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Planning application

34 Portland Place London W1B 1LX

Awaiting decision Westminster 25/09187/LBC Listed Building Consent Application

Works: Extension Domestic

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

Relates to 25/09186/FULL

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Use of 34 Portland Place primarily as the Ambassador's dwellinghouse, use of 73 New Cavendish Street as a Polish cultural centre and diplomatic premises, and associated alterations and extensions. [Linked to 25/09186/FULL]

As published by the council, reference 25/09187/LBC

Application record

Reference
25/09187/LBC
Type
Listed Building Consent Application
Status
Pending
Received
19 Dec 2025
Validated
20 Feb 2026
Ward
West End
Postcode
W1B 1LX

Site history

Applications at this address on the Westminster register

This site has had 6 applications since 2025.

  • 26/07338/ADLBC Awaiting decision

    34 Portland Place London W1B 1LX

    Details of samples of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 3 of listed building dated 15th October 2026 (RN:25/09187/LBC) (Linked to 26/07337/ADFULL)

    Submitted 26 Oct 2026
  • 26/07337/ADFULL Awaiting decision

    34 Portland Place London W1B 1LX

    Details of samples of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 8 of planning permission dated 15.10.2026 (RN:25/09186/FULL) (Linked to 26/07338/ADLBC)

    Submitted 26 Oct 2026
  • 26/07309/ADLBC Awaiting decision

    34 Portland Place London W1B 1LX

    Details of routes of pipework for misting system and location and appearance of nozzles pursuant to condition 2 (IV) of listed building dated 15th October 2026 (RN:25/09187/LBC)

    Submitted 23 Oct 2026
  • 26/07255/ADLBC Awaiting decision

    34 Portland Place London W1B 1LX

    Details of glazed panels to staircase showing extent of position and method of fixing pursuant to condition 2 part V of listed building dated 15 October 2015 2026 (25/09187/LBC)

    Submitted 22 Oct 2026
  • 25/09186/FULL Awaiting decision

    34 Portland Place London W1B 1LX

    Use of 34 Portland Place primarily as the Ambassador's dwellinghouse, use of 73 New Cavendish Street as a Polish cultural centre and diplomatic premises, and associated alterations and extensions. [Linked to 25/09187/LBC]

    Submitted 19 Dec 2025 Full applications

Timeline

Dates from the published record

  1. 19 Dec 2025

    Received by Westminster

  2. 20 Feb 2026

    Validated

    Checked as complete and ready for consideration.

  3. 20 Jul 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 17 April 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Westminster took a median of 91 days over the applications it decided in the last year.

Cases linked to this one on the register

  • 25/09186/FULL Awaiting decision

    34 Portland Place London W1B 1LX

    Use of 34 Portland Place primarily as the Ambassador's dwellinghouse, use of 73 New Cavendish Street as a Polish cultural centre and diplomatic premises, and associated alterations and extensions. [Linked to 25/09187/LBC]

    Submitted 19 Dec 2025 Full applications

4 later applications on the register refer to this one:

  • 26/07338/ADLBC Awaiting decision

    34 Portland Place London W1B 1LX

    Details of samples of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 3 of listed building dated 15th October 2026 (RN:25/09187/LBC) (Linked to 26/07337/ADFULL)

    Submitted 26 Oct 2026
  • 26/07309/ADLBC Awaiting decision

    34 Portland Place London W1B 1LX

    Details of routes of pipework for misting system and location and appearance of nozzles pursuant to condition 2 (IV) of listed building dated 15th October 2026 (RN:25/09187/LBC)

    Submitted 23 Oct 2026
  • 26/07255/ADLBC Awaiting decision

    34 Portland Place London W1B 1LX

    Details of glazed panels to staircase showing extent of position and method of fixing pursuant to condition 2 part V of listed building dated 15 October 2015 2026 (25/09187/LBC)

    Submitted 22 Oct 2026
  • 25/09186/FULL Awaiting decision

    34 Portland Place London W1B 1LX

    Use of 34 Portland Place primarily as the Ambassador's dwellinghouse, use of 73 New Cavendish Street as a Polish cultural centre and diplomatic premises, and associated alterations and extensions. [Linked to 25/09187/LBC]

    Submitted 19 Dec 2025 Full applications

Who's behind it

Company information only, from the register and Companies House

Cohanim Architecture Agent, an architecture practice

36 applications on PlanIndex · across 15 councils · 71% 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

25 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 happens while it is decided

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 119 days. More in our guide to how long planning decisions take.

