20 Windermere Avenue, London, NW6 6LN

This site has had 2 applications since 2026: 1 approved, 0 refused.

• 26/1071 Granted

  20 Windermere Avenue, London, NW6 6LN

  Proposed demolition of rear conservatory, erection of single-storey side extension, single-storey rear extension, rear dormer extension, and installation of 2x rooflights to rear outrigger and 1x rear rooflight to dwellinghouse

  Decided 30 Jun 2026 Householder

1. 12 Oct 2026

   Received by Brent

2. 19 Oct 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 7 December 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Brent took a median of 56 days over the applications it decided in the last year.

This application is with Brent for determination, against a statutory target of eight weeks. Over the last year Brent's median decision took 56 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 Brent's portal will say. Our guide explains the common types.

• 6 Windermere Avenue, London, NW6 6LN

  22/0978 Submitted 15 Mar 2022 50 yards away

  Proposed single storey side infill and rear extensions to dwellinghouse

  Granted Householder Extension 6 docs
  Small domestic

• 32 Windermere Avenue, London, NW6 6LN

  21/2586 Submitted 7 Jul 2021 50 yards away

  Certificate of lawfulness for proposed single storey outbuilding/garden room at rear of dwellinghouse.

  Granted Lawful development 4 docs
  Small domestic

• 32 Windermere Avenue, London, NW6 6LN

  21/2585 Submitted 7 Jul 2021 50 yards away

  Non-material amendment (alterations to proposed fenestration to rear elevation) allowed under planning appeal ref: APP/T5150/D/20/3251302 dated 01/10/2020 of Householder reference 20/0556 for Proposed demolition of existing side extension and erection of a single storey side infill extension to dwellinghouse.

  Granted Amendments Extension Demolition +1 5 docs
  Small domestic

• 12 Windermere Avenue, London, NW6 6LN

  21/0564 Submitted 17 Feb 2021 50 yards away

  Certificate of lawfulness for existing single storey outbuilding to dwellinghouse

  Withdrawn Lawful development 2 docs
  Small domestic

• 16 Windermere Avenue, London, NW6 6LN

  25/2665 Submitted 18 Sep 2025 50 yards away

  Single storey rear infill extension, new front rooflight and alterations to openings.

  Granted Householder Extension Loft or dormer 8 docs
  Small domestic

• 12 Windermere Avenue, London, NW6 6LN

  21/1469 Submitted 21 Apr 2021 50 yards away

  Certificate of lawfulness for proposed erection of single storey rear outbuilding to dwellinghouse.

  Granted Lawful development 5 docs
  Small domestic