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Planning application

Site At 1 - 15 Portsea Mews London W2 2BN

Awaiting decision Westminster 26/03502/CLOPUD Certificate of Lawfulness (proposed)

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

Proposal

Confirmation that the proposed works to the Site would be considered lawful under Section 55 of the Town and Country Planning Act if undertaken, and on completion of the proposed works, would lawfully implement the planning permission dated 29 June 2023 referenced 22/06901/FULL under Section 56 of the Town and Country Planning Act.

As published by the council, reference 26/03502/CLOPUD

Application record

Reference
26/03502/CLOPUD
Type
Certificate of Lawfulness (proposed)
Status
Pending
Received
28 May 2026
Validated
28 May 2026
Ward
Hyde Park
Postcode
W2 2BN

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2026: 2 approved, 0 refused.

  • 26/02118/ADFULL Awaiting decision

    Site At 1 - 15 Portsea Mews London W2 2BN

    Details of report on an archaeological evaluation pusuant to discharge of condition 29 of planning permission dated 2nd December 2024 (RN: 24/05595/FULL).

    Submitted 30 Mar 2026 Full applications
  • 26/01228/ADFULL Granted

    Site At 1 - 15 Portsea Mews London W2 2BN

    Details of signed appendix A checklist and Construction Management plan pursuant to condition 3 of planning permission dated 2 December 2024 (RN: 24/05595/FULL ).

    Decided 7 May 2026 Full applications
  • 26/01085/ADFULL Granted

    Site At 1 - 15 Portsea Mews London W2 2BN

    Details of conservation strategy pursuant to Condition 24 of planning permission dated 2 December 2024 (RN: 24/05595/FULL ).

    Decided 1 Apr 2026 Full applications

Timeline

Dates from the published record

  1. 28 May 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 23 July 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.

Who's behind it

Company information only, from the register and Companies House

Newmark LLP Agent

923 applications on PlanIndex · across 40 councils · 97% granted

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See their track record

Documents

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

7 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 lawful development applications in a median of 106 days. More in our guide to how long planning decisions take.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • Site At 1 - 15 Portsea Mews London W2 2BN

    26/01085/ADFULL Submitted 20 Feb 2026 50 yards away

    Details of conservation strategy pursuant to Condition 24 of planning permission dated 2 December 2024 (RN: 24/05595/FULL ).

    Granted Full applications 8 docs

  • Site At 1 - 15 Portsea Mews London W2 2BN

    26/02118/ADFULL Submitted 30 Mar 2026 50 yards away

    88% historically approved · decision due ~25 May

    Details of report on an archaeological evaluation pusuant to discharge of condition 29 of planning permission dated 2nd December 2024 (RN: 24/05595/FULL).

    Awaiting decision Full applications 4 docs

  • Site At 1 - 15 Portsea Mews London W2 2BN

    26/01228/ADFULL Submitted 26 Feb 2026 50 yards away

    Details of signed appendix A checklist and Construction Management plan pursuant to condition 3 of planning permission dated 2 December 2024 (RN: 24/05595/FULL ).

    Granted Full applications 10 docs

  • 10 Connaught Street London W2 2AH

    11/03979/FULL Submitted 26 Apr 2011 50 yards away

    Demolition of non-original rear kitchen extension and reinstatement of rear lightwell at lower ground floor level, installation of boiler enclosure in rear lightwell, replacement of windows to rear elevation and associated external alterations.

    Granted Full applications Extension Demolition +1 11 docs

  • 8 Connaught Street London W2 2AH

    07/06143/FULL Submitted 12 Jul 2007 50 yards away

    Infill below entrance steps, replacement of existing UPVC rear conservatory at first floor level, alterations to existing rear balcony and additional velux to roof.

    Granted Full applications Extension Loft or dormer 13 docs

  • 8 Connaught Street London W2 2AH

    07/06148/LBC Submitted 12 Jul 2007 50 yards away

    Infill below entrance steps, replacement of existing UPVC rear conservatory at first floor level, alterations to existing rear balcony, additional velux to roof and internal alterations.

    Granted Heritage and listed buildings Extension Loft or dormer 8 docs

In Westminster

  • 26/07468/CLOPUD Awaiting decision

    14 - 16 Great Portland Street London W1W 8QW

    Confirmation the demolition of the existing outrigger structure at fifth floor level (the Proposed Works) constitutes the lawful commencement of development pursuant to the Permission.

    Received 3 Nov, published by the council 5 Nov 2026 Lawful development
  • 26/07423/CLOPUD Awaiting decision

    103 Elgin Avenue London W9 2NP

    Painting of the decorative stonework, window frames and doors on the front elevation and front boundary wall

    Received 2 Nov, published by the council 4 Nov 2026 Lawful development
  • 26/07454/CLOPUD Awaiting decision

    10 Stratton Street London W1J 8LG

    Changes to existing windows and doors

    Received 2 Nov, published by the council 5 Nov 2026 Lawful development
  • 26/07381/CLEUD Awaiting decision

    Ground Floor Rear Flat 4 Mozart Street London W10 4LA

    Use of the ground floor rear flat as short-term visitor accommodation.

    Received 28 Oct, published by the council 5 Nov 2026 Lawful development
  • 26/07339/CLOPUD Awaiting decision

    123 Victoria Street London SW1E 6DE

    Use of part of ground floor reception area within Class E including, but not limited to, a retail café (Class E(a)).

    Received 27 Oct, published by the council 30 Oct 2026 Lawful development