8 Allandale Avenue London N3 3PJ

1. 18 Feb 2026

   Received by Barnet

2. 19 Feb 2026

   Validated

   Checked as complete and ready for consideration.

3. 10 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 16 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.

Prior approval applications arise where permitted development rights already grant the principle of the work, such as larger home extensions, changes of use to housing or agricultural buildings. The council may only consider the specific matters set out in the rules, for example transport, flooding or appearance, and in many classes the work may proceed if the council does not respond within the deadline, commonly 56 days.

More on prior approval applications in our guide

• 8 Allandale Avenue London N3 3PJ

  26/2165/HSE Submitted 10 Jun 2026 0m away

  Single storey rear extension and pergola. Alterations to the existing terrace area. Changes to rear fenestration

  Refused Householder Extension Windows or glazing 8 docs
  Small domestic

• Highview Chessington Avenue London N3 3DP

  26/2872/HSE Submitted 4 Aug 2026 65m away

  77% historically approved · decision due ~29 Sep

  Lower ground floor rear extension to create a terrace to link main house accommodation to garden with rear external access steps and associated rear lightwells. Roof extension involving hip to gable with new mansard roof, with 4no. front facing, 3no rear facing rooflights

  Awaiting decision Householder Extension Loft or dormer
  Domestic

• 28 Chessington Avenue London N3 3DP

  26/0184/HSE Submitted 19 Jan 2026 109m away

  77% historically approved · decision due ~16 Mar

  Part single part two-storey rear extension, following removal of the existing shed. Raising of existing lower flat roof to create large crown roof. Roof extension involving side and rear dormer window and 2no. front and 3no. side facing rooflights (AMENDED DESCRIPTION)

  Awaiting decision Householder Extension Loft or dormer +1 4 docs
  Small domestic

• 30 Fairholme Gardens London N3 3EB

  25/5190/HSE Submitted 29 Dec 2025 203m away

  77% historically approved · decision due ~23 Feb

  Single storey rear extension with 2no. rooflights. Conversion of the existing garage into habitable room, insertion of window to replace the existing garage door

  Awaiting decision Householder Extension Loft or dormer +1 8 docs
  Small domestic

• 30 Fairholme Gardens London N3 3EB

  26/1221/HSE Submitted 31 Mar 2026 203m away

  77% historically approved · decision due ~28 May

  First floor rear extension. Changes to fenestration

  Awaiting decision Householder Extension Windows or glazing 6 docs
  Domestic

• 72-74 Regents Park Road London N3 3JH

  25/3686/S73 Submitted 8 Sep 2025 218m away

  95% historically approved · decision due ~14 Nov

  Variation of condition 1 (Approved Plans) of planning permission reference 23/4042/FUL dated 30/01/24 for 'Demolition of the existing property and erection of a part three, part four storey building plus basement comprising of nine self-contained flats with car and cycle parking at basement level, refuse/recycling storage, plant room, associated amenity space and landscaping.' Variation to include: Use of ground floor flat roof as terrace for first floor flat; Provision of 1500mm deep cantilevered balcony at second floor level with 1800mm high privacy screen; Use of second floor flat roof as a terrace at third floor level with 1700mm high privacy screen

  Awaiting decision Conditions New dwelling Demolition 16 docs

• 26/3224/PNH Awaiting decision

  Low Ridge Rowley Lane Barnet EN5 3HS

  Single storey rear extension with a proposed depth of 8.00 metres, maximum height of 3.00 metres and eaves height of 3.00 metres.

  3 Sep 2026 Prior approval
• 26/3218/PNH Awaiting decision

  22 Highcroft Gardens London NW11 0LX

  2no. Single storey rear extensions with a proposed depth of 6.00 metres, maximum height of 3.00 metres and eaves height of 3.00 metres, and depth of 3.05 metres, maximum height of 3.00 metres and eaves height of 3.00 metres respectively, following demolition of existing roofed patio.

  2 Sep 2026 Prior approval
• 26/3212/PNH Awaiting decision

  10 Richmond Road Barnet EN5 1SB

  Single storey rear extension with a proposed depth of 5.54 metres, maximum height of 3.50 metres and eaves height of 3.00 metres.

  2 Sep 2026 Prior approval
• 26/3183/PNH Awaiting decision

  34 Selvage Lane London NW7 3SP

  Single storey rear extension with a proposed depth of 3.80 metres, maximum height of 3.00 metres and eaves height of 2.75 metres, following partial demolition of existing side manifestation.

  1 Sep 2026 Prior approval
• 26/3194/PNH Awaiting decision

  74 Windsor Drive Barnet EN4 8UD

  Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.00 metres and eaves height of 2.60 metres, following demolition of the existing rear extension.

  31 Aug 2026 Prior approval