Mimosa House 12 Princes Street London W1B 2LL

This site has had 2 applications since 2026.

• 26/03074/ADFULL Awaiting decision

  Mimosa House 12 Princes Street London W1B 2LL

  Details of the pre-demolition audit in accordance with section 4.6 of the GLA's adopted Circular Economy Statement guidance shall be submitted to us and approved by us in writing; pursuant to condition 25(a) of planning permission dated 17th March 2026 (RN 24/06571/FULL)

  Submitted 11 May 2026 Full applications

1. 11 May 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 6 July 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 91 days over the applications it decided in the last year.

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.

• Mimosa House 12 Princes Street London W1B 2LL

  26/03074/ADFULL Submitted 11 May 2026 50 yards away

  88% historically approved · decision due ~6 Jul

  Details of the pre-demolition audit in accordance with section 4.6 of the GLA's adopted Circular Economy Statement guidance shall be submitted to us and approved by us in writing; pursuant to condition 25(a) of planning permission dated 17th March 2026 (RN 24/06571/FULL)

  Awaiting decision Full applications Demolition 4 docs

• 11 Princes Street London W1B 2LJ

  04/01021/AD7 Submitted 11 Feb 2004 50 yards away

  Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.6 x 0.45m.

  Granted Advertising 2 docs

• 283 Oxford Street London W1C 2DN

  04/01899/ADV Submitted 11 Mar 2004 50 yards away

  Display of halo illuminated fascia sign and projecting sign.

  Granted Advertising 4 docs

• 283 Oxford Street London W1C 2DN

  04/00461/ADV Submitted 22 Jan 2004 50 yards away

  Display of internally-illuminated fascia sign, halo-illuminated projecting sign, and full-height banner hoarding (for a 4 month period)

  Refused Advertising 6 docs

• 283 Oxford Street London W1C 2DN

  03/09662/FULL Submitted 17 Dec 2003 50 yards away

  Installation of a new shopfront, rear extension at first floor level and installation of 4 air conditioning units to rear.

  Granted Full applications Extension Windows or glazing 14 docs

• 285 Oxford Street London W1C 2DW

  26/04868/ADV Submitted 21 Jul 2026 50 yards away

  82% historically approved · decision due ~15 Sep

  Display of internally illuminated 3D detailing and graphics measuring 9.076m x 8.7m attached to the upper floors of the building for a temporary period from 31st August 2026 until 30th August 2027.

  Awaiting decision Advertising

• 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