Subway Parliament Street/Parliament Square London

1. 15 Jun 2023

   Received by Westminster

2. 10 Aug 2023

   Decision issued: Application Permitted

3. 14 Sep 2026

   Added to PlanIndex

Westminster granted permission on 10 August 2023, 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.

• Open Space Parliament Square London SW1A 0AA

  22/03863/FULL Submitted 14 Jun 2022 50 yards away

  Use of an area of land to the rear of Westminster Station Underground entrance/exit on the northeast of Parliament Street for the placement (daytime) of an Ambassador information pod for a temporary period from 03 August 2022 to 04 September 2022.

  Granted Full applications 10 docs

• 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

  26/05113/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

• 1 Parliament Street London SW1A 2NE

  26/06875/FULL Submitted 8 Oct 2026 50 yards away

  88% 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 26/06876/LBC)

  Awaiting decision Full applications Extension

• 26/06015/FULL Decided

  129 Saltram Crescent London W9 3JT

  Erection of a two-storey rear extension.

  Received 3 Sep, published by the council 11 Sep 2026 Full applications
• 26/05689/FULL Decided

  Flat 1 12 Bristol Gardens London W9 2JG

  Demolition of an existing conservatory at the rear at lower ground level and erection of single storey rear extension.

  Received 19 Aug, published by the council 14 Sep 2026 Full applications
• 26/07361/FULL Awaiting decision

  29 Alexander Street London W2 5NU

  Change of the existing ground and lower ground floors from Use Class E(g)(i) (Commercial business and service) to Class C3 dwelling with the creation of a two-bedroom maisonette with associated external alterations.

  Received 27 Oct, published by the council 2 Nov 2026 Full applications
• 26/07360/FULL Awaiting decision

  11 Marylebone Mews London W1G 8PX

  Variation of condition 1 of planning permission dated 02 July 2026 (RN 26/00802/FULL) for the Erection of a mansard roof extension, excavation and extension of the existing basement, installation of plant within a louvered acoustic enclosure on the rear flat roof at second floor and the replacement of the fenestration to the front and rear of the building; all to enlarge and alter dwellinghouse (Class C3). NAMELY, amendments to layout in bedroom at the front of the floor plan where it would benefit from two of the windows that overlook the Mews, with the bathroom at the back of the mid-section of the floor plan with access to one of the wardrobe spaces.

  Received 27 Oct, published by the council 2 Nov 2026 Full applications
• 26/07340/FULL Awaiting decision

  123 Victoria Street London SW1E 6DE

  Installation of a single-leaf glazed entrance door at ground level to the Victoria Street frontage

  Received 27 Oct, published by the council 30 Oct 2026 Full applications