63 Sefton Avenue London NW7 3QE

1. 16 Feb 2026

   Received by Barnet

2. 18 Feb 2026

   Validated

   Checked as complete and ready for consideration.

3. 10 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 15 April 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Barnet took a median of 42 days over the applications it decided in the last year.

This application is with Barnet for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

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

• 63 Sefton Avenue London NW7 3QE

  26/1690/PNH Submitted 6 May 2026 0m away

  57% historically approved · decision due ~1 Jul

  Single storey rear extension with a proposed maximum depth of 6.00 metres, maximum height of 4.00 metres and an eaves height of 2.40m

  Awaiting decision Prior approval Extension 10 docs
  Small domestic

• 63 Sefton Avenue London NW7 3QE

  26/1001/PNH Submitted 16 Mar 2026 6m away

  57% historically approved · decision due ~11 May

  Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 4.00 metres and eaves height of 2.70 metres

  Awaiting decision Prior approval Extension 11 docs
  Small domestic

• 63 Sefton Avenue London NW7 3QE

  26/0602/PNH Submitted 17 Feb 2026 7m away

  57% historically approved · decision due ~15 Apr

  Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.50 metres and eaves height of 3.00 metres

  Awaiting decision Prior approval Extension 9 docs
  Small domestic

• 63 Sefton Avenue London NW7 3QE

  26/2326/PNH Submitted 19 Jun 2026 50m away

  57% historically approved · decision due ~14 Aug

  Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 4.00 metres and eaves height of 2.50 metres.

  Awaiting decision Prior approval Extension 11 docs
  Small domestic

• 36 Delamere Gardens London NW7 3EB

  25/3683/HSE Submitted 8 Sep 2025 69m away

  77% historically approved · decision due ~3 Nov

  Single storey side/rear extension with 2no. rooflights

  Awaiting decision Householder Extension Loft or dormer 14 docs
  Small domestic

• 3 Delamere Gardens London NW7 3EA

  26/2813/HSE Submitted 30 Jul 2026 89m away

  77% historically approved · decision due ~24 Sep

  Single storey front extension incorporating a front porch, raising existing side extension floor level to match main house level, new roof with increased height to the side extension and 2no. rooflights, single storey rear extension with 4no. rooflights with new patio area, access steps to garden and hard and soft landscaping. Changes to fenestration: replacement of existing windows

  Awaiting decision Householder Extension Loft or dormer +2
  Small domestic

• 26/1907/191 Decided

  8 Golders Manor Drive London NW11 9HT

  Use of the property as a self-contained residential unit at ground floor level and the first and second floors as a 4-bedroom, 4-person House in Multiple Occupation (Sui Generis) (AMENDED DESCRIPTION)

  21 May 2026 Lawful development
• 26/2059/192 Decided

  Low Ridge Rowley Lane Barnet EN5 3HS

  Erection of a rear outbuilding

  3 Jun 2026 Lawful development
• 26/2066/192 Decided

  355 Hendon Way London NW4 3NB

  Roof extension involving rear dormer window and 3no. front facing rooflights. Removal of chimney on rear elevation (AMENDED DESCRIPTION)

  3 Jun 2026 Lawful development
• 26/1663/192 Decided

  152 Deans Lane Edgware HA8 9NT

  Change of use from single family dwellinghouse (Class C3a) to supported living accommodation Class C3b)

  5 May 2026 Lawful development
• 26/2025/192 Decided

  18 Hale Drive London NW7 3DU

  Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window

  1 Jun 2026 Lawful development