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 50 yards 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 50 yards 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, W4 1NN

  PAC/2021/3121 Submitted 30 Jul 2021 50 yards away

  Prior approval notification for change of use from office (Use Class E(g)(i)) (previously Use Class B1(a)) to form 50 residential flats comprising 37 studios, 11 one bedroom flats and two. 2 bedroom flats (Use Class C3).

  Refused Prior approval New dwelling 21 docs

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

  P/2025/3644 Submitted 8 Dec 2025 50 yards 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 50 yards 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)

  Refused Outline Extension 2 docs
  Small domestic

• Mulliner House Flanders Road Chiswick London W4 1NN

  260527CONS Submitted 10 Feb 2026 50 yards 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)

  Refused Outline Extension 2 docs
  Small domestic

• P/2026/2813 Awaiting decision

  150 Wood Lane, Isleworth, TW7 5EQ

  (GSGS877009741) Certificate of lawfulness proposed for the erection of a single storey outbuilding to be used as a home gym / playroom / shed in the rear garden of the house

  Received 5 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2334 Granted

  69 Central Avenue, Hounslow, TW3 2QW

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

  Received 12 Aug, published by the council 16 Aug 2026 Lawful development
• P/2026/2459 Granted

  2 Letchworth Avenue, Feltham, TW14 9RY

  Certificate of Lawfulness for the proposed hip to gable roof conversion, installation of two front roof windows, and erection of a rear roof extension to the existing house.

  Received 28 Aug, published by the council 5 Sep 2026 Lawful development
• P/2026/2787 Awaiting decision

  13 Denbigh Road, Hounslow, TW3 4DU

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

  Received 1 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2790 Awaiting decision

  14 Old Farm Close, Hounslow, TW4 7AB

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

  Received 1 Oct, published by the council 6 Oct 2026 Lawful development