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Planning application

3 Wilton Street London SW1X 7AF

Refused Westminster 25/08750/FULL Full Planning Permission Application

Works: Extension Loft or dormer

Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.

Proposal

Erection of a mansard roof extension.

As published by the council, reference 25/08750/FULL

Application record

Reference
25/08750/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Application Refused
Received
1 Dec 2025
Validated
1 Dec 2025
Decided
17 Apr 2026
Ward
Knightsbridge & Belgravia
Decision by
Delegated Decision
Postcode
SW1X 7AF

Site history

Applications at this address on the Westminster register

This site has had 5 applications since 2025: 1 approved, 4 refused.

  • 25/08751/LBC Refused

    3 Wilton Street London SW1X 7AF

    Erection of a mansard roof extension and internal alterations to third floor level.

    Decided 17 Apr 2026 Heritage and listed buildings
  • 25/06550/FULL Refused

    3 Wilton Street London SW1X 7AF

    Installation of security bars to front windows of basement and ground floors.

    Decided 20 Feb 2026 Full applications
  • 25/06551/LBC Refused

    3 Wilton Street London SW1X 7AF

    Installation of security bars to front windows of basement and ground floors.

    Decided 20 Feb 2026 Heritage and listed buildings
  • 25/05488/LBC Granted

    3 Wilton Street London SW1X 7AF

    Alterations to basement and ground floors including conversion of lounge to a bedroom and dressing room and other internal alterations.

    Decided 18 Sep 2025 Heritage and listed buildings

Timeline

Dates from the published record

  1. 1 Dec 2025

    Received by Westminster

  2. 17 Apr 2026

    Decision issued: Application Refused

  3. 1 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Redmond Ivie Architects Agent, an architecture practice

36 applications on PlanIndex · across 8 councils · 69% granted

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Documents

Plans, drawings, consultee responses and the officer's report

20 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.

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What this refusal means

Westminster refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 3 Wilton Street London SW1X 7AF

    25/08751/LBC Submitted 1 Dec 2025 0m away

    Erection of a mansard roof extension and internal alterations to third floor level.

    Refused Heritage and listed buildings Extension Loft or dormer 15 docs

  • 3 Wilton Street London SW1X 7AF

    25/05488/LBC Submitted 5 Aug 2025 3m away

    Alterations to basement and ground floors including conversion of lounge to a bedroom and dressing room and other internal alterations.

    Granted Heritage and listed buildings 18 docs

  • 3 Wilton Street London SW1X 7AF

    25/06550/FULL Submitted 12 Sep 2025 4m away

    Installation of security bars to front windows of basement and ground floors.

    Refused Full applications Windows or glazing 28 docs

  • 3 Wilton Street London SW1X 7AF

    25/06551/LBC Submitted 12 Sep 2025 5m away

    Installation of security bars to front windows of basement and ground floors.

    Refused Heritage and listed buildings Windows or glazing 21 docs

  • 6 Wilton Street London SW1X 7AF

    26/01240/LBC Submitted 26 Feb 2026 16m away

    90% historically approved · decision due ~23 Apr

    Partial demolition at rear basement, ground and closet wing; extension at rear basement & ground floor with terrace and lantern rooflight over; rebuilding of closet wing with additional storey; replacement windows at rear; internal alterations. (Linked to 26/01239/FULL)

    Awaiting decision Heritage and listed buildings Extension Loft or dormer +2 27 docs

  • 6 Wilton Street London SW1X 7AF

    26/01274/LBC Submitted 27 Feb 2026 16m away

    90% historically approved · decision due ~24 Apr

    Removal of existing roof and rear third floor mansard and replacement with fourth floor mansard extension; replacement of front third floor windows and new rear third floor windows; internal alterations. [Linked to 26/01273/FULL]

    Awaiting decision Heritage and listed buildings Extension Loft or dormer +1 38 docs

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront.

    15 Sep 2026 Full applications
  • 26/06297/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Alterations to rear elevation at basement level comprising repolacement window and installation of double opening door.

    15 Sep 2026 Full applications
  • 26/06234/FULL Awaiting decision

    40 Grosvenor Place London SW1X 7HJ

    Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

    11 Sep 2026 Full applications
  • 26/06249/FULL 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 26/06250/LBC)

    11 Sep 2026 Full applications
  • 26/03576/FULL Decided

    15A Devonshire Terrace London W2 3DW

    Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

    1 Jun 2026 Full applications