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Planning application

4 Biddulph Road London W9 1JB

Granted Westminster 25/08498/FULL Full Planning Permission Application

Works: Extension Loft or dormer Windows or glazing Small domestic

Read from the description, not a valuation. How we read the register

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

Proposal

Erection of rear extensions at ground and first floor levels, single storey side extension at ground floor level, and rear roof dormer; Excavation to extend existing basement level with associated lightwells to front and rooflights to rear garden; installation of rooflights; Alterations to windows and doors; Creation of bin store to front garden; Landscaping works; provision of attenuation tank under part of front garden; and associated external alterations.

As published by the council, reference 25/08498/FULL

Application record

Reference
25/08498/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
20 Nov 2025
Validated
20 Nov 2025
Decided
12 Jun 2026
Ward
Maida Vale
Decision by
Complex Delegated Decision
Postcode
W9 1JB

Site history

Applications at this address on the Westminster register

This site has had 10 applications since 2025: 2 approved, 1 refused.

  • 26/07130/ADFULL Decided

    4 Biddulph Road London W9 1JB

    Details of signed Appendix A - checklist B pursuant to discharge of condition 10 of planning permission dated 12th June 2026 (RN: 25/08498/FULL).

    Submitted 19 Oct 2026
  • 26/05348/FULL Decided

    4 Biddulph Road London W9 1JB

    Variation of condition 1 of planning permission dated 13 February 2026 (RN 25/07165/FULL), which itself varied condition 1 of planning permission dated 5th June 2025 (RN 25/01845/FULL), for: "Erection of rear extensions at ground and first floor levels, single storey side extension at ground floor level, and rear roof dormer; Excavation to extend existing basement level; installation of rooflights; Alterations to windows and doors; Creation of bin store to front garden; Landscaping works; and associated external alterations." NAMELY, to allow alteration to the rear/side roof design.

    Submitted 6 Aug 2026 Full applications
  • 26/04221/ADFULL Decided

    4 Biddulph Road London W9 1JB

    Details of tree protection / void between foundations and soil, and rainwater mitigation pursuant to parial condition 10 (part A) and condition 11 of planning permission dated 05 January 2026 (RN: 25/07165/FULL)

    Submitted 25 Jun 2026
  • 26/03768/ADFULL Decided

    4 Biddulph Road London W9 1JB

    Completed Appendix A checklist from the Code of Construction Practice, signed by the applicant and approved by the Council's Environmental Sciences Team pursuant to condition 14 of planning permission dated 13th February 2026 (RN:25/07165/FULL).

    Submitted 9 Jun 2026
  • 26/02504/ADFULL Awaiting decision

    4 Biddulph Road London W9 1JB

    Details of Arboricultural Method Statement, Tree Protection Plan and drawings of the rear extension foundations pursuant to conditions 10 and 11 of planning permission dated 13th February 2026 (RN:25/07165/FULL).

    Submitted 16 Apr 2026 Full applications
  • 26/01252/ADFULL Awaiting decision

    4 Biddulph Road London W9 1JB

    Details of Evidence of CoCP pursuant to Condition 14 of planning permission dated 05 June 2025 (RN: 25/01845/FULL)

    Submitted 27 Feb 2026 Full applications
  • 26/00937/ADFULL Awaiting decision

    4 Biddulph Road London W9 1JB

    Details of Arboricultural Method Statement and Tree Protection Plan pursuant to Condition 10 of planning permission dated 05/06/2025 (RN: 25/01845/FULL)

    Submitted 13 Feb 2026 Full applications
  • 25/08561/ADFULL Refused

    4 Biddulph Road London W9 1JB

    Details of Arboricultural Method Statement and Tree Protection Plan pursuant to condition 10 of planning permission dated 05 June 2025 (RN: 25/01845/FULL).

    Decided 29 Jan 2026 Full applications
  • 25/07165/FULL Granted

    4 Biddulph Road London W9 1JB

    Variation of condition 1 of planning permission dated 5th June 2025 (RN 25/01845/FULL) for the Erection of rear extensions at ground and first floor levels, single storey side extension at ground floor level, and rear roof dormer; Excavation to extend existing basement level; installation of rooflights; Alterations to windows and doors; Creation of bin store to front garden; Landscaping works; and associated external alterations. NAMELY, amendments to the front and rear fenestration; new window to rear first floor; amendment to the dormer position; amendment to rooflights; extension of the rear gable end wall at ground and first floor levels; and a reduction of the side extension footprint to the front.

