20/4163

1. 16 Dec 2020

   Received by Brent

2. 7 Jan 2021

   Validated

   Checked as complete and ready for consideration.

3. 3 Mar 2021

   Decision issued: Certificate of Lawfulness - Granted

4. 2 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

• 26/1634 Awaiting decision

  107 Cairnfield Avenue, London, NW2 7PH

  Proposed rear dormer extension, hip to gable roof extension and installation of 2x front rooflights to existing HMO.

  29 Jun 2026 58m away Full applications
• 26/1110 Awaiting decision

  55 Cairnfield Avenue, London, NW2 7PH

  Change of use from single dwellinghouse to 5-bed 5-person House in Multiple Occupation (HMO), to include bin and cycle storage to front forecourt.

  1 May 2026 58m away Full applications
• 26/0626 Refused

  44 Cairnfield Avenue, London, NW2 7PE

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 5.8m Maximum height - 3m Eaves height - 2.8m

  12 Mar 2026 100m away Prior approval
• 26/1815 Awaiting decision

  22 Cairnfield Avenue, London, NW2 7PE

  Certificate of lawfulness for existing use as 5 bedroom 5 person house in multiple occupation (HMO)

  15 Jul 2026 100m away Lawful development
• 26/1145 Refused

  22 Cairnfield Avenue, London, NW2 7PE

  Certificate of lawfulness for existing use of dwellinghouse as 5x bedroom 5x person HMO

  7 May 2026 100m away Lawful development
• 26/0776 Granted

  44 Cairnfield Avenue, London, NW2 7PE

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 4.8m Maximum height - 3m Eaves height - 3m

  24 Mar 2026 100m away Prior approval

• 26/1465 Granted

  8 Roe Green, London, NW9 0NY

  Certificate of lawfulness for proposed hip to gable extension and rear dormer window with 3x front rooflights to the dwellinghouse.

  10 Jun 2026 Lawful development
• 26/1370 Granted

  45 Holmstall Avenue, Edgware, HA8 5JQ

  Certificate of lawfulness for proposed use of dwellinghouse as a childrens' residential home

  1 Jun 2026 Lawful development
• 26/1260 Granted

  18 Hartland Road, London, NW6 6BJ

  Certificate of lawfulness for proposed air source heat pump to rear of dwellinghouse

  18 May 2026 Lawful development
• 26/1901 Awaiting decision

  176 Bridgewater Road, Wembley, HA0 1AR

  Certificate of lawfulness for proposed single-storey rear extension, rear dromer extension and 2x front rooflights to dwellinghouse.

  26 Jul 2026 Lawful development
• 26/1353 Granted

  4 Hardinge Road, London, NW10 3PJ

  Certificate of lawfulness for proposed conversion of existing garage into a habitable room with replacement of garage door with window to side elevation and removal of ground floor side window of the dwellinghouse

  29 May 2026 Lawful development