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Planning application

12 Denbigh Street London SW1V 2ER

Granted Westminster 25/09106/FULL Full Planning Permission Application

Works: Extension Loft or dormer Windows or glazing

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

Proposal

Erection of mansard roof extension and alterations to the front and rear elevations including changes to the windows and to rear closet wing.

As published by the council, reference 25/09106/FULL

Application record

Reference
25/09106/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
16 Dec 2025
Validated
16 Dec 2025
Decided
20 Mar 2026
Ward
Pimlico North
Decision by
Delegated Decision
Postcode
SW1V 2ER

Site history

Applications at this address on the Westminster register

This site has had 2 applications since 2025: 1 approved, 0 refused.

  • 26/07028/ADFULL Awaiting decision

    12 Denbigh Street London SW1V 2ER

    Samples of facing materials you will use, including glazing, and elevations and roof plans. Detailed of new dormers to be no wider or larger than the windows. Detailed drawings of doors, windows and dormers including key junctions; pursuant to condition 3, 4 and 5 of planning permission dated 20th March 2026 (25/09106/FULL)

    Submitted 14 Oct 2026

Timeline

Dates from the published record

  1. 16 Dec 2025

    Received by Westminster

  2. 20 Mar 2026

    Decision issued: Application Permitted

  3. 20 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/07028/ADFULL Awaiting decision

    12 Denbigh Street London SW1V 2ER

    Samples of facing materials you will use, including glazing, and elevations and roof plans. Detailed of new dormers to be no wider or larger than the windows. Detailed drawings of doors, windows and dormers including key junctions; pursuant to condition 3, 4 and 5 of planning permission dated 20th March 2026 (25/09106/FULL)

    Submitted 14 Oct 2026

Who's behind it

Company information only, from the register and Companies House

The Plannery Ltd Agent, registered in Woodford Green

Active · incorporated 2023 · Woodford Green

3 applications on PlanIndex · across 3 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

21 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 20 March 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

  • 9 Churton Place London SW1V 2LN

    25/07726/FULL Submitted 24 Oct 2025 50 yards away

    Erection of a mansard roof extension to replace the existing butterfly roof, including the addition of dormer windows to the rear and front elevations and the installation of a roof light.

    Refused Full applications Extension Loft or dormer +1 25 docs
  • 12 Denbigh Street London SW1V 2ER

    26/07028/ADFULL Submitted 14 Oct 2026 50 yards away

    89% historically approved · decision due ~30 Dec

    Samples of facing materials you will use, including glazing, and elevations and roof plans. Detailed of new dormers to be no wider or larger than the windows. Detailed drawings of doors, windows and dormers including key junctions; pursuant to condition 3, 4 and 5 of planning permission dated 20th March 2026 (25/09106/FULL)

    Awaiting decision Loft or dormer Windows or glazing
  • 36A Tachbrook Street London SW1V 2JS

    26/02676/FULL Submitted 22 Apr 2026 50 yards away

    88% historically approved · decision due ~17 Jun

    Installation of replacement shopfront inlcuding signage; and other associated works. (Retrospective) Linked with 26/02677/ADV

    Awaiting decision Full applications Windows or glazing 6 docs
  • 36A Tachbrook Street London SW1V 2JS

    26/02677/ADV Submitted 22 Apr 2026 50 yards away

    82% historically approved · decision due ~17 Jun

    Display of one non illuminaed fascia sign measuring 0.6m x 4.88m and one non illuminated projecting sign measuring 450m x 450m. (Retrospective) Linked with 26/02676/FULL

    Awaiting decision Advertising 6 docs
  • Basement And Ground Floor 16 Warwick Way London SW1V 1RX

    25/06385/FULL Submitted 8 Sep 2025 50 yards away

    Installation of kitchen extract duct at ground floor level with external discharge grill at basement level to rear services yard.

    Granted Full applications 21 docs
  • Basement And Ground Floor 16 Warwick Way London SW1V 1RX

    26/02078/ADV Submitted 30 Mar 2026 50 yards away

    Display of an externally illuminated fascia sign measuring 0.75m x 4.3m; and an externally illuminated projecting sign measuring 0.61m x 1.3m.

    Granted Advertising 5 docs

In Westminster

  • 26/07528/FULL Awaiting decision

    69 Eaton Place London SW1X 8DF

    Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

    Received 5 Nov, published by the council 6 Nov 2026 Full applications
  • 26/05200/FULL Decided

    1 The Court House 165 Seymour Place London W1H 4PU

    Installation of waterproofing system to the existing lead flat roofs

    Received 3 Aug, published by the council 28 Aug 2026 Full applications
  • 26/07521/FULL Awaiting decision

    Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

    Installation of one external condenser unit

    Received 4 Nov, published by the council 6 Nov 2026 Full applications
  • 26/07508/FULL Awaiting decision

    Buckingham Palace The Mall London SW1A 1AA

    Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

    Received 4 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07472/FULL Awaiting decision

    Flat 3 82 New Cavendish Street London W1G 9TA

    Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

    Received 3 Nov, published by the council 6 Nov 2026 Full applications