63 Blandford Street London W1U 7HR

This site has had 4 applications since 2025: 2 approved, 0 refused.

• 26/06137/LBC Awaiting decision

  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)

  Submitted 8 Sep 2026 Heritage and listed buildings
• 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).

  Submitted 28 Jul 2026 Full applications
• 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)

  Decided 3 Nov 2025 Heritage and listed buildings

1. 27 Jun 2025

   Received by Westminster

2. 5 Aug 2025

   Validated

   Checked as complete and ready for consideration.

3. 3 Nov 2025

   Decision issued: Application Permitted

4. 30 Aug 2026

   Added to PlanIndex

• 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)

  Decided 3 Nov 2025 Heritage and listed buildings

2 later applications on the register refer to this one:

• 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).

  Submitted 28 Jul 2026 Full applications
• 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)

  Decided 3 Nov 2025 Heritage and listed buildings

Westminster granted permission on 3 November 2025, 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.

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.

• 63 Blandford Street London W1U 7HR

  25/04450/LBC Submitted 27 Jun 2025 50 yards away

  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

  25/04451/FULL Submitted 27 Jun 2025 50 yards away

  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

  25/04452/LBC Submitted 27 Jun 2025 50 yards away

  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

• 63 Blandford Street London W1U 7HR

  26/05078/ADFULL Submitted 28 Jul 2026 50 yards away

  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

  26/06137/LBC Submitted 8 Sep 2026 50 yards away

  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)

  Awaiting decision Heritage and listed buildings Extension Loft or dormer +1

• 22 Baker Street London W1U 3BW

  22/05111/ADFULL Submitted 27 Jul 2022 50 yards away

  Details pursuant to Condition 5 & 6 of planning permission dated 22nd April 2022 (RN: 22/01420/FULL), namely the submission of details drawings of the rooflights and PV panels at main roof level.

  Granted Full applications Loft or dormer 9 docs

• 26/05984/FULL Decided

  41 Sutherland Street London SW1V 4JX

  Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

  Received 2 Sep, published by the council 11 Sep 2026 Full applications
• 26/07224/FULL Awaiting decision

  8 Hinde Street London W1U 3BQ

  Use of the building as an Embassy (sui generis) with reversion to Class E on cessation of occupation by the Government of the United Mexican States. Erection of a flagpole and flag and plaque

  Received 22 Oct, published by the council 26 Oct 2026 Full applications
• 26/06134/FULL Decided

  Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

  Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

  Received 8 Sep, published by the council 15 Sep 2026 Full applications
• 26/07258/FULL Awaiting decision

  16A Croxley Road London W9 3HL

  Installation of air to air heat pumps to offices and bedrooms.

  Received 22 Oct, published by the council 23 Oct 2026 Full applications
• 26/07193/FULL Awaiting decision

  98 Victoria Street London SW1E 5JL

  Shopfront alterations. (Linked with 26/07194/ADV)

  Received 21 Oct, published by the council 22 Oct 2026 Full applications