11 Thyra Grove London N12 8HB

1. 22 Dec 2025

   Received by Barnet

2. 10 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 16 February 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 43 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

• 11 Thyra Grove London N12 8HB

  26/2208/PNH Submitted 15 Jun 2026 0m away

  2No. single storey rear extensions with a proposed depth of 6.00m, maximum height of 3.98m and eaves height of 2.98m following the demolition of the existing conservatory.

  Granted Prior approval Extension Demolition 9 docs
  Small domestic

• 8 Thyra Grove London N12 8HB

  26/2358/PNH Submitted 22 Jun 2026 23m away

  58% historically approved · decision due ~18 Aug

  Single storey rear extension with a maximum proposed depth of 4.9m, a maximum height of 3.42m and an eaves height of 2.93m

  Decided Prior approval Extension
  Small domestic

• 8 Thyra Grove London N12 8HB

  26/2357/PNH Submitted 22 Jun 2026 23m away

  58% historically approved · decision due ~18 Aug

  Single storey rear extension with a maximum proposed depth of 6.0m, a maximum height of 3.42m and an eaves height of 2.93m.

  Decided Prior approval Extension
  Small domestic

• 8 Thyra Grove London N12 8HB

  26/0926/192 Submitted 11 Mar 2026 38m away

  79% historically approved · decision due ~6 May

  Roof extension involving hip to gable, rear dormer window and 3no. front facing rooflights

  Awaiting decision Lawful development Extension Loft or dormer +1 4 docs

• 8 Thyra Grove London N12 8HB

  26/1850/PNH Submitted 18 May 2026 38m away

  Single storey rear extension following demolition of existing rear extension at a proposed depth of 6.0m from outrigger and 6.0m from the original rear wall, a maximum height of 3.42m and an eaves height of 2.93m

  Withdrawn Prior approval Extension Demolition 11 docs
  Small domestic

• 16 Alexandra Grove London N12 8NU

  25/3694/192 Submitted 8 Sep 2025 73m away

  79% historically approved · decision due ~7 Nov

  Conversion of existing garage into habitable room, insertion of windows and door to replace garage door

  Awaiting decision Lawful development Windows or glazing 5 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