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Planning application

Third Floor Mappin House 4 Winsley Street London W1W 8HF

Granted Westminster 25/08684/LBC Listed Building Consent Application

Relates to 25/08683/FULL

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

Proposal

Removal and replacement of air conditioning units at roof level, and internal alterations to office space at third floor level. (Linked with 25/08683/FULL)

As published by the council, reference 25/08684/LBC

Application record

Reference
25/08684/LBC
Type
Listed Building Consent Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
27 Nov 2025
Validated
27 Nov 2025
Decided
2 Apr 2026
Ward
West End
Decision by
Delegated Decision
Postcode
W1W 8HF

Site history

Applications at this address on the Westminster register

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

  • 25/08683/FULL Granted

    Third Floor Mappin House 4 Winsley Street London W1W 8HF

    Removal and replacement of air conditioning units at roof level. (Linked with 25/08684/LBC)

    Decided 7 Apr 2026 Full applications

Timeline

Dates from the published record

  1. 27 Nov 2025

    Received by Westminster

  2. 2 Apr 2026

    Decision issued: Application Permitted

  3. 20 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/08683/FULL Granted

    Third Floor Mappin House 4 Winsley Street London W1W 8HF

    Removal and replacement of air conditioning units at roof level. (Linked with 25/08684/LBC)

    Decided 7 Apr 2026 Full applications

1 later application on the register refers to this one:

  • 25/08683/FULL Granted

    Third Floor Mappin House 4 Winsley Street London W1W 8HF

    Removal and replacement of air conditioning units at roof level. (Linked with 25/08684/LBC)

    Decided 7 Apr 2026 Full applications

Who's behind it

Company information only, from the register and Companies House

Geoff Brown Studio Ltd Agent, registered in Ashford

Active · incorporated 2009 · Ashford

2 applications on PlanIndex

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

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

27 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.

Watch members (£5 a month) open the document list from here.

Open the documents

What this grant of permission means

Westminster granted permission on 2 April 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 heritage and listed building applications

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • Third Floor Mappin House 4 Winsley Street London W1W 8HF

    25/08683/FULL Submitted 27 Nov 2025 50 yards away

    Removal and replacement of air conditioning units at roof level. (Linked with 25/08684/LBC)

    Granted Full applications 26 docs

  • 158 Oxford Street London W1D 1LZ

    26/01191/LBC Submitted 25 Feb 2026 50 yards away

    90% historically approved · decision due ~8 Jul

    Installation of 11 metres of fibre telecommunications cable from a fibre termination box in the basement telecoms room, to a communications cabinet located in the ground floor managers office.

    Awaiting decision Heritage and listed buildings 10 docs

  • Ground Floor 156 Oxford Street London W1D 1ND

    26/02551/LBC Submitted 17 Apr 2026 50 yards away

    90% historically approved · decision due ~12 Jun

    Retrospective consent for the replacement of non-original pavement lights and associated structural repairs and below ground waterproofing remedial works.

    Awaiting decision Heritage and listed buildings 12 docs

  • 156 Oxford Street London W1D 1ND

    25/08414/FULL Submitted 18 Nov 2025 50 yards away

    Installation of a new shopfront including internal fit out works and refurbishments at ground floor level; signage and other associated works. (Linked to 25/08415/LBC)

    Granted Full applications Windows or glazing 24 docs

  • 156 Oxford Street London W1D 1ND

    25/08415/LBC Submitted 18 Nov 2025 50 yards away

    Installation of a new shopfront including internal fit out works and refurbishments at ground floor level; signage and other associated works. (Linked to 25/08414/FULL & 25/08091/ADV)

    Granted Heritage and listed buildings Windows or glazing 25 docs

  • 156 Oxford Street London W1D 1ND

    25/08091/ADV Submitted 6 Nov 2025 50 yards away

    Display of one internally illuminated fascia sign (letters only) measuring 3.2m x 0.4m. (Linked iwth 25/08415/LBC)

    Granted Advertising 13 docs

In Westminster

  • 26/04878/LBC Decided

    34 Grosvenor Street London W1K 4QU

    Internal works to facilitate the subdivision of 34 Grosvenor Street and 3 Three Kings Yard

    Received 21 Jul, published by the council 1 Aug 2026 Heritage and listed buildings
  • 26/06299/LBC Awaiting decision

    Apartment 33 24 Park Crescent London W1B 1AA

    Removal of non structural partitions, replacement of non original doors with full height concealed doors.

    Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
  • 26/06305/LBC Awaiting decision

    33A Dean Street London W1D 4PP

    Waterproofing the basement level.

    Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
  • 26/04141/LBC Decided

    80E Randolph Avenue London W9 1BG

    Replacement of sashes in two front windows at 2nd floor level and one rear window with slimline double glazed timber sashes. (Linked with 26/04142/FULL)

    Received 23 Jun, published by the council 21 Jul 2026 Heritage and listed buildings
  • 26/06288/LBC Awaiting decision

    Barness Court 6 - 8 Westbourne Terrace London W2 3UW

    Installation of a new riser as per GW10 design comprising a single riser with 7 entries and 9 Taylor valves to be installed. (Linked with 26/06287/FULL)

    Received 14 Sep, published by the council 21 Sep 2026 Heritage and listed buildings