    Decided 13 Feb 2026 Full applications

Timeline

Dates from the published record

  1. 20 Nov 2025

    Received by Westminster

  2. 12 Jun 2026

    Decision issued: Application Permitted

  3. 20 Aug 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/07130/ADFULL Decided

    4 Biddulph Road London W9 1JB

    Details of signed Appendix A - checklist B pursuant to discharge of condition 10 of planning permission dated 12th June 2026 (RN: 25/08498/FULL).

    Submitted 19 Oct 2026

Who's behind it

Company information only, from the register and Companies House

23 Architecture Ltd Agent, an architecture practice registered in London

Active · incorporated 2007 · London

22 applications on PlanIndex · across 3 councils · 86% granted

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

35 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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Open the documents

What this grant of permission means

Westminster granted permission on 12 June 2026, 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 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 0.3 miles

  • 4 Biddulph Road London W9 1JB

    25/07165/FULL Submitted 3 Oct 2025 50 yards away

    Variation of condition 1 of planning permission dated 5th June 2025 (RN 25/01845/FULL) for the Erection of rear extensions at ground and first floor levels, single storey side extension at ground floor level, and rear roof dormer; Excavation to extend existing basement level; installation of rooflights; Alterations to windows and doors; Creation of bin store to front garden; Landscaping works; and associated external alterations. NAMELY, amendments to the front and rear fenestration; new window to rear first floor; amendment to the dormer position; amendment to rooflights; extension of the rear gable end wall at ground and first floor levels; and a reduction of the side extension footprint to the front.

    Granted Full applications Extension Loft or dormer +1 18 docs
    Small domestic

  • 4 Biddulph Road London W9 1JB

    26/03768/ADFULL Submitted 9 Jun 2026 50 yards away

    89% historically approved · decision due ~4 Aug

    Completed Appendix A checklist from the Code of Construction Practice, signed by the applicant and approved by the Council's Environmental Sciences Team pursuant to condition 14 of planning permission dated 13th February 2026 (RN:25/07165/FULL).

    Decided

  • 14 Biddulph Road London W9 1JB

    26/06016/ADFULL Submitted 2 Sep 2026 50 yards away

    89% historically approved · decision due ~28 Oct

    Details of a biodiversity management plan, including detailed drawings of a hard and soft landscaping scheme; pursuant to conditions 6 and 8 of planning permission dated 4th September 2025 (RN 25/02833/FULL)

    Decided

  • 4 Biddulph Road London W9 1JB

    26/05348/FULL Submitted 6 Aug 2026 50 yards away

    88% historically approved · decision due ~1 Oct

    Variation of condition 1 of planning permission dated 13 February 2026 (RN 25/07165/FULL), which itself varied condition 1 of planning permission dated 5th June 2025 (RN 25/01845/FULL), for: "Erection of rear extensions at ground and first floor levels, single storey side extension at ground floor level, and rear roof dormer; Excavation to extend existing basement level; installation of rooflights; Alterations to windows and doors; Creation of bin store to front garden; Landscaping works; and associated external alterations." NAMELY, to allow alteration to the rear/side roof design.

    Decided Full applications Extension Loft or dormer +1
    Small domestic

  • 4 Biddulph Road London W9 1JB

    26/07130/ADFULL Submitted 19 Oct 2026 50 yards away

    89% historically approved · decision due ~14 Dec

    Details of signed Appendix A - checklist B pursuant to discharge of condition 10 of planning permission dated 12th June 2026 (RN: 25/08498/FULL).

    Decided

  • 4 Biddulph Road London W9 1JB

    26/04221/ADFULL Submitted 25 Jun 2026 50 yards away

    89% historically approved · decision due ~20 Aug

    Details of tree protection / void between foundations and soil, and rainwater mitigation pursuant to parial condition 10 (part A) and condition 11 of planning permission dated 05 January 2026 (RN: 25/07165/FULL)

    Decided Trees

In Westminster

  • 26/05984/FULL Decided

    41 Sutherland Street London SW1V 4JX

    Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

    Received 2 Sep, published by the council 11 Sep 2026 Full applications
  • 26/06134/FULL Decided

    Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

    Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

    Received 8 Sep, published by the council 15 Sep 2026 Full applications
  • 26/07258/FULL Awaiting decision

    16A Croxley Road London W9 3HL

    Installation of air to air heat pumps to offices and bedrooms.

    Received 22 Oct, published by the council 23 Oct 2026 Full applications
  • 26/07193/FULL Awaiting decision

    98 Victoria Street London SW1E 5JL

    Shopfront alterations. (Linked with 26/07194/ADV)

    Received 21 Oct, published by the council 22 Oct 2026 Full applications
  • 26/07187/FULL Awaiting decision

    Ground Floor Flat 151 Portnall Road London W9 3BN

    Erection of a single storey rear extension.

    Received 21 Oct, published by the council 22 Oct 2026 Full applications