20/4289

1. 28 Dec 2020

   Received by Brent

2. 17 Feb 2021

   Decision issued: Certificate of Lawfulness - Refused

3. 2 Aug 2026

   Added to PlanIndex

The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.

Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.

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

• 26/1595 Awaiting decision

  134 Cairnfield Avenue, London, NW2 7PJ

  Demolition of rear extension and rear outbuilding; removal of two-storey rear bay window and gable projection. Proposed single-storey rear extension; conversion of garage to habitable space; hip-to-gable extension with side roof extension; rear dormer with Juliet balcony; single-storey rear outbuilding; alteration to fenestrations and front porch steps; alteration to boundary treatment and front landscaping

  24 Jun 2026 0m away Householder
• 20/4163 Granted

  4 Ashcombe Park, London, NW2 7QT

  Certificate of lawfulness for proposed loft conversion with rear dormer and installation of 3x rooflights, to dwellinghouse.

  16 Dec 2020 146m away Lawful development
• 20/3634 Granted

  10 Dollis Hill Lane, London, NW2 6JE

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 2.5m Maximum height - 3m Eaves height - 2.85m

  9 Nov 2020 152m away Prior approval
• 20/2659 Granted

  76 Tanfield Avenue, London, NW2 7RT

  Proposed removal of existing rear bay window and erection of single storey rear infill extension to ground floor flat

  27 Aug 2020 191m away Full applications
• 20/2952 Granted

  104 Tanfield Avenue, London, NW2 7RT

  Proposed single storey rear infill extension to ground floor flat.

  21 Sep 2020 191m away Full applications
• 20/3956 Refused

  104 Tanfield Avenue, London, NW2 7RT

  Conversion of ground floor flat into 2 self-contained flats and a single storey rear infill extension

  2 Dec 2020 191m away Full applications

• 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