P/2026/1399

1. 8 May 2026

   Received by Hounslow

2. 3 Jul 2026

   Decision issued: GRANT

3. 26 Jul 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.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• P/2021/2219 Granted

  17 THORNTON AVENUE, CHISWICK, LONDON, W4 1QE

  Details submitted pursuant of Condition 6 (construction method statement) and 7 (construction management plan) following planning permission 01122/17/P1 dated 07/09/2020 for enlargement of existing basement including creation of a front light well, replacement of front rooflight and addition of railings to front roof gable.

  27 May 2021 36m away Conditions
• P/2021/2246 Refused

  25A UPHAM PARK ROAD, CHISWICK, LONDON, W4 1PQ

  Erection of a single storey rear infill extension to the ground floor flat

  4 Jun 2021 62m away Full applications
• P/2025/2803 Decided

  Flat 1, 23 Ennismore Avenue, Chiswick, London, W4 1SE

  Erection of a single storey rear extension with fully glazed projecting roof light following the removal of the existing extension to the ground floor flat. Minor repairs to the front ground floor windows, replacement of the side window with like for like double glazed window, replacement of side door like for like, installation of an additional air conditioning unit and air source heat pump and basement tanking

  18 Sep 2025 89m away Full applications
• P/2021/2205 Granted

  FLAT 2 15 ENNISMORE AVENUE, CHISWICK, W4 1SE

  Replacement of existing door and sidelight with a white UPVC door and sidelight on first floor front elevation.

  3 Jun 2021 93m away Full applications
• P/2024/1290 Granted

  55 UPHAM PARK ROAD, CHISWICK, W4 1PQ

  Certificate of Lawfulness for existing use as two self-contained residential units and existing development of a part single storey rear extension

  24 Apr 2024 109m away Lawful development
• P/2021/0689 Granted

  94-98 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 1SH

  Details submitted pursuant to condition 11 (external privacy on windows) for planning permission 00248/94-98/P5 dated 3/11/2020 for variation of condition 2 (approved plans), 9 (roof terrace), 10 (windows), 11 (privacy louvres), 12 (external staircase), 15 (cycle parking), 20 (commercial refuse & recycling) and 21 (residential refuse & recycling) of planning permission 00248/94-98/P3 to allow a narrow aluminium/steel canopy structure to the front elevation, the increase in height of the timber acoustic enclosure at roof level, the addition of an external steel staircase at roof level for maintenance purposes, the reduction in size of a window serving the staff room at second floor level, the provision of both a refuse store (for both cinema and residential use) and bike store associated with the cinema only, the addition of a gate to the rear entrance for security purposes, and an extension of the floorspace which comprises Flat 1.

  22 Feb 2021 136m away Conditions

• P/2026/2219 Awaiting decision

  Great West House,993 Great West Road,Brentford,TW8 9DF

  Certificate of lawfulness for the installation of two electricity substations.

  29 Jul 2026 Lawful development
• P/2026/1626 Granted

  2 Oak Avenue, Hounslow, TW5 9EB

  Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and the addition of one front roof light.

  2 Jun 2026 Lawful development
• P/2026/2168 Awaiting decision

  49 Durham Road, Feltham, TW14 0AG

  Certificate of lawfulness for the proposed erection of a detached outbuilding in the rear garden.

  24 Jul 2026 Lawful development
• P/2026/1448 Granted

  13 Orchard Avenue, Hounslow, TW5 0DU

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

  13 May 2026 Lawful development
• P/2026/1682 Granted

  133 Swan Road, Feltham, TW13 6LT

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

  5 Jun 2026 Lawful development