1 Parliament Street London SW1A 2NE

This site has had 2 applications since 2026.

• 26/06876/LBC Awaiting decision

  1 Parliament Street London SW1A 2NE

  Alterations to the existing Colonnade at 1 Parliament Street, including installation of infill structures within the Colonnade arches, relocation of the frontage to the Colonnade line, associated internal alterations, stone repair and cleaning works, and associated ancillary works. (Linked with 26/06875/FULL)

  Submitted 8 Oct 2026 Heritage and listed buildings

1. 8 Oct 2026

   Received by Westminster

2. 12 Oct 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 3 December 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 86 days over the applications it decided in the last year.

• 26/06876/LBC Awaiting decision

  1 Parliament Street London SW1A 2NE

  Alterations to the existing Colonnade at 1 Parliament Street, including installation of infill structures within the Colonnade arches, relocation of the frontage to the Colonnade line, associated internal alterations, stone repair and cleaning works, and associated ancillary works. (Linked with 26/06875/FULL)

  Submitted 8 Oct 2026 Heritage and listed buildings

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.

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.

• Parliamentary Estate Parliament Street London SW1A 2NU

  26/05113/NMA Submitted 29 Jul 2026 50 yards away

  93% historically approved · decision due ~23 Sep

  Amendments to planning permission dated 17 July 2026 (RN: 26/03093/FULL) for excavation of trial trenches within and adjacent to the Northern Parliamentary Estate. (Linked with 26/03094/LBC); NAMELY, to reposition and alter six trial trenches.

  Decided Amendments

• 1 Parliament Street London SW1A 2NE

  26/06876/LBC Submitted 8 Oct 2026 50 yards away

  90% historically approved · decision due ~3 Dec

  Alterations to the existing Colonnade at 1 Parliament Street, including installation of infill structures within the Colonnade arches, relocation of the frontage to the Colonnade line, associated internal alterations, stone repair and cleaning works, and associated ancillary works. (Linked with 26/06875/FULL)

  Awaiting decision Heritage and listed buildings Extension

• Parliamentary Estate Parliament Street London SW1A 2NU

  26/02699/FULL Submitted 23 Apr 2026 50 yards away

  88% historically approved · decision due ~18 Jun

  Installation of a borehole and associated works, including plant and pipework, with internal basement alterations and temporary works (Linked to 26/02700/LBC)

  Awaiting decision Full applications 1 doc

• Parliamentary Estate Parliament Street London SW1A 2NU

  26/02700/LBC Submitted 23 Apr 2026 50 yards away

  90% historically approved · decision due ~18 Jun

  Installation of a borehole and associated works, including plant and pipework, with internal basement alterations and temporary works (Linked to 26/02699/FULL)

  Awaiting decision Heritage and listed buildings 1 doc

• Parliamentary Estate Parliament Street London SW1A 2NU

  26/03093/FULL Submitted 11 May 2026 50 yards away

  88% historically approved · decision due ~6 Jul

  Excavation of trial trenches within and adjacent to the Northern Parliamentary Estate. (Linked with 26/03094/LBC)

  Awaiting decision Full applications 5 docs

• Parliamentary Estate Parliament Street London SW1A 2NU

  26/03094/LBC Submitted 11 May 2026 50 yards away

  90% historically approved · decision due ~6 Jul

  Excavation of trial trenches within and adjacent to the Northern Parliamentary Estate. (Linked with 26/03093/FULL)

  Awaiting decision Heritage and listed buildings 3 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
• 26/06134/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
• 26/07187/FULL Awaiting decision

  Ground Floor Flat 151 Portnall Road London W9 3BN

  Erection of a single storey rear extension.

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