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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
Granted As published: 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

11 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.

Watch members (£5 a month) open the document list 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 0.3 miles

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

    26/00152/LBC Submitted 12 Jan 2026 50 yards 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 50 yards 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 50 yards 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 50 yards away

    88% 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 50 yards 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 50 yards away

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

    Granted Full applications 10 docs

In Westminster

  • 26/05473/LBC Decided

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/06273/FULL)

    Received 12 Aug, published by the council 22 Sep 2026 Heritage and listed buildings
  • 26/07390/LBC Awaiting decision

    40 Wigmore Street London W1U 2RX

    Installation of a non-illuminated fascia sign measuring 0.29m x 0.79m and two vinyl signs applied to inside face of the glazed shopfront each measuring 0.22m x 0.84m. (Linked with 26/06970/ADV)

    29 Oct 2026 Heritage and listed buildings
  • 26/07372/LBC Awaiting decision

    8A Randolph Road London W9 1AN

    Amalgamation of two residential units with internal refurbishment and reconfiguration. (Linked with 26/07371/FULL)

    Received 28 Oct, published by the council 2 Nov 2026 Heritage and listed buildings
  • 26/07332/LBC Awaiting decision

    Royal Courts Of Justice Strand London WC2A 2LL

    Replacement of one platform lift within the grade 1 listed Royal Court?s of Justice building.

    Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings
  • 26/07336/LBC Awaiting decision

    Charing Cross Hotel Strand London WC2N 5HX

    Installation of replacement timber handrail and brackets to one flight of main staircase.

    Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings