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Planning application

25/08138/ADLBC

Halcyon London International School 33 Seymour Place London W1H 5AP

Awaiting decision Westminster Approval of Details (ADLBC)

Proposal

Detailed drawings (scaled sections and elevations) of the stained-glass light boxes & fixing details pursuant to condition 3 of listed building dated 3rd February 2025 (RN:24/08169/LBC)

As published by the council, reference 25/08138/ADLBC

Timeline

Dates from the published record

  1. 7 Nov 2025

    Received by Westminster

  2. 20 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 conditions applications

How this application type works

This type of application deals with conditions attached to an existing permission, either by supplying the details a condition requires, called discharging it, or by asking to vary or remove one. It does not reopen the principle of the permission itself. Building often cannot lawfully start, or continue past a set stage, until the named conditions are discharged.

More on conditions applications in our guide

Nearby applications

Within 500 metres

  • 26/03579/ADV Awaiting decision

    Halcyon London International School 33 Seymour Place London W1H 5AP

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  • 26/00625/FULL Granted

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    3 Feb 2026 23m away Full applications
  • 26/02794/FULL Awaiting decision

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  • 25/05313/ADV Granted

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    30 Jul 2025 53m away Advertising
  • 26/02836/FULL Awaiting decision

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    23 Apr 2026 60m away Full applications

In Westminster

  • 26/04967/ADLBC Withdrawn

    Royal Institute Of British Architects 66 Portland Place London W1B 1AD

    Details of installation of services and related fixtures pursuant to condition 8 (partial) of listed building consent dated 10 June 2025 (RN: 25/01205/LBC)

    24 Jul 2026 Conditions
  • 26/04860/ADLBC Granted

    New Zealand House 80 Haymarket London SW1Y 4TE

    Details of external and internal signage strategy pursuant to Condition 7(E) of listed building consent dated 12th February 2021 (RN: 19/07816/LBC)

    20 Jul 2026 Conditions
  • 26/04843/ADLBC Granted

    New Zealand House 80 Haymarket London SW1Y 4TE

    Detailed design and specification of new blinds to NZH based on mock-up trials on-site pursuant to Condition 6(m) of listed building consent dated 12th February 2021 (19/07816/LBC).

    20 Jul 2026 Conditions
  • 26/04998/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Detailed drawings of Bathroom and Kitchen details for apartments 01, 02, 08, 09, 10 and 11 and Reflected ceiling plans for Apartment 1 powder room and bathroom, Apartment 2 powder room and bathrooms, Apartment 8 power room and bathroom, Apartment 9 bathrooms, Apartment 10 bathroom and shower room, and Apartment 11 bathrooms pursuant to partial discharge of conditions 6.3 and 6.10 of listed building consent dated 14th March 2023 (RN: 22/05005/LBC).

    24 Jul 2026 Conditions
  • 26/04992/ADLBC Awaiting decision

    17 - 21 South Audley Street London W1K 2NY

    Detailed drawings of wall construction to new apartments pursuant to partial discharge of condition 6.2 of listed building consent dated 14th March 2023 (RN: 22/05005/LBC).

    24 Jul 2026 Conditions