37 Waltham Avenue, London, NW9 9SH

1. 23 Jun 2026

   Received by Brent

2. 1 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 25 Jul 2026

   Added to PlanIndex

4. 26 Aug 2026

   Decision issued: Permission Granted

5. 30 Aug 2026

   Status changed to Decided

   Previously Registered.

Brent granted permission on 26 August 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 3 Waltham Avenue, London, NW9 9SH

  21/3295 Submitted 27 Aug 2021 50 yards away

  Certificate of lawfulness for proposed hip to gable loft conversion with rear dormer window, juliet balcony, 3 front rooflights and erection of single storey outbuilding at rear of dwellinghouse.

  Refused Lawful development Loft or dormer Windows or glazing 9 docs
  Small domestic

• 3 Waltham Avenue, London, NW9 9SH

  21/3294 Submitted 27 Aug 2021 50 yards away

  Proposed single storey side to rear extension to dwellinghouse.

  Refused Householder Extension 8 docs
  Small domestic

• 29 Waltham Avenue, London, NW9 9SH

  25/3228 Submitted 18 Nov 2025 50 yards away

  Proposed single storey outbuilding to the rear garden of the dwellinghouse.

  Granted Householder 7 docs
  Small domestic

• 9 Waltham Avenue, London, NW9 9SH

  25/2493 Submitted 1 Sep 2025 50 yards away

  Certificate of lawfulness for proposed single storey rear extension and conversion of side garage into a habitable room with raised roof height and replacement of garage door with window to the front elevation of the dwellinghouse.

  Refused Lawful development Extension Windows or glazing 9 docs
  Small domestic

• 31 Waltham Avenue, London, NW9 9SH

  21/4403 Submitted 1 Dec 2021 50 yards away

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6m Maximum height - 3245m Eaves height - 2995m

  Refused Prior approval Extension 5 docs
  Small domestic

• 9 Waltham Avenue, London, NW9 9SH

  26/0193 Submitted 27 Jan 2026 50 yards away

  Proposed single storey rear extension, conversion of garage into habitable room with replacement of garage door with window to front elevation and alterations to garage roof, hip to gable extension, rear dormer window with 2x front rooflights, installation of a new side window and installation of window to the side roof slope to the dwellinghouse.

  Granted Householder Extension Loft or dormer +1 13 docs
  Small domestic