13 Yeomans Mews, Isleworth, TW7 7LZ

1. 19 Aug 2025

   Received by Hounslow

2. 23 Oct 2025

   Decision issued: GRANT

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.

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

• Various grass verges within Queensbridge Park, Isleworth, TW7 7LX

  P/2026/2312 Submitted 10 Aug 2026 47m away

  Works to trees within a conservation area T1 - B Copper Beech (Fagus sylvatica purpurea) Crown lift by approximately 0.5-1m to allow some more light into surrounding flowerbeds. Final height and spread = unchanged. T3 - B Cherry (Prunus spp) 20% Crown Reduction - Reducing the height and spread of the tree by approximately 1-2m to tidy and contain, retaining furnishing growth. Final height = m and final spread = 2m. T4 - A Rowan (Sorbus aucuparia) Fell to ground level as tree is half dead. T8 - B Common Beech (Fagus sylvatica) 30% Crown Reduction - Reducing the height and spread of the tree by approximately 2m to tidy and rebalance, retaining furnishing growth. Final height = 8m and final spread = 4m. T9 - A Cherry (Prunus spp) Fell to ground level as tree is half dead.

  Withdrawn Trees 2 docs

• 12 CONSORT MEWS, ISLEWORTH, TW7 7NA

  P/2023/0236 Submitted 25 Jan 2023 61m away

  Erection of a part two storey, part single storey side extension to the house

  Granted Householder Extension 15 docs
  Small domestic

• 12 Consort Mews, Isleworth, TW7 7NA

  P/2026/2401 Submitted 19 Aug 2026 61m away

  76% historically approved · decision due ~20 Oct

  Erection of a two storey side extension, part single storey part two storey rear extension, porch extension to the front, alterations to fenestrations, erection of a rooflight to the rear.

  Awaiting decision Householder Extension Loft or dormer 7 docs
  Small domestic

• Rear of 2 Regency Mews,Isleworth,TW7 7LX

  P/2025/1217 Submitted 14 Apr 2025 74m away

  Works to trees in a Conservation Area - 5 X G1 Leyland cypress (Cuprocyparis leylandii) fell to ground level

  Withdrawn Trees 2 docs

• 248 WHITTON DENE, ISLEWORTH, TW7 7LU

  P/2021/2868 Submitted 14 Jul 2021 95m away

  Erection of a rear roof and a side roof extension.

  Refused Householder Extension 5 docs
  Domestic

• 59 Arnold Crescent, Isleworth, TW7 7NS

  P/2025/3493 Submitted 20 Nov 2025 112m away

  Erection of a single storey front and single storey side and rear infill extension to convert the garage into a habitable room

  Granted Householder Extension 12 docs
  Small domestic

• P/2026/2033 Granted

  3 Benedict Drive, Feltham, TW14 8JH

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

  8 Jul 2026 Lawful development
• P/2026/2027 Granted

  115 Northumberland Crescent, Feltham, TW14 9SP

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

  8 Jul 2026 Lawful development
• P/2026/2009 Granted

  3 Brainton Avenue, Feltham, TW14 0AZ

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

  7 Jul 2026 Lawful development
• P/2026/2014 Granted

  82 Sussex Avenue, Isleworth, TW7 6LB

  Certificate of lawfulness for the proposed erection of a rear roof extension, a porch to the front of the house, and a front roof window.

  7 Jul 2026 Lawful development
• P/2026/2473 Awaiting decision

  16 Somerset Waye, Hounslow, TW5 9HG

  Certificate of lawfulness for the proposed erection of a rear roof extension with two roof windows to the front and alterations to the existing side roof from flat roof to pitched roof.

  1 Sep 2026 Lawful development