9 Rosslyn Crescent, Wembley, HA9 7NZ

1. 17 Feb 2026

   Received by Brent

2. 14 Apr 2026

   Decision issued: Certificate of Lawfulness - Refused

3. 10 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

• 6 Rosslyn Crescent, Wembley, HA9 7NZ

  21/0391 Submitted 4 Feb 2021 0m away

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

  Granted Lawful development Extension Loft or dormer 4 docs
  Domestic

• 6 Rosslyn Crescent, Wembley, HA9 7NZ

  21/1236 Submitted 6 Apr 2021 0m away

  Single storey rear extension with flat roof over existing rear extension of dwellinghouse.

  Granted Householder Extension 4 docs
  Small domestic

• 2 Rosslyn Crescent, Wembley, HA9 7NZ

  25/2718 Submitted 24 Sep 2025 0m away

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

  Granted Lawful development Extension 9 docs
  Small domestic

• 21 Lambert Walk, Wembley, HA9 7TR

  20/2374 Submitted 4 Aug 2020 109m away

  Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 4m Maximum height - 3m Eaves height - 2.9m

  Granted Prior approval Extension 4 docs
  Small domestic

• 21 Lambert Walk, Wembley, HA9 7TR

  20/2347 Submitted 4 Aug 2020 109m away

  Certificate of lawfulness for proposed demolition of rear extension and erection of a new single storey rear extension to dwellinghouse

  Granted Lawful development Extension Demolition 5 docs
  Small domestic

• 11 Castleton Avenue, Wembley, HA9 7QH

  20/3015 Submitted 24 Sep 2020 124m away

  Conversion of existing garage into a habitable room, erection of single storey side to rear extension to dwellinghouse.

  Refused Householder Extension 6 docs
  Small 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