20/4188

1. 17 Dec 2020

   Received by Brent

2. 29 Dec 2020

   Validated

   Checked as complete and ready for consideration.

3. 23 Feb 2021

   Decision issued: Certificate of Lawfulness - Refused

4. 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

• 26/1489 Awaiting decision

  85 Preston Hill, Harrow, HA3 9SQ

  Proposed single-storey rear extension to dwellinghouse

  11 Jun 2026 59m away Householder
• 20/3078 Refused

  4 The Garth, Harrow, HA3 9TQ

  Proposed erection of part two storey part single storey side extension, single storey rear extension, single storey front extension and new front porch with double entrance doors, loft conversion with rear dormer and juliet balcony, replacement fenestration at first floor level to the rear to include juliet balcony to dwellinghouse

  28 Sep 2020 74m away Householder
• 26/1212 Awaiting decision

  90 Preston Hill, Harrow, HA3 9SG

  Conversion of existing unauthorised HMO into single family dwellinghouse with, retention of single storey rear and side extension, retention of hip to gable and rear dormer extensions, relocation of first floor side heat source pump, cycle and refuse storages spaces, landscaping and installation of boundary wall to the front forecourt.

  13 May 2026 106m away Full applications
• 21/0080 Granted

  148 The Mall, Harrow, HA3 9TH

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

  8 Jan 2021 152m away Lawful development
• 21/0438 Refused

  150 The Mall, Harrow, HA3 9TH

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6m Maximum height - 3m Eaves height - 2.75m

  7 Feb 2021 152m away Prior approval
• 20/3949 Granted

  148 The Mall, Harrow, HA3 9TH

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6m Maximum height - 3.2m Eaves height - 2.99m

  1 Dec 2020 152m 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