Tresco House 65 Lisson Grove London NW1 6UH

1. 8 Jul 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 2 September 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's median decision took 66 days. More in our guide to how long planning decisions take.

The published feed does not state which type of application this is; the register entry on Westminster's portal will say. Our guide explains the common types.

• 91 Ashmill Street London NW1 6RA

  26/02874/NMA Submitted 30 Apr 2026 50 yards away

  93% historically approved · decision due ~25 Jun

  Amendments to planning permission dated 9th October 2024 (RN:24/04970/FULL) for Erection of rear extension to lower ground floor flat. Namely, correction to the roof plan layout to align with the approved site plan, including two rooflights and amendments to the green roof layout, with the inclusion of gravel for fire safety.

  Awaiting decision Amendments Extension Loft or dormer 7 docs

• 91 Ashmill Street London NW1 6RA

  26/02873/FULL Submitted 30 Apr 2026 50 yards away

  87% historically approved · decision due ~8 Jul

  Installation of a air conditioning unit and acoustic enclosure.

  Awaiting decision Full applications 15 docs

• 85 Ashmill Street London NW1 6RA

  26/02373/NMA Submitted 10 Apr 2026 50 yards away

  93% historically approved · decision due ~5 Jun

  Amendments to planning permission dated 15th August 2024 (RN:24/04547/FULL) for Alterations to front railings, new entrance gate and steps, including wheelchair stairlift to entrance to 85, new rear door to 85 and new rear ramp and patio. Namely, additional wall-fixed handrail to proposed stairs.

  Awaiting decision Amendments 7 docs

• 91 Ashmill Street London NW1 6RA

  26/04137/FULL Submitted 23 Jun 2026 50 yards away

  87% historically approved · decision due ~18 Aug

  Variation of condition 1 of planning permission dated 8th October 2024 (RN 24/04970/FULL) for the erection of rear extension to lower ground floor flat. NAMLEY, to change the design of the rear doors.

  Decided Full applications Extension

• Second Floor Flat 109 Bell Street London NW1 6TL

  25/09282/FULL Submitted 22 Dec 2025 50 yards away

  87% historically approved · decision due ~18 May

  Erection of additional storey to existing second floor flat, conversion of 1 flat into a 3-bed duplex with front elevation dormer windows set back from principal elevation.

  Awaiting decision Full applications Loft or dormer Windows or glazing 14 docs
  Domestic

• Stafford House Cosway Street London NW1 6TJ

  25/08726/FULL Submitted 1 Dec 2025 100 yards away

  Replacement of all single glazed timber windows with double-glazed timber sash and casement windows.

  Granted Full applications Windows or glazing 65 docs