1 Tretawn Park London NW7 4PS

This site has had 2 applications since 2025.

• 25/5166/HSE Awaiting decision

  1 Tretawn Park London NW7 4PS

  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

  Submitted 24 Dec 2025 Householder

1. 29 Sep 2025

   Received by Barnet

2. 3 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 10 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 28 November 2025, 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 46 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.

• 1 Tretawn Park London NW7 4PS

  25/5166/HSE Submitted 24 Dec 2025 50 yards 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

• 11 Tretawn Park London NW7 4PS

  26/2758/RCU Submitted 24 Jul 2026 100 yards away

  79% historically approved · decision due ~2 Oct

  Single storey side extension. 2no. additional rooflights to main roof. (Retrospective Application) (AMENDED PLANS AND DESCRIPTION)

  Decided Extension Loft or dormer
  Small domestic

• 15 Tretawn Park London NW7 4PS

  TPP/0423/26 Submitted 20 Jul 2026 100 yards 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

• 11 Tretawn Park London NW7 4PS

  26/2213/192 Submitted 15 Jun 2026 100 yards away

  Single storey side extension with 2no. additional rooflights [Amended Description]

  Refused Lawful development Extension Loft or dormer 20 docs
  Small domestic

• 11 Tretawn Park London NW7 4PS

  26/1773/NMA Submitted 12 May 2026 100 yards away

  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

  Granted Amendments Extension Loft or dormer +2 8 docs

• 59 Uphill Road London NW7 4PT

  21/5296/HSE Submitