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Planning application

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

Granted Hounslow P/2025/3644 PF-Full Applications

Works: Extension Small domestic

Read from the description, not a valuation. How we read the register

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

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

As published by the council, reference P/2025/3644

Application record

Reference
P/2025/3644
Type
PF-Full Applications
Status
Granted As published: Decided: APPROVED
Decision
Granted As published: APPROVED
Received
8 Dec 2025
Validated
18 Dec 2025
Decided
24 Jul 2026
Ward
Chiswick Homefields
Postcode
W4 1NN

Site history

Applications at this address on the Hounslow register

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

  • P/2025/3229 Granted

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

    Certificate of lawfulness of the proposed use of the site as a family childcare and indoor recreation facility comprising children's activity areas, a creche, soft play area, gym and wellness facilities, workspace and meeting rooms, lounges, and a cafe/restaurant falls within the existing building's lawful use (Use Class E)

    Decided 27 Feb 2026 Lawful development

Timeline

Dates from the published record

  1. 8 Dec 2025

    Received by Hounslow

  2. 18 Dec 2025

    Validated

    Checked as complete and ready for consideration.

  3. 24 Jul 2026

    Decision issued: APPROVED

  4. 26 Jul 2026

    Added to PlanIndex

Documents

Plans, drawings, consultee responses and the officer's report

105 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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Open the documents

What this grant of permission means

Hounslow granted permission on 24 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.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 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,London,W4 1NN

    P/2025/3229 Submitted 24 Oct 2025 0m away

    Certificate of lawfulness of the proposed use of the site as a family childcare and indoor recreation facility comprising children's activity areas, a creche, soft play area, gym and wellness facilities, workspace and meeting rooms, lounges, and a cafe/restaurant falls within the existing building's lawful use (Use Class E)

    Granted Lawful development 13 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, W4 1NN

    PAC/2021/3121 Submitted 30 Jul 2021 0m 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

    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)

    Refused 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)

    Refused Outline Extension 2 docs
    Small domestic

In Hounslow

  • P/2026/2596 Awaiting decision

    Kew Bridge Distribution Centre,Lionel Road South,Brentford,TW8 9QR

    Change of use of Unit 2A to Use Class B8 (Storage and Distribution), with 1 no. cycle parking space at ground floor level.

    Received 11 Sep, published by the council 17 Sep 2026 Full applications
  • P/2026/2592 Awaiting decision

    St Pauls Church Bath Road, Hounslow, TW3 3DA

    Installation of PV solar panels on the roof.

    Received 10 Sep, published by the council 17 Sep 2026 Full applications
  • P/2026/2588 Awaiting decision

    Griffin Brewery, Asahi UK Holdings Ltd, Chiswick Lane South, Chiswick, London, W4 2QB

    Replacing existing fencing with a three meter mesh fencing.

    Received 10 Sep, published by the council 17 Sep 2026 Full applications
  • P/2026/2579 Awaiting decision

    Land to the North of 38 Alexandra Road, Hounslow, TW3 4HN

    Erection of a two storey house with associated private amenity space, cycle and refuse storage.

    Received 10 Sep, published by the council 17 Sep 2026 Full applications
  • P/2026/2080 Granted

    2 Chiswick High Road, Chiswick, London, W4 1TH

    Replacement of all windows and doors.

    Received 16 Jul, published by the council 16 Aug 2026 Full applications