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Planning application

4 Biddulph Road London W9 1JB

Granted Westminster 25/07165/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

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.

As published by the council, reference 25/07165/FULL

Application record

Reference
25/07165/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
3 Oct 2025
Validated
3 Oct 2025
Decided
13 Feb 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 9 applications since 2025: 2 approved, 1 refused.

  • 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
  • 25/08498/FULL Granted

    4 Biddulph Road London W9 1JB

    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.

    Decided 12 Jun 2026 Full applications

Timeline

Dates from the published record

  1. 3 Oct 2025

    Received by Westminster

  2. 13 Feb 2026

    Decision issued: Application Permitted

  3. 21 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

3 later applications on the register refer to this one:

  • 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

Who's behind it

Company information only, from the register and Companies House

23 Architecture + Interiors Agent, an architecture practice

1 application on PlanIndex

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

18 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 grant of permission means

Westminster granted permission on 13 February 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

    25/08498/FULL Submitted 20 Nov 2025 50 yards away

    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.

    Granted Full applications Extension Loft or dormer +1 35 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 condition 6 and 8 of planning permission dated 4th September 2025 (25/02833/FULL)

    Awaiting decision

  • 4 Biddulph Road London W9 1JB

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

    87% 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

    26/04221/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

  • 4 Biddulph Road London W9 1JB

    26/02504/ADFULL Submitted 16 Apr 2026 50 yards away

    87% historically approved · decision due ~11 Jun

    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).

    Awaiting decision Full applications Extension Trees 9 docs

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront.

    Received 15 Sep, published by the council 17 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.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06287/FULL Awaiting decision

    Barness Court 6 - 8 Westbourne Terrace London W2 3UW

    Installation of a new riser as per GW10 design comprising a single riser with 7 entries and 9 Taylor valves to be installed. (Linked with 26/06288/LBC)

    Received 14 Sep, published by the council 21 Sep 2026 Full applications
  • 26/06278/FULL Awaiting decision

    40 Wellington Road London NW8 9TJ

    Installation of a new external access ramp/slope to provide accessibility to the Barclays bank ATM.

    Received 14 Sep, published by the council 21 Sep 2026 Full applications
  • 26/06269/FULL Awaiting decision

    Maisonette Basement And Ground Floor 101 Hereford Road London W2 5BB

    Amalgamation of existing lower ground and ground floor maisonette to with the first floor flat to create a single dwelling and associated internal works including creation of a staircase. (Linked with 26/06270/LBC)

    Received 14 Sep, published by the council 21 Sep 2026 Full applications