Mulliner House,Flanders Road,Chiswick,London,W4 1NN

This site has had 2 applications since 2025: 2 approved, 0 refused.

• P/2025/3644 Granted

  Mulliner House, Flanders Road, Chiswick, London, W4 1NN

  Erection of a single storey side extension and an additional floor at roof level with a roof terrace, relocation of the entrance and alterations to the façade, enclosure of the basement car park to create swimming pools with landscaping, plants and associated works

  Decided 24 Jul 2026 Full applications

1. 24 Oct 2025

   Received by Hounslow

2. 29 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 27 Feb 2026

   Decision issued: GRANT

4. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 27 February 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.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• MULLINER HOUSE FLANDERS ROAD, CHISWICK, W4 1NN

  P/2021/2577 Submitted 24 Jun 2021 0m away

  T1 Norway Maple. Crown reduce close to previous prune points. Height reduce 2m Spread 1.5m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. T2 Norway Maple. Crown reduce close to previous prune points. Height reduce 2m Spread max 1m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. T3 Norway Maple (red). Crown reduced by 30%. Height reduce 3m Spread 2m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. T4 Norway Maple. Crown reduced by 30%. Height reduce 2m Spread 1.5m. Prune back off building to create a 2m clearance between tree and building. Lift crowns to 2.5m. Reason for works. To maintain the trees at no larger than the present size.

  Granted Trees 6 docs

• Mulliner House,Flanders Road,Chiswick,W4 1NN

  P/2024/3506 Submitted 21 Oct 2024 0m away

  Works to trees in a Conservation Area - G1- 3 X Maple prune clear of building to allow 1.5 metres clearance and T2-Maple prune clear of street lamp by 1 metre in front garden

  Granted Trees 4 docs

• Mulliner House, Flanders Road, Chiswick, London, W4 1NN

  P/2025/3644 Submitted 8 Dec 2025 0m away

  Erection of a single storey side extension and an additional floor at roof level with a roof terrace, relocation of the entrance and alterations to the façade, enclosure of the basement car park to create swimming pools with landscaping, plants and associated works

  Granted Full applications Extension 105 docs
  Small domestic

• Mulliner House Flanders Road Chiswick London W4 1NN

  260527CONS Submitted 10 Feb 2026 0m away

  Erection of a single storey side extension and an additional floor at roof level with a roof terrace, relocation of the entrance and alterations to the facade, enclosure of the basement car park to create swimming pools with landscaping and associated works ( out of borough)

  Decided Outline Extension 2 docs
  Small domestic

• Mulliner House Flanders Road Chiswick London W4 1NN

  260527CONS Submitted 10 Feb 2026 0m away

  Erection of a single storey side extension and an additional floor at roof level with a roof terrace, relocation of the entrance and alterations to the facade, enclosure of the basement car park to create swimming pools with landscaping and associated works ( out of borough)

  Decided Outline Extension 2 docs
  Small domestic

• 4 Flanders Road, Chiswick, London, W4 1NG

  P/2026/1924 Submitted 29 Jun 2026 35m away

  76% historically approved · decision due ~24 Aug

  Erection of a side and rear dormer with a front rooflight and a rear solar tube to the house and increase in height of the existing outbuilding and installation of a pergola.

  Awaiting decision Householder Loft or dormer 16 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