23 - 25 Chiltern Street London W1U 7PH

1. 9 Oct 2026

   Received by Westminster

2. 13 Oct 2026

   Validated

   Checked as complete and ready for consideration.

3. 16 Oct 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 8 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.

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.

• 27 Chiltern Street London W1U 7PJ

  26/07070/FULL Submitted 15 Oct 2026 50 yards away

  88% historically approved · decision due ~10 Dec

  Installation of three external air-conditioning condenser units within the two existing rear courtyards/lightwells at ground-floor level. Two condenser units will be located within the left-hand courtyard and enclosed within a purpose-built acoustic enclosure, while one condenser unit will be located within the right-hand courtyard and screened by a multi-panel acoustic screen. The proposed acoustic mitigation measures are intended to minimise operational noise and reduce the impact on neighbouring residential properties. The installation will include the necessary associated works to support the operation of the condenser units. No change of use is proposed as part of this application.

  Awaiting decision Full applications

• Ground Floor 32 Chiltern Street London W1U 7QQ

  26/00867/ADV Submitted 12 Feb 2026 50 yards away

  82% historically approved · decision due ~9 Apr

  Display of three vinyls to ground floor windows measuring 2.41m x 1.75m, 1.42m x 0.6m and 0.34m x 0.6m for a temporary period of one year

  Awaiting decision Advertising Windows or glazing 4 docs

• 44 Chiltern Street London W1U 7QP

  25/06012/ADV Submitted 22 Aug 2025 50 yards away

  Display of three vinyls on the external ground floor windows for a temporary period of one year from 01 September 2025 until 31 August 2026.

  Granted Advertising Windows or glazing 11 docs

• 44 Chiltern Street London W1U 7QP

  26/02432/FULL Submitted 14 Apr 2026 50 yards away

  88% historically approved · decision due ~9 Jun

  Installation of two external air conditioning condenser units positioned at ground floor level, on top of the existing light well roof.

  Awaiting decision Full applications 14 docs

• 29 Chiltern Street London W1U 7PL

  25/08821/FULL Submitted 4 Dec 2025 50 yards away

  Installation of external plant within the rear lightwell.

  Granted Full applications 22 docs

• 40 - 42 Chiltern Street London W1U 7QN

  25/06933/FULL Submitted 26 Sep 2025 50 yards away

  Installation of two wall mounted electric heaters, four wall lamps and two awnings.

  Refused Full applications 22 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