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Planning application

26/03502/CLOPUD

Site At 1 - 15 Portsea Mews London W2 2BN

Awaiting decision Westminster Certificate of Lawfulness (proposed)

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

Timeline

Dates from the published record

  1. 28 May 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.

What happens while it is decided

The process from here

This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

About lawful development applications

How this application type works

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

  • 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 ).

    20 Feb 2026 8m away Full applications
  • 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).

    30 Mar 2026 8m away 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 ).

    26 Feb 2026 8m away Full applications
  • 26/01142/LBC Granted

    20 Portsea Place London W2 2BL

    Subdivision of lower ground floor bathroom to create a single bathroom and a separate shower room.

    23 Feb 2026 25m away Heritage and listed buildings
  • 26/03725/LBC Awaiting decision

    15 Portsea Place London W2 2BL

    Formation of new door opening and infilling of existing opening to rear courtyard elevation, together with associated repair, refurbishment and landscaping works. Including Internal reconfiguration of lower ground floor flat. (Linked with 26/03726/FULL)

    8 Jun 2026 27m away Heritage and listed buildings
  • 26/03726/FULL Awaiting decision

    15 Portsea Place London W2 2BL

    Formation of new door opening and infilling of existing opening to rear courtyard elevation, together with associated repair, refurbishment and landscaping works. Including Internal reconfiguration of lower ground floor flat. (Linked with 26/03725/LBC)

    8 Jun 2026 27m away Full applications

In Westminster

  • 26/04958/CLEUD Awaiting decision

    1 Sussex Square London W2 2SJ

    Use of a building as mixed use as C3 (single residential dwelling) and C1 (short-stay accommodation)

    24 Jul 2026 Lawful development
  • 26/04971/CLOPUD Awaiting decision

    Flat 23 192 Emery Hill Street London SW1P 1PN

    Replacement of the existing single-glazed moving window sashes, casement panels, and balcony door leaves with slimline double-glazed timber units. The existing outer timber frames fixed into the building will be retained and will not be removed or altered. The replacement units will match the existing windows in material, design, glazing bar pattern, opening method, dimensions, and external appearance. No alterations are proposed to the building structure, external walls, openings, or window frame sizes. No new access, alterations to existing access, new streets, hardstandings, means of enclosure, or drainage works are proposed. The precise location and details of the replacement windows are shown on the accompanying drawings.

    24 Jul 2026 Lawful development
  • 26/04832/CLEUD Awaiting decision

    Basement Flat 117 Kilburn Park Road London NW6 5LB

    Use or Development in respect of the detached single-storey outbuilding within the rear garden of the applicants property.

    20 Jul 2026 Lawful development
  • 26/04856/CLOPUD Awaiting decision

    Flat 15 192 Emery Hill Street London SW1P 1PN

    Replacement of the existing single-glazed moving sashes, casement panels, and balcony door leafs with slimline double glazed timber units within the fully retained existing external timber frames.

    20 Jul 2026 Lawful development
  • 26/04632/CLOPUD Awaiting decision

    165 Oliphant Street London W10 4EA

    Installation of solar panels to generate clean, renewable energy from sunlight and reduce reliance on grid electricity and fossil fuels.

    10 Jul 2026 Lawful development