Planning application
63 Blandford Street London W1U 7HR
Works: Extension Loft or dormer Windows or glazing
Relates to 25/04449/FULL
Decided. The decision notice on the council portal carries the outcome in full, including any conditions.
Proposal
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 and and a reduction in glazing bars from the consented scheme 6 over 6 to 2 over 2. (Application under section 73 of the Act).
As published by the council, reference 26/04651/FULL
Application record
- Reference
- 26/04651/FULL
- Category
- Full applications
- Status
- Decided
- Received
- 10 Jul 2026
- Validated
- 8 Sep 2026
- Postcode
- W1U 7HR
Site history
Applications at this address on the Westminster register
This site has had 5 applications since 2025: 2 approved, 0 refused.
-
26/06137/LBC Decided
63 Blandford Street London W1U 7HR
Erection of mansard roof extension, including 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. (Linked to 26/04651/FULL)
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26/05078/ADFULL Awaiting decision
63 Blandford Street London W1U 7HR
Details of written photographic specification of the materials; exterior of the new extension; new windows, rooflights, and doors; new roof balustrade to rear; and new solar panels pursuant to conditions 4 and 5 of planning permission dated 03 November 2025 (RN: 25/04449/FULL).
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25/04450/LBC Granted
63 Blandford Street London W1U 7HR
Erection of mansard roof extension with three new front dormers, one dormer window (replace existing) and one dormer door to the rear, 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 (Linked to 25/04449/FULL)
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25/04449/FULL Granted
63 Blandford Street London W1U 7HR
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. (Linked to 25/04450/LBC)
Timeline
Dates from the published record
-
10 Jul 2026
Received by Westminster
-
8 Sep 2026
Validated
Checked as complete and ready for consideration.
-
4 Nov 2026
Added to PlanIndex
Related applications
Cases linked to this one on the register
-
25/04449/FULL Granted
63 Blandford Street London W1U 7HR
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. (Linked to 25/04450/LBC)
After the decision
Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. 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
-
63 Blandford Street London W1U 7HR
90% historically approved · decision due ~3 Nov
Erection of mansard roof extension, including 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. (Linked to 26/04651/FULL)
Decided Heritage and listed buildings Extension Loft or dormer +1 -
63 Blandford Street London W1U 7HR
88% historically approved · decision due ~22 Sep
Details of written photographic specification of the materials; exterior of the new extension; new windows, rooflights, and doors; new roof balustrade to rear; and new solar panels pursuant to conditions 4 and 5 of planning permission dated 03 November 2025 (RN: 25/04449/FULL).
Awaiting decision Full applications Extension Loft or dormer +2 10 docs -
63 Blandford Street London W1U 7HR
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. (Linked to 25/04450/LBC)
Granted Full applications Extension Loft or dormer +1 32 docs -
63 Blandford Street London W1U 7HR
Erection of mansard roof extension with three new front dormers, one dormer window (replace existing) and one dormer door to the rear, 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 (Linked to 25/04449/FULL)
Granted Heritage and listed buildings Extension Loft or dormer +1 33 docs -
63 Blandford Street City Of Westminster London W1U 7HR
Erection of mono-pitched and sheer roof extension to rear with two sash windows and a single timber door to the rear, raise chimney height by 330mm, installation of six over six pane slimline double glazed timber sash windows and installation of new roof top photovoltaic panels and associated internal alterations. (Linked to 25/04452/LBC)
Granted Full applications Extension Roofing +1 33 docs -
63 Blandford Street City Of Westminster London W1U 7HR
Erection of mono-pitched and sheer roof extension to rear with two sash windows and a single timber door to the rear, raise chimney height by 330mm, installation of six over six pane slimline double glazed timber sash windows and installation of new roof top photovoltaic panels and associated internal alterations. (Linked to 25/04451/FULL)
Granted Heritage and listed buildings Extension Roofing +1 31 docs
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