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Planning application

The Dilly 21 Piccadilly London W1J 0BH

Granted Westminster 25/08948/FULL Full Planning Permission Application

Relates to 25/08949/LBC

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

Proposal

New external roof top plant and new ventilation ductwork to rear elevation. (Linked to 25/08949/LBC)

As published by the council, reference 25/08948/FULL

Application record

Reference
25/08948/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
9 Dec 2025
Validated
24 Feb 2026
Decided
20 Jul 2026
Ward
West End
Decision by
Delegated Decision
Postcode
W1J 0BH

Site history

Applications at this address on the Westminster register

This site has had 12 applications since 2025: 5 approved, 0 refused.

  • 26/05378/FULL Decided

    The Dilly 21 Piccadilly London W1J 0BH

    External repair and conservation works to existing facades, pitched and flat roofs, dormers and chimneys (linked with 26/05379/LBC)

    Submitted 7 Aug 2026 Full applications
  • 26/05379/LBC Decided

    The Dilly 21 Piccadilly London W1J 0BH

    External repair and conservation works to existing facades, pitched and flat roofs, dormers and chimneys (linked with 26/05378/FULL).

    Submitted 7 Aug 2026 Heritage and listed buildings
  • 26/04200/LBC Decided

    The Dilly 21 Piccadilly London W1J 0BH

    Retrospective strip-out of retail units at 23-26 Piccadilly and basements at 5A Air Street / 67 Regent Street to shell condition, removing modern fit-out, services, plant and shopfront elements, with associated making good and damp proofing.

    Submitted 25 Jun 2026 Heritage and listed buildings
  • 26/02997/ADLBC Awaiting decision

    The Dilly 21 Piccadilly London W1J 0BH

    Detailed drawings of the existing windows and historic secondary glazing, and the proposed refurbishment works, proposed windows, and proposed secondary glazing for each of the following window types: 1, 2, 3, 4, 5(a+b), 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 pursuant to condition 3 of listed building dated 5th July 2023 (RN:22/04551/LBC) (Linked to 26/02953/ADFULL)

    Submitted 5 May 2026 Conditions
  • 26/02953/ADFULL Awaiting decision

    The Dilly 21 Piccadilly London W1J 0BH

    Detailed drawings of the existing windows and historic secondary glazing, and the proposed refurbishment works, proposed windows, and proposed secondary glazing for each of the following window types: 1, 2, 3, 4, 5(a+b), 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 pursuant to condition 4 of planning permission dated 5th July 2023 (RN:22/04550/FULL) (Linked to 26/02997/ADLBC)

    Submitted 5 May 2026 Full applications
  • 26/02808/LBC Awaiting decision

    The Dilly 21 Piccadilly London W1J 0BH

    Retrospective application for internal refurbishment of Level 2 lift lobby.

    Submitted 28 Apr 2026 Heritage and listed buildings
  • 26/00445/LBC Awaiting decision

    The Dilly 21 Piccadilly London W1J 0BH

    Internal refurbishment and redecoration of 283 guest rooms and corridors, floor levels 1 to 9.

    Submitted 26 Jan 2026 Heritage and listed buildings
  • 25/09142/LBC Granted

    The Dilly 21 Piccadilly London W1J 0BH

    Internal works to refurbish the existing ground floor entrance bar and restaurant area

    Decided 5 May 2026 Heritage and listed buildings
  • 25/08949/LBC Granted

    The Dilly 21 Piccadilly London W1J 0BH

    New external roof top plant and new ventilation ductwork to rear elevation. (Linked to 25/08948/FULL)

    Decided 20 Jul 2026 Heritage and listed buildings
  • 25/08908/LBC Granted

    The Dilly 21 Piccadilly London W1J 0BH

    Repair works to existing plaster ceiling in hotel restaurant kitchen.

    Decided 28 Apr 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 9 Dec 2025

    Received by Westminster

  2. 24 Feb 2026

    Validated

    Checked as complete and ready for consideration.

  3. 20 Jul 2026

    Decision issued: Application Permitted

  4. 29 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/08949/LBC Granted

    The Dilly 21 Piccadilly London W1J 0BH

    New external roof top plant and new ventilation ductwork to rear elevation. (Linked to 25/08948/FULL)

    Decided 20 Jul 2026 Heritage and listed buildings

1 later application on the register refers to this one:

  • 25/08949/LBC Granted

    The Dilly 21 Piccadilly London W1J 0BH

    New external roof top plant and new ventilation ductwork to rear elevation. (Linked to 25/08948/FULL)

    Decided 20 Jul 2026 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

Consarc Design Group Ltd Agent, a design practice registered in Belfast

Active · incorporated 1989 · Belfast

42 applications on PlanIndex · across 10 councils · 100% granted

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

29 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 20 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 0.3 miles

  • The Dilly 21 Piccadilly London W1J 0BH

    25/08949/LBC Submitted 9 Dec 2025 50 yards away

    New external roof top plant and new ventilation ductwork to rear elevation. (Linked to 25/08948/FULL)

    Granted Heritage and listed buildings 31 docs

  • The Dilly 21 Piccadilly London W1J 0BH

    25/09142/LBC Submitted 17 Dec 2025 50 yards away

    Internal works to refurbish the existing ground floor entrance bar and restaurant area

    Granted Heritage and listed buildings 30 docs

  • The Dilly 21 Piccadilly London W1J 0BH

    26/00445/LBC Submitted 26 Jan 2026 50 yards away

    90% historically approved · decision due ~23 Mar

    Internal refurbishment and redecoration of 283 guest rooms and corridors, floor levels 1 to 9.

    Awaiting decision Heritage and listed buildings 56 docs

  • The Dilly 21 Piccadilly London W1J 0BH

    25/08908/LBC Submitted 8 Dec 2025 50 yards away

    Repair works to existing plaster ceiling in hotel restaurant kitchen.

    Granted Heritage and listed buildings 21 docs

  • The Dilly 21 Piccadilly London W1J 0BH

    26/02808/LBC Submitted 28 Apr 2026 50 yards away

    90% historically approved · decision due ~30 Jun

    Retrospective application for internal refurbishment of Level 2 lift lobby.

    Awaiting decision Heritage and listed buildings 12 docs

  • The Dilly 21 Piccadilly London W1J 0BH

    25/05198/FULL Submitted 25 Jul 2025 50 yards away

    Update of the MEP infrastructure to include internal works to refurbish the existing internal roof top plant room with new external acoustic louvres and new external roof top plant.

    Granted Full applications 20 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