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Planning application

27 - 35 Mortimer Street London W1T 3BL

Granted Westminster 25/05956/FULL Full Planning Permission Application

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

Proposal

Erection of plant equipment at rear fifth floor roof level including air cooled air conditioning equipment; two condenser units and a dry air cooler within an acoustic enclosure.

As published by the council, reference 25/05956/FULL

Application record

Reference
25/05956/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
21 Aug 2025
Validated
21 Aug 2025
Decided
16 Oct 2025
Ward
West End
Decision by
Delegated Decision
Postcode
W1T 3BL

Site history

Applications at this address on the Westminster register

This site has had 3 applications since 2025: 2 approved, 0 refused.

  • 26/01158/FULL Awaiting decision

    27 - 35 Mortimer Street London W1T 3BL

    Alterations to shopfront including changes to front entrance doors; signage and other associated works. Linked with 26/01159/ADV

    Submitted 24 Feb 2026 Full applications
  • 26/01159/ADV Granted

    27 - 35 Mortimer Street London W1T 3BL

    Display of a halo illuminated (letters only) hanging sing measurng 0.45m x 0.7m. (Linked with 26/01158/FULL)

    Decided 1 May 2026 Advertising

Timeline

Dates from the published record

  1. 21 Aug 2025

    Received by Westminster

  2. 16 Oct 2025

    Decision issued: Application Permitted

  3. 21 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Planning Potential Ltd. Agent, a planning consultancy registered in London

Active · incorporated 2005 · London

934 applications on PlanIndex · across 150 councils · 91% granted

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

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Documents

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

17 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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What this grant of permission means

Westminster granted permission on 16 October 2025, 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 0.3 miles

  • 27 - 35 Mortimer Street London W1T 3BL

    26/01158/FULL Submitted 24 Feb 2026 50 yards away

    88% historically approved · decision due ~25 May

    Alterations to shopfront including changes to front entrance doors; signage and other associated works. Linked with 26/01159/ADV

    Awaiting decision Full applications Windows or glazing 20 docs

  • 27 - 35 Mortimer Street London W1T 3BL

    26/01159/ADV Submitted 24 Feb 2026 50 yards away

    Display of a halo illuminated (letters only) hanging sing measurng 0.45m x 0.7m. (Linked with 26/01158/FULL)

    Granted Advertising 21 docs

  • 20 - 22 Mortimer Street London W1T 3JW

    26/02992/ADFULL Submitted 7 May 2026 50 yards away

    89% historically approved · decision due ~2 Jul

    Details of post commissioning noise assessment report pursuant to Condition 9 of planning permission dated 21 August 2024 (RN 24/04062/FULL)

    Decided 5 docs

  • University Of Westminster 32 - 38 Wells Street London W1T 3UW

    07/03388/FULL Submitted 17 Apr 2007 50 yards away

    Retention of five air conditioning units to the flat roof at first floor level on Booth's Place frontage.

    Withdrawn Full applications 10 docs

  • University Of Westminster 32 - 38 Wells Street London W1T 3UW

    07/00741/FULL Submitted 23 Jan 2007 50 yards away

    Installation of two air-conditioning units on flat roof on Booth's Place frontage.

    Refused Full applications 8 docs

  • University Of Westminster 32 - 38 Wells Street London W1T 3UW

    07/07024/FULL Submitted 8 Aug 2007 50 yards away

    Retention of two existing air conditioning units and erection of an acoustic enclosure to the first floor flat roof.

    Granted Full applications 12 docs

In Westminster

  • 26/07528/FULL Awaiting decision

    69 Eaton Place London SW1X 8DF

    Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

    Received 5 Nov, published by the council 6 Nov 2026 Full applications
  • 26/05200/FULL Decided

    1 The Court House 165 Seymour Place London W1H 4PU

    Installation of waterproofing system to the existing lead flat roofs

    Received 3 Aug, published by the council 28 Aug 2026 Full applications
  • 26/07521/FULL Awaiting decision

    Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

    Installation of one external condenser unit

    Received 4 Nov, published by the council 6 Nov 2026 Full applications
  • 26/07508/FULL Awaiting decision

    Buckingham Palace The Mall London SW1A 1AA

    Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

    Received 4 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07472/FULL Awaiting decision

    Flat 3 82 New Cavendish Street London W1G 9TA

    Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

    Received 3 Nov, published by the council 6 Nov 2026 Full applications