Planning application
63 Blandford Street London W1U 7HR
Works: Extension Loft or dormer Windows or glazing
Relates to 25/04450/LBC
Decided. The decision notice on the council portal carries the outcome in full, including any conditions.
Proposal
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)
As published by the council, reference 26/06137/LBC
Application record
- Reference
- 26/06137/LBC
- Category
- Heritage and listed buildings
- Status
- Decided
- Received
- 8 Sep 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.
-
26/05078/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).
-
26/04651/FULL Decided
63 Blandford Street London W1U 7HR
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).
-
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)
-
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
-
8 Sep 2026
Received by Westminster
-
17 Sep 2026
Added to PlanIndex
-
4 Nov 2026
Status changed to Decided
Previously Pending.
Related applications
Cases linked to this one on the register
-
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)
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 heritage and listed building applications
Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
63 Blandford Street London W1U 7HR
88% historically approved · decision due ~3 Nov
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).
Decided Full applications 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
Other heritage and listed building applications
In Westminster
-
26/07529/LBC Awaiting decision
69 Eaton Place London SW1X 8DF
Installation of new cast iron water supply pipe on rear courtyard elevation. (Linked with 26/07528/FULL)
-
26/07509/LBC 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 26/07508/FULL)
-
26/07473/LBC Awaiting decision
Flat 3 82 New Cavendish Street London W1G 9TA
Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07472/FULL)
-
26/07471/LBC Awaiting decision
12 Queen Anne's Gate London SW1H 9AA
Excavation of single-storey basement, internal reconfiguration and installation of modern services. (Linked with 26/07470/FULL)
-
26/07461/LBC Awaiting decision
1 Savile Row London W1S 3JR
Minor internal works comprising redecoration and upgrades to lighting, flooring and bathroom and kitchen facilities, together with external works including new lighting and signage.