11 Tretawn Park London NW7 4PS

1. 15 Jun 2026

   Received by Barnet

2. 22 Jun 2026

   Validated

   Checked as complete and ready for consideration.

3. 20 Jul 2026

   Decision issued: Unlawful

4. 16 Aug 2026

   Added to PlanIndex

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within three years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

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

• 11 Tretawn Park London NW7 4PS

  26/1773/NMA Submitted 12 May 2026 2m away

  70% historically approved · decision due ~7 Jul

  Non material amendment to planning permission 22/5054/HSE dated 09/02/2023 for 'Ground floor rear extension. New pitched roof including extensions at roof level to side and front, new roof finishes and 2no side facing rooflights. New front and side balconies with associated railings. Alterations of existing window and door openings. Change to external wall finish. Alteration to existing front vehicular access and front hardstanding. Changes to boundary treatment. Installation of flue' Amendments include minor revisions to windows and doors

  Awaiting decision Amendments Extension Loft or dormer +2 5 docs

• 11 Tretawn Park London NW7 4PS

  26/2758/RCU Submitted 24 Jul 2026 17m away

  79% historically approved · decision due ~2 Oct

  Single storey side extension with 2no. additional rooflights (Retrospective application)

  Awaiting decision Extension Loft or dormer
  Small domestic

• 15 Tretawn Park London NW7 4PS

  TPP/0423/26 Submitted 20 Jul 2026 17m away

  79% historically approved · decision due ~14 Sep

  1 x Yew (applicants ref. T1) - Fell. Standing in Group G2 of Tree Preservation Order. (Exempt 5 day notice)

  Awaiting decision Trees

• 1 Tretawn Park London NW7 4PS

  25/5166/HSE Submitted 24 Dec 2025 90m away

  77% historically approved · decision due ~4 Mar

  Two storey front extension and part single, part two storey side and rear extension with first floor juliette balcony to front elevation and first floor balconies to front and rear elevations, following demolition of existing garage and conservatory. Associated alterations to roof including increase in ridge height

  Awaiting decision Householder Extension Roofing +1 11 docs
  Small domestic

• 1 Tretawn Park London NW7 4PS

  25/3952/HSE Submitted 29 Sep 2025 90m away

  77% historically approved · decision due ~28 Nov

  Two storey front extension and part single, part two storey side and rear extension with first floor balconies to front and rear elevations, following demolition of existing garage and conservatory. Associated alterations to roof including increase in ridge height

  Awaiting decision Householder Extension Roofing +1 14 docs
  Small domestic

• 60 Lawrence Avenue London NW7 4NN

  26/0743/192 Submitted 26 Feb 2026 111m away

  79% historically approved · decision due ~23 Apr

  Roof extension with rear dormer windows, 2no. front facing rooflights and new side gable window

  Awaiting decision Lawful development Extension Loft or dormer +1 3 docs

• 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