Sep 2024 81m away

  Certificate of Lawfulness for the proposed change of use from Use Class C3(a) to Use Class C3(b).

  Granted Lawful development 8 docs

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

  P/2024/0767 Submitted 6 Mar 2024 106m 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

• PA/2026/2611 Awaiting decision

  72 Crosslands Avenue, Southall, UB2 5RA

  Ground floor rear extension 6 metres deep, maximum height of 3 metres, 3 metres high to the eaves

  Received 14 Sep, published by the council 17 Sep 2026 Prior approval
• PA/2026/2246 Granted

  72 Kneller Gardens, Isleworth, TW7 7NW

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

  Received 3 Aug, published by the council 5 Aug 2026 Prior approval
• PA/2026/2565 Awaiting decision

  31 Spencer Road, Isleworth, TW7 4BN

  Ground floor rear extension 4.00 metres deep, maximum height 3.60 metres, 3.00 metres high to the eaves.

  Received 9 Sep, published by the council 17 Sep 2026 Prior approval
• PA/2026/2551 Awaiting decision

  98 Bulstrode Avenue, Hounslow, TW3 3AG

  Ground floor rear extension 5.00 metres deep, maximum height 2.95 metres, 2.95 metres high to the eaves.

  Received 8 Sep, published by the council 10 Sep 2026 Prior approval
• PA/2026/2550 Awaiting decision

  63 Beavers Crescent, Hounslow, TW4 6EU

  Ground floor rear extension 5.00 metres deep, maximum height 3.51 metres, 3.00 metres high to the eaves.

  Received 8 Sep, published by the council 10 Sep 2026 Prior approval