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Planning application

CL/25/06645

1 Alderson Street, London, W10 5JY

Granted Kensington and Chelsea Certificates Lawful Proposed Use or Dev.

Proposal

Proposed remedial works at Chapter Portobello, 1 Alderson Street: removal of complete render system including all paper faced insulation and subframing, all timber particle sheathing boards including any existing intumescent cavity barriers in the internal courtyard elevations; installation of new cavity barriers, weatherboard, sealant, insulation and replacement render (Certificate of Lawful Proposed Use / Development)

As published by the council, reference CL/25/06645

Timeline

Dates from the published record

  1. 10 Nov 2025

    Received by Kensington and Chelsea

  2. 2 Apr 2026

    Decision issued: Grant Planning Permission/Consent

  3. 20 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

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

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  • SNN/26/02252 Decided

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  • NMA/21/03921 Withdrawn

    253-259 Kensal Road, London, W10 5DE

    Non-material amendment to planning permission PP/18/07896 (Demolition of laundry and residential buildings, and erection of part 5/part 6 storey commercial (Class B1) building with ancillary A1/A3 unit, with new entrances (Major Application)) to enable a planning condition to be added to the approved consent, which will allow the phasing of the approved scheme into two separate phases as follows: Phase 1: demolition Phase 2: main works***WITHDRAWN***

    23 Jun 2021 101m away Amendments
  • PP/21/01413 Withdrawn

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    Variation of Condition 2 (Compliance with approved drawings) of planning permission PP/18/07896 for a reduction in size and depth of approved basement, internal re-planning of floors at all levels, changes to plant at roof level, improvement in floor to ceiling heights, adjustment to fa?ade reveal depth on Middle Row (west) elevation and amendment to the positioning of entrances on Conlan Street. ***WITHDRAWN***

    4 Mar 2021 101m away Full applications
  • CL/26/00057 Granted

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    Remediation works to fa?ade; removal of combustible materials and replacing with fire rated products of equal visual likeness (Certificate of Lawful Proposed Use or Development)

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In Kensington and Chelsea

  • CL/26/01267 Granted

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  • CL/26/02700 Granted

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    19 May 2026 Lawful development
  • CL/26/02515 Granted

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    Reconfiguration of the accommodation at Flat A and Flat C to create one four-bed dwelling and one one-bed dwelling (Certificate of Lawful Proposed Development / Use)

    6 May 2026 Lawful development
  • CL/26/03998 Awaiting decision

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    Confirmation that the existing A/C Units & Screening to the north and south sides on the flat roofs at ground and first floor levels are lawful (Certificate of Lawful Existing Use/Development)

    23 Jul 2026 Lawful development
  • CL/26/04000 Awaiting decision

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    23 Jul 2026 Lawful development