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Planning application

Basement And Ground Floor Maisonette 21 Eaton Place London SW1X 8BP

Granted Westminster 25/06595/LBC Listed Building Consent Application

Works: Windows or glazing

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Internal alterations at lower ground floor level, including installation of damp proofing and secondary glazing to front windows.

As published by the council, reference 25/06595/LBC

Application record

Reference
25/06595/LBC
Type
Listed Building Consent Application
Status
Decided
Decision
Application Permitted
Received
15 Sep 2025
Validated
15 Sep 2025
Decided
30 Oct 2025
Ward
Knightsbridge & Belgravia
Decision by
Delegated Decision
Postcode
SW1X 8BP

Site history

Applications at this address on the Westminster register

This site has had 3 applications since 2025: 1 approved, 1 refused.

  • 26/05198/LBC Decided

    Basement And Ground Floor Maisonette 21 Eaton Place London SW1X 8BP

    Replacement of external door at lower ground floor level.

    Submitted 31 Jul 2026 Heritage and listed buildings
  • 26/00152/LBC Refused

    Basement And Ground Floor Maisonette 21 Eaton Place London SW1X 8BP

    Replacement of external door at Lower Ground Floor level and installation of external security gate in front.

    Decided 2 Apr 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 15 Sep 2025

    Received by Westminster

  2. 30 Oct 2025

    Decision issued: Application Permitted

  3. 21 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Castle Planning Agent, a planning consultancy registered in Berkhamsted

Active · incorporated 2015 · Berkhamsted

8 applications on PlanIndex · across 4 councils

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

16 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.

Trade members open them from here.

Open the documents

What this grant of permission means

Westminster granted permission on 30 October 2025, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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 500 metres

  • Basement And Ground Floor Maisonette 21 Eaton Place London SW1X 8BP

    26/00152/LBC Submitted 12 Jan 2026 1m away

    Replacement of external door at Lower Ground Floor level and installation of external security gate in front.

    Refused Heritage and listed buildings 14 docs

  • 21 Eaton Place London SW1X 8BP

    26/04818/CLLB Submitted 20 Jul 2026 4m away

    89% historically approved · decision due ~21 Sep

    Like for like remedial after exposure works.

    Awaiting decision 16 docs

  • Flat 1 23 Eaton Place London SW1X 8BP

    26/02822/LBC Submitted 29 Apr 2026 9m away

    90% historically approved · decision due ~24 Jun

    Erection of single-story rear extension and associated works.

    Awaiting decision Heritage and listed buildings Extension 14 docs

  • Flat 1 23 Eaton Place London SW1X 8BP

    26/02821/FULL Submitted 29 Apr 2026 9m away

    87% historically approved · decision due ~24 Jun

    Erection of single-story rear extension and associated works.

    Awaiting decision Full applications Extension 18 docs

  • Basement And Ground Floor Maisonette 21 Eaton Place London SW1X 8BP

    26/05198/LBC Submitted 31 Jul 2026 17m away

    90% historically approved · decision due ~25 Sep

    Replacement of external door at lower ground floor level.

    Decided Heritage and listed buildings

  • 34 Belgrave Mews South London SW1X 8BT

    25/08400/ADFULL Submitted 17 Nov 2025 22m away

    87% historically approved · decision due ~16 Jan

    Details of a validation report pursuant to condition 5 (4) of planning permission dated 8th February 2024 (RN:23/08449/FULL)

    Awaiting decision Full applications 7 docs

In Westminster

  • 26/06250/LBC Awaiting decision

    53 Wimpole Street London W1G 8YH

    Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06249/FULL)

    11 Sep 2026 Heritage and listed buildings
  • 26/06203/LBC Awaiting decision

    106 Blandford Street London W1U 8AG

    Installation of two roof-mounted anchor posts. (Linked to 26/06202/FULL)

    10 Sep 2026 Heritage and listed buildings
  • 26/06187/LBC Awaiting decision

    4 Shepherd Market London W1J 7QB

    Installation of wall mounted highway street light on to the facade of 4 Shepherd Market.

    10 Sep 2026 Heritage and listed buildings
  • 26/06216/LBC Awaiting decision

    208 Regent Street London W1B 5BD

    Strip-out of existing, modern retail unit fixtures, fittings, stair and services, with retention of heritage and listed features, including shopfront and entrances, and ground floor ceiling details and features. Fit-out of new retail fittings, fixtures and services. Retention of shopfront with new 'like-for-like' signage and a new flag pole.

    10 Sep 2026 Heritage and listed buildings
  • 26/06176/LBC Awaiting decision

    46 Gloucester Place London W1U 8HG

    Installation of 1,100 mm high protective railings along the existing roof-level access walkway. (Linked to 26/06178/FULL)

    9 Sep 2026 Heritage and listed buildings