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Variation of Condition 1 of planning permission dated 3rd November 2025 (25/04449/FULL) for: Erection of mansard roof extension with three new front dormers, two rear dormers (one dormer window and one dormer door), raising height of chimney by 330mm, installation of 6 over 6 pane slimline double glazed timber sash windows, installation of photovoltaic panels at roof level. NAMELY, to allow raising of the chimney stack to retain the same height relationship to the roof; formation of a brick party wall; provision of dormer windows to match neighbouring dormer profiles; alteration of the rear dormers to casement doors; and alteration to the proposed stair to the fourth floor.

63 Blandford Street London W1U 7HR

PendingReference: 26/04651/FULLCity of Westminster

Last published check: 20 Sept 2026, 16:33. Check the council record for more recent changes.

Application location

63 Blandford Street London W1U 7HR

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Application summary

Status
Pending
Application type
Full Planning Permission Application
Received
10 Jul 2026
Validated
8 Sept 2026
Determination deadline
Not published
Local authority
City of Westminster

Application overview

Variation of Condition 1 of planning permission dated 3rd November 2025 (25/04449/FULL) for: Erection of mansard roof extension with three new front dormers, two rear dormers (one dormer window and one dormer door), raising height of chimney by 330mm, installation of 6 over 6 pane slimline double glazed timber sash windows, installation of photovoltaic panels at roof level. NAMELY, to allow raising of the chimney stack to retain the same height relationship to the roof; formation of a brick party wall; provision of dormer windows to match neighbouring dormer profiles; alteration of the rear dormers to casement doors; and alteration to the proposed stair to the fourth floor.

Proposal details

Reference
26/04651/FULL
Alternative references
PP-15074999
Ward
Marylebone
Agent
Studio Act

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Documents 34 of 34

DocumentPublishedAction
2ND INVALID LETTERBackground Papers · PDF9 Sept 2026View
ISSUE SHEETSBackground Papers · PDF4 Sept 2026View
PROPOSED VARIATIONS FRONT ELEVATIONDrawing · PDF4 Sept 2026View
AS CONSENTED PLANSDrawing · PDF4 Sept 2026View
PROPOSED VARIATIONS REAR ELEVATIONDrawing · PDF4 Sept 2026View
PROPOSED VARIATIONS FRONT ELEVATIONDrawing · PDF4 Sept 2026View
AS CONSENTED ELEVATIONDrawing · PDF4 Sept 2026View
AS CONSENTED ELEVATIONDrawing · PDF4 Sept 2026View
SUPPORTING DOCUMENT REVABackground Papers · PDF4 Sept 2026View
DESIGN AND HERITAGE STATEMENTDesign and Access Statement · PDF4 Sept 2026View
2ND INVALID LETTERBackground Papers · PDF7 Aug 2026View
SUPPORTING STATEMENTOther · PDF4 Aug 2026View
PROPOSED VARIATIONS REAR ELEVATIONSuperseded document · PDF28 Jul 2026View
PROPOSED VARIATIONS FRONT ELEVATIONSuperseded document · PDF28 Jul 2026View
ISSUE SHEETOther · PDF28 Jul 2026View
PROPOSED VARIATIONS FRONT ELEVATIONSuperseded document · PDF28 Jul 2026View
RECEIPT OF APPLICATIONOther · PDF14 Jul 2026View
1ST INVALID LETTERBackground Papers · PDF14 Jul 2026View
APPLICATIONFORMREDACTEDSuperseded document · PDF10 Jul 2026View
ISSUE SHEETSuperseded document · PDF10 Jul 2026View
PROPOSED VARIATIONS FRONT ELEVATIONSuperseded document · PDF10 Jul 2026View
PROPOSED VARIATIONS FRONT ELEVATIONSuperseded document · PDF10 Jul 2026View
PROPOSED VARIATIONS REAR ELEVATIONSuperseded document · PDF10 Jul 2026View
PROPOSED REPLACEMENT WINDOW DETAILSSuperseded document · PDF10 Jul 2026View
PROPOSED FRONT DORMER WINDOW DETAILSSuperseded document · PDF10 Jul 2026View
PROPOSED REAR DORMER WINDOW DETAILSSuperseded document · PDF10 Jul 2026View
LOFT EXTENSION SECTIONS AND ROOF PLANSuperseded document · PDF10 Jul 2026View
PROPOSED LOFT EXTENSION ELEVATIONSSuperseded document · PDF10 Jul 2026View
MATERIAL SPECIFICATION 01Superseded document · PDF10 Jul 2026View
MATERIAL SPECIFICATION 02Superseded document · PDF10 Jul 2026View
AS CONSENTED PLANS: OPTION A PROPOSED FLOOR PLANSSuperseded document · PDF10 Jul 2026View
AS CONSENTED: OPTION A PROPOSED FRONT ELEVATIONOther · PDF10 Jul 2026View
AS CONSENTED: OPTION A PROPOSED REAR ELEVATIONSuperseded document · PDF10 Jul 2026View
SUPPORTING DOCUMENTSuperseded document · PDF10 Jul 2026View

Documents open on the council website. Browse council documents if a link has changed.

Application timeline

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  1. Application Received Date

    Published milestoneCouncil source

  2. Application Validated Date

    Published milestoneCouncil source

  3. Target Date

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    Council source

Decision & conditions

Decision not yet published
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