21 Fairfields Close, London, NW9 0PH

1. 31 Dec 2025

   Received by Brent

2. 13 Jan 2026

   Validated

   Checked as complete and ready for consideration.

3. 5 Mar 2026

   Decision issued: Certificate of Lawfulness - Granted

4. 10 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 21 Fairfields Close, London, NW9 0PH

  26/0071 Submitted 13 Jan 2026 0m away

  Certificate of lawfulness for proposed demolition of greenhouse and erection of outbuilding in the rear garden of the dwellinghouse.

  Granted Lawful development Demolition 1 doc
  Small domestic

• 21 Fairfields Close, London, NW9 0PH

  26/0338 Submitted 12 Feb 2026 0m away

  Certificate of lawfulness for proposed hip to gable roof-end, rear dromer extension and 3x front rooflights to dwellinghouse.

  Granted Lawful development Extension Loft or dormer 18 docs
  Domestic

• 21 Fairfields Close, London, NW9 0PH

  25/3096 Submitted 3 Nov 2025 0m 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 - 2.98m Eaves height - 2.98m

  Granted Prior approval Extension 13 docs
  Small domestic

• 10 Fairfields Close, London, NW9 0PH

  26/1371 Submitted 1 Jun 2026 2m away

  79% historically approved · decision due ~3 Aug

  Certificate of lawfulness for proposed change of use from single dwelling house (Class 3a) to a d...

  Decided
  Domestic

• 10 Fairfields Close, London, NW9 0PH

  26/2091 Submitted 17 Aug 2026 2m away

  79% historically approved · decision due ~28 Oct

  Certificate of lawfulness for existing use of the property as a dwelling providing supported acco...

  Awaiting decision
  Domestic

• 21 Fairfields Close, London, NW9 0PH

  26/1916 Submitted 28 Jul 2026 2m away

  79% historically approved · decision due ~1 Oct

  Proposed conversion of single dwelling into 2 x self-contained flats, replacement of 1x window wi...

  Awaiting decision New dwelling Windows or glazing
  Domestic

• 26/0783 Granted

  3 Hamilton Road, London, NW10 1NU

  Certificate of lawfulness for existing single-storey rear extension to dwellinghouse

  26 Mar 2026 Lawful development
• 26/1946 Awaiting decision

  120 Gladstone Park Gardens, London, NW2 6RL

  Certificate of lawfulness for proposed rear dormer extension with Juliet balcony, hip to gable roof extension, installation of 1x window to side elevation and 2x front rooflights to dwellinghouse.

  30 Jul 2026 Lawful development
• 26/1208 Granted

  50 Ballogie Avenue, London, NW10 1TA

  Certificate of lawfulness for proposed rear dormer extension, hip to gable roof extension, alteration to fenestration and installation of rooflights to the dwellinghouse

  13 May 2026 Lawful development
• 26/1015 Refused

  5 Midholm, Wembley, HA9 9LJ

  Certificate of lawfulness for proposed installation of solar panels to the side and rear roofslope of the dwellinghouse.

  23 Apr 2026 Lawful development
• 26/1176 Refused

  47 Barn Rise, Wembley, HA9 9NH

  Certificate of lawfulness for proposed single storey outbuilding in rear garden of the dwellinghouse.

  11 May 2026 Lawful development