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Planning application

The Dilly 21 Piccadilly London W1J 0BH

Granted Westminster 25/08949/LBC Listed Building Consent Application

Relates to 25/08948/FULL

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 25/08948/FULL)

As published by the council, reference 25/08949/LBC

Application record

Reference
25/08949/LBC
Type
Listed Building Consent 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 Awaiting decision

    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 Awaiting decision

    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
  • 25/08948/FULL Granted

    The Dilly 21 Piccadilly London W1J 0BH

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

    Decided 20 Jul 2026 Full applications
  • 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

  • 25/08948/FULL Granted

    The Dilly 21 Piccadilly London W1J 0BH

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

    Decided 20 Jul 2026 Full applications

1 later application on the register refers to this one:

  • 25/08948/FULL Granted

    The Dilly 21 Piccadilly London W1J 0BH

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

    Decided 20 Jul 2026 Full applications

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

34 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

31 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 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

  • The Dilly 21 Piccadilly London W1J 0BH

    25/08948/FULL Submitted 9 Dec 2025 50 yards away

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

    Granted Full applications 29 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

  • 26/04878/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

    Alterations to internal partitions, door openings, doors and floor finishes.

    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

    Installation of new concrete slab with drainage channels at basement level and new fire surround in B.01.

    Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
  • 26/06318/LBC Awaiting decision

    124 Hamilton Terrace London NW8 9UT

    Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06317/FULL)

    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