26 St Marys Mansions St Mary's Terrace London W2 1SQ

This site has had 2 applications since 2025: 1 approved, 0 refused.

• 26/06397/NMA Awaiting decision

  26 St Marys Mansions St Mary's Terrace London W2 1SQ

  Amendments to planning permission dated 01 April 2026 (RN: 25/09249/FULL) for the: Replacement of all timber double-glazed windows at first floor level and installation of new air brick and flue to rear elevation. NAMELY, to allow the addition of A/C grilles to elevations.

  Submitted 18 Sep 2026 Amendments

1. 22 Dec 2025

   Received by Westminster

2. 1 Apr 2026

   Decision issued: Application Permitted

3. 20 Jul 2026

   Added to PlanIndex

1 later application on the register refers to this one:

• 26/06397/NMA Awaiting decision

  26 St Marys Mansions St Mary's Terrace London W2 1SQ

  Amendments to planning permission dated 01 April 2026 (RN: 25/09249/FULL) for the: Replacement of all timber double-glazed windows at first floor level and installation of new air brick and flue to rear elevation. NAMELY, to allow the addition of A/C grilles to elevations.

  Submitted 18 Sep 2026 Amendments

Westminster granted permission on 1 April 2026, 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.

• 26 St Marys Mansions St Mary's Terrace London W2 1SQ

  26/06397/NMA Submitted 18 Sep 2026 50 yards away

  93% historically approved · decision due ~13 Nov

  Amendments to planning permission dated 01 April 2026 (RN: 25/09249/FULL) for the: Replacement of all timber double-glazed windows at first floor level and installation of new air brick and flue to rear elevation. NAMELY, to allow the addition of A/C grilles to elevations.

  Awaiting decision Amendments Windows or glazing

• St Marys Mansions St Mary's Terrace London W2 1SQ

  25/06446/FULL Submitted 9 Sep 2025 50 yards away

  Retention of four roof space access hatch/doors to facilitate building maintenance

  Granted Full applications 18 docs

• 1 St Mary's Terrace London W2 1SU

  26/07283/FULL Submitted 23 Oct 2026 100 yards away

  88% historically approved · decision due ~18 Dec

  Removal of the existing roof, dismantling of existing chimneys and pots and erection of a single storey mansard extension, reinstatement of chimneys and pots with accompanying external terrace, rooflights and balustrade to the rear elevation, and dormer windows to the front elevation.

  Awaiting decision Full applications Extension Loft or dormer +1
  Small domestic

• 21 Hogan Mews London W2 1UP

  03/07919/TCA Submitted 6 Oct 2003 100 yards away

  4 x Cypress: (T1-T4), fell, 1 x Conifer: (T5), fell.

  Granted Trees 1 doc

• 8 Hogan Mews London W2 1UP

  04/08806/FULL Submitted 8 Nov 2004 100 yards away

  Construction of a single storey rear extension to existing single dwellinghouse.

  Granted Full applications Extension 11 docs
  Small domestic

• 4 Hogan Mews London W2 1UP

  07/09334/TCA Submitted 18 Oct 2007 100 yards away

  2 x Sycamores (Rear): Removal.

  Granted Trees 1 doc

• 26/07528/FULL Awaiting decision

  69 Eaton Place London SW1X 8DF

  Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

  Received 5 Nov, published by the council 6 Nov 2026 Full applications
• 26/05200/FULL Decided

  1 The Court House 165 Seymour Place London W1H 4PU

  Installation of waterproofing system to the existing lead flat roofs

  Received 3 Aug, published by the council 28 Aug 2026 Full applications
• 26/07521/FULL Awaiting decision

  Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

  Installation of one external condenser unit

  Received 4 Nov, published by the council 6 Nov 2026 Full applications
• 26/07508/FULL 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 26/07509/LBC)

  Received 4 Nov, published by the council 5 Nov 2026 Full applications
• 26/07472/FULL Awaiting decision

  Flat 3 82 New Cavendish Street London W1G 9TA

  Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

  Received 3 Nov, published by the council 6 Nov 2026 Full applications