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
• 26/01398/ADFULL Awaiting decision

  Second Floor 16 Conduit Street London W1S 2XL

  Details of waste storage arrangements pursuant to Condition 5 of the planning permission dated 7 June 2016 (RN: 15/06533/FULL)

  Submitted 4 Mar 2026 Full applications

1. 24 Feb 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 21 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 lawful development applications in a median of 78 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• Second Floor 16 Conduit Street London W1S 2XL

  26/01398/ADFULL Submitted 4 Mar 2026 50 yards away

  87% historically approved · decision due ~29 Apr

  Details of waste storage arrangements pursuant to Condition 5 of the planning permission dated 7 June 2016 (RN: 15/06533/FULL)

  Awaiting decision Full applications 4 docs

• 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

• 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

• 26/06158/CLOPUD Awaiting decision

  2 Hamilton Gardens London NW8 9PT

  Erection of replacement, enlarged single storey ground floor rear extension.

  Received 9 Sep, published by the council 15 Sep 2026 Lawful development
• 26/06080/CLEUD Awaiting decision

  91 Gloucester Place London W1U 6JG

  Certificate of lawfulness for an existing use or development to confirm that the development authorised by full planning permission ref. 22/08385/FULL & listed building consent (RN 22/08386/LBC) has lawfully commenced as a result of the works evidenced.

  Received 7 Sep, published by the council 14 Sep 2026 Lawful development
• 26/06044/CLOPUD Awaiting decision

  9 Abinger Mews W9 3SP

  Proposed loft conversion with rear dormer and 3 front rooflights to existing mid-terraced house.

  Received 3 Sep, published by the council 11 Sep 2026 Lawful development
• 26/06035/CLOPUD Awaiting decision

  30 Ashworth Road W9 1JY

  Erection of new garden retaining wall and erection of new garden timber fence to match the height of existing fence.

  Received 3 Sep, published by the council 11 Sep 2026 Lawful development
• 26/05871/CLEUD Awaiting decision

  32 Cambridge Street London SW1V 4QH

  Confirmation of the lawful implementation of planning permission dated 13 August 2021 (RN: 21/04143/FULL) has commenced before the expiry of the three year time period and may, therefore, lawfully be carried out and completed.

  Received 27 Aug, published by the council 4 Sep 2026 Lawful development