16 Portman Gardens London NW9 5AS

1. 11 Sep 2026

   Received by Barnet

2. 14 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 14 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 9 November 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 householder applications in a median of 56 days. More in our guide to how long planning decisions take.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 15 Portman Gardens London NW9 5AS

  26/2406/192 Submitted 24 Jun 2026 50 yards away

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

  Refused Lawful development Extension Loft or dormer +1 10 docs

• 61 The Greenway London NW9 5AU

  26/3699/HSE Submitted 13 Oct 2026 100 yards away

  77% historically approved · decision due ~8 Dec

  Conversion of the existing garage into habitable room, insertion of window to replace garage door

  Awaiting decision Householder Windows or glazing
  Domestic

• 1 Greenway Close London NW9 5AZ

  26/3676/HSE Submitted 12 Oct 2026 100 yards away

  77% historically approved · decision due ~7 Dec

  Single storey side and rear extension with 1no. skylight following demolition of the existing garage. New front porch

  Awaiting decision Householder Extension Demolition
  Small domestic

• 1 Greenway Close London NW9 5AZ

  26/1139/HSE Submitted 25 Mar 2026 100 yards away

  Two storey side extension following the demolition of existing garage. Roof extension involving hip to gable to main roof. Single storey rear extension with 1no. rooflight, new decking and patio area. New front porch

  Refused Householder Extension Loft or dormer +1 10 docs
  Small domestic

• 1 Greenway Close London NW9 5AZ

  26/1141/192 Submitted 25 Mar 2026 100 yards away

  Roof extension involving hip to gable, rear dormer window with juliette balcony and 2no. front facing rooflights

  Granted Lawful development Extension Loft or dormer +1 9 docs

• 49 The Greenway London NW9 5AU

  25/4615/FUL Submitted 19 Nov 2025 100 yards away

  63% historically approved · decision due ~14 Jan

  Change of use from a single dwellinghouse (Use Class C3) to a 5 bed HMO (House in Multiple Occupation (Use Class C4) for 5 people including single storey rear extension

  Awaiting decision Full applications Extension 8 docs
  Small domestic

• 26/3953/HSE Awaiting decision

  51 Bedford Avenue Barnet EN5 2ER

  Single storey rear extension with flat roof, 1no. rooflight and new access steps following demolition of the existing conservatory. Removal of the rear chimney stack. Changes to ground floor north side fenestration

  2 Nov 2026 Householder
• 26/3947/HSE Awaiting decision

  20 Fallow Court Avenue London N12 0EB

  Single storey side and rear extension

  30 Oct 2026 Householder
• 26/3946/HSE Awaiting decision

  21 Selvage Lane London NW7 3SS

  Single storey front porch extension with pitched roof

  Received 30 Oct, published by the council 3 Nov 2026 Householder
• 26/3950/HSE Awaiting decision

  113 Walmington Fold London N12 7LH

  Single storey rear extension with pitched gable roof. New Pergola. Installation of Air Source Heat Pump (ASHP)

  Received 30 Oct, published by the council 2 Nov 2026 Householder
• 26/3941/HSE Awaiting decision

  29 Flower Lane London NW7 2JG

  Part single, part two storey rear extension with enlargement of the patio area following demolition of the conservatory

  Received 29 Oct, published by the council 2 Nov 2026 Householder