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

  • 34 Portland Place London W1B 1LX

    25/09186/FULL Submitted 19 Dec 2025 50 yards away

    88% historically approved · decision due ~17 Apr

    Use of 34 Portland Place primarily as the Ambassador's dwellinghouse, use of 73 New Cavendish Street as a Polish cultural centre and diplomatic premises, and associated alterations and extensions. [Linked to 25/09187/LBC]

    Awaiting decision Full applications Extension 31 docs
    Domestic

  • L'ecole Internationale Franco-Anglaise 36 Portland Place London W1B 1LS

    25/09231/FULL Submitted 19 Dec 2025 50 yards away

    Removal of reciprocal means of escape shared between 34 Portland Place and 36 Portland Place and implementation of fire upgrades throughout 36 Portland Place to ensure compliance with current building regulations affecting educational institutions within listed buildings. Works incorporate removal of redundant fire escape doors, upgrades to existing door furniture, installation of partitions to create fire separation lobbies, installation of mechanical extract among other minor alterations (Linked to 25/09232/LBC)

    Withdrawn Full applications 28 docs

  • 36 Portland Place London W1B 1LS

    13/03998/ADFULL Submitted 2 May 2013 50 yards away

    Submission of details of refuse & recycling storage and a Travel Plan, pursuant to Conditions 9 and 10 of planning permission dated 08 March 2013 (RN: 12/07230)namely details .

    Granted Full applications 5 docs

  • L'ecole Internationale Franco-Anglaise 36 Portland Place London W1B 1LS

    25/09232/LBC Submitted 19 Dec 2025 50 yards away

    Removal of reciprocal means of escape shared between 34 Portland Place and 36 Portland Place and implementation of fire upgrades throughout 36 Portland Place to ensure compliance with current building regulations affecting educational institutions within listed buildings. Works incorporate removal of redundant fire escape doors, upgrades to existing door furniture, installation of partitions to create fire separation lobbies, installation of mechanical extract among other minor alterations (Linked to 25/09231/FULL)

    Withdrawn Heritage and listed buildings 29 docs

  • Abercorn School 38 Portland Place London W1B 1LS

    26/07321/ADFULL Submitted 26 Oct 2026 50 yards away

    89% historically approved · decision due ~24 Dec

    Details of cycle storage pursuant to condition 13 of planning permission dated 9th July 2026 (RN: 26/00351/FULL).

    Awaiting decision

  • Abercorn School 38 Portland Place London W1B 1LS

    26/06997/ADFULL Submitted 13 Oct 2026 50 yards away

    89% historically approved · decision due ~8 Dec

    Details of how waste is to be stored on site and how materials for recycling will be stored separately pursuant to condition 14 of planning permission dated 9th July 2026 (RN: 26/00351/FULL)

    Awaiting decision

In Westminster

  • 26/07529/LBC Awaiting decision

    69 Eaton Place London SW1X 8DF

    Installation of new cast iron water supply pipe on rear courtyard elevation. (Linked with 26/07528/FULL)

    Received 5 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
  • 26/07509/LBC 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 26/07508/FULL)

    Received 4 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
  • 26/07473/LBC Awaiting decision

    Flat 3 82 New Cavendish Street London W1G 9TA

    Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07472/FULL)

    Received 3 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
  • 26/07471/LBC Awaiting decision

    12 Queen Anne's Gate London SW1H 9AA

    Excavation of single-storey basement, internal reconfiguration and installation of modern services. (Linked with 26/07470/FULL)

    Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
  • 26/07461/LBC Awaiting decision

    1 Savile Row London W1S 3JR

    Minor internal works comprising redecoration and upgrades to lighting, flooring and bathroom and kitchen facilities, together with external works including new lighting and signage.

    Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings