20/2305

1. 31 Jul 2020

   Received by Brent

2. 4 Sep 2020

   Decision issued: Certificate of Lawfulness - Granted

3. 25 Jul 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

• 26/0613 Granted

  18 Mallard Way, London, NW9 8JH

  Proposed demolition of rear garage and erection of single storey rear extension, two storey side extension, 1x front rooflight, 1x side rooflight and removal of a chimney stack to the dwellinghouse.

  11 Mar 2026 65m away Householder
• 24/1946 Refused

  6 Mallard Way, London, NW9 8JH

  Demolition of conservatory and outbuilding and erection of a single and two storey side extension with conversion of garage into habitable space to dwellinghouse

  12 Jul 2024 65m away Householder
• 26/0917 Refused

  6 Mallard Way, London, NW9 8JH

  Proposed front porch, single-storey front infill extension and first-floor side to rear extension to dwellinghouse

  13 Apr 2026 65m away Householder
• 20/2961 Granted

  12 Sycamore Grove, London, NW9 8RB

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6m Maximum height - 2.9m Eaves height - 2.9m

  21 Sep 2020 72m away Prior approval
• 26/0234 Awaiting decision

  31 Sycamore Grove, London, NW9 8RB

  Proposed conversion of dwellinghouse into 2x self-contained flats, alterations to front, side and rear elevations, installation of 1x front rooflight, refuse storage to front and cycle storage to the rear, alteration to front, side and rear landscaping and subdivision of rear garden

  2 Feb 2026 72m away Full applications
• 22/3753 Refused

  31 Sycamore Grove, London, NW9 8RB

  Demolition of existing rear patio and proposed single storey rear extension, rear raised patio, loft conversion with rear dormer window, removal of chimney stack and 3x front rooflights to dwellinghouse.

  1 Nov 2022 72m away Householder

• 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
• 26/1353 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
• 26/1878 Awaiting decision

  75 North Circular Road, Stonebridge, London, NW10 0PJ

  Certificate of lawfulness for proposed single-storey rear extension to dwellinghouse.

  22 Jul 2026 Lawful development