Second Floor 16 Conduit Street London W1S 2XL

This site has had 3 applications since 2026.

• 26/01480/NMA Awaiting decision

  Second Floor 16 Conduit Street London W1S 2XL

  Amendment of planning permission dated 7 June 2016 (RN: 15/06533/FULL) for 'Dual/alternative use of the second floor for either office (Class B1a) or residential (Class C3) use (1 x 2 bedroom unit). Installation of 4 x external grilles at second floor level on the Mill Street elevation and 1 x external grille on Conduit Street elevation'. NAMELY to vary the wording of Condition 6 to allow the implementation of an alternative ventilation strategy.

  Submitted 9 Mar 2026 Amendments
• 26/01173/CLOPUD Awaiting decision

  Second Floor 16 Conduit Street London W1S 2XL

  To confirm the lawfulness of proposed residential use on the second floor of the property, in line with planning permission (RN 15/06533/FULL)

  Submitted 24 Feb 2026 Lawful development

1. 4 Mar 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 29 April 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 66 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 91 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.

• Second Floor 16 Conduit Street London W1S 2XL

  26/01480/NMA Submitted 9 Mar 2026 50 yards away

  93% historically approved · decision due ~4 May

  Amendment of planning permission dated 7 June 2016 (RN: 15/06533/FULL) for 'Dual/alternative use of the second floor for either office (Class B1a) or residential (Class C3) use (1 x 2 bedroom unit). Installation of 4 x external grilles at second floor level on the Mill Street elevation and 1 x external grille on Conduit Street elevation'. NAMELY to vary the wording of Condition 6 to allow the implementation of an alternative ventilation strategy.

  Awaiting decision Amendments 5 docs

• Second Floor 16 Conduit Street London W1S 2XL

  26/01173/CLOPUD Submitted 24 Feb 2026 50 yards away

  86% historically approved · decision due ~21 Apr

  To confirm the lawfulness of proposed residential use on the second floor of the property, in line with planning permission (RN 15/06533/FULL)

  Awaiting decision Lawful development 9 docs

• 6 - 8 Mill Street London W1S 2AZ

  26/02839/ADFULL Submitted 29 Apr 2026 50 yards away

  87% historically approved · decision due ~24 Jun

  Detailed drawings of the fixed glazed awning and retractable awning pursuant to condition 3 of planning permission dated 17th March 2026 (RN: 25/06233/FULL).

  Awaiting decision Full applications Windows or glazing 3 docs

• Sofia House 19 Conduit Street London W1S 2BH

  26/05695/ADFULL Submitted 19 Aug 2026 50 yards away

  89% historically approved · decision due ~14 Oct

  Details of the pre-demolition audit in accordance with section 4.6 of the GLA's adopted Circular Economy; pursuant to condition 12 of Planning Permission dated 31 July 2026 (26/02841/FULL)

  Awaiting decision Demolition

• Sofia House 19 Conduit Street London W1S 2BH

  26/02841/FULL Submitted 29 Apr 2026 50 yards away

  87% historically approved · decision due ~24 Jun

  Erection of five storey rear extension including extension of lower ground floor, roof level alterations, including new dormers and extension to rear, installation of plant and alterations associated with refurbishment of building

  Awaiting decision Full applications Extension Loft or dormer 55 docs

• 4 Mill Street London W1S 2AX

  25/05998/FULL Submitted 22 Aug 2025 50 yards away

  Erection of a rear roof extension at third floor level with a sedum roof to the rear; replacement of windows at second floor level with double glazing timber windows; replacement of door and window to the existing rear first floor extension with double glazing timber windows including replacement of roofing; and associated works all in connection with the use of the first to third floor as four flats (Class C3)

  Granted Full applications New dwelling Extension +1 29 docs
  Several homes

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront with Medication Dispensing Outlet.

  Received 15 Sep, published by the council 17 Sep 2026 Full applications
• 26/06297/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.

  Received 15 Sep, published by the council 17 Sep 2026 Full applications
• 26/06294/FULL Awaiting decision

  15 Eaton Mews South London SW1W 9HP

  Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

  Received 15 Sep, published by the council 22 Sep 2026 Full applications
• 26/06317/FULL Awaiting decision

  124 Hamilton Terrace London NW8 9UT

  Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

  Received 15 Sep, published by the council 22 Sep 2026 Full applications
• 26/06273/FULL Awaiting decision

  9A Grosvenor Square London W1K 5AE

  Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

  Received 14 Sep, published by the council 22 Sep 2026 Full applications