63 Sefton Avenue London NW7 3QE

This site has had 5 applications since 2026: 1 approved, 3 refused.

• 26/1690/PNH Refused

  63 Sefton Avenue London NW7 3QE

  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

  Decided 10 Jun 2026 Prior approval
• 26/1001/PNH Refused

  63 Sefton Avenue London NW7 3QE

  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

  Decided 20 Apr 2026 Prior approval
• 26/0602/PNH Refused

  63 Sefton Avenue London NW7 3QE

  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

  Decided 31 Mar 2026 Prior approval
• 26/0597/192 Granted

  63 Sefton Avenue London NW7 3QE

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

  Decided 2 Mar 2026 Lawful development

1. 19 Jun 2026

   Received by Barnet

2. 25 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 14 August 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 45 days over the applications it decided in the last year.

This application is with Barnet for determination, against a statutory target of eight weeks. Over the last year Barnet decided prior approval applications in a median of 36 days. More in our guide to how long planning decisions take.

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

• 63 Sefton Avenue London NW7 3QE

  26/1690/PNH Submitted 6 May 2026 50 yards away

  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

  Refused Prior approval Extension 12 docs
  Small domestic

• 63 Sefton Avenue London NW7 3QE

  26/0597/192 Submitted 16 Feb 2026 50 yards away

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

  Granted Lawful development Extension Loft or dormer +1 11 docs

• 63 Sefton Avenue London NW7 3QE

  26/0602/PNH Submitted 17 Feb 2026 50 yards away

  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

  Refused Prior approval Extension 13 docs
  Small domestic

• 63 Sefton Avenue London NW7 3QE

  26/1001/PNH Submitted 16 Mar 2026 50 yards away

  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

  Refused Prior approval Extension 14 docs
  Small domestic

• 16 Sefton Avenue London NW7 3QD

  26/3511/PNH Submitted 28 Sep 2026 50 yards away

  56% historically approved · decision due ~23 Nov

  Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.20 metres and eaves height of 3.00 metres.

  Awaiting decision Prior approval Extension
  Small domestic

• 31 Sefton Avenue London NW7 3QB

  25/5113/NMA Submitted 19 Dec 2025 100 yards away

  Non material amendment to planning permission 25/3239/HSE dated 01/10/2025 for 'First floor side extension. Roof extension involving hip to gable, rear dormer with glass balustrade for the juliette balcony and 3no. front facing rooflights. Changes to roof tiles and fenestration' Amendments includes removal of existing chimney and adjustment to front facing rooflights

  Granted Amendments Extension Loft or dormer +2 9 docs

• 26/3970/PNH Awaiting decision

  103 Arlington Road London N14 5BA

  2no. single storey rear extensions with a depth of 6.00 metrres, a maximum height of 4.00 metres and an eaves height of 3.00 metres and a depth of 6.00 metres, and eaves height of 4.00 metres and an eaves height of 3.00 metres.

  3 Nov 2026 Prior approval
• 26/3937/PNH Awaiting decision

  85 Cotswold Gardens London NW2 1PE

  Single storey rear extension with a proposed depth of 5.00 metres, maximum height of 3.00 metres and eaves height of 3.00 metres.

  29 Oct 2026 Prior approval
• 26/3927/PNH Awaiting decision

  56 Brookfield Crescent London NW7 2DG

  Single Storey Rear Extension with a depth of 6.00 metres, a maximum height of 3.53 metres and an eaves height of 3.00 metres

  Received 28 Oct, published by the council 29 Oct 2026 Prior approval
• 26/3923/PNH Awaiting decision

  31 Woodlands London NW11 9QJ

  2no. Single storey rear extensions with a proposed depth of 6.00 metres, maximum height of 4.00 metres and eaves height of 3.00 metres. Following demolition of the existing rear extension and patio.

  Received 28 Oct, published by the council 29 Oct 2026 Prior approval
• 26/3877/PNH Awaiting decision

  90 Cumbrian Gardens London NW2 1EL

  Single storey rear extension with a proposed depth of 6.00 metres, a maximum height of 3.00 metres and an eaves height of 3.00 metres, following demolition of the existing conservatory

  26 Oct 2026 Prior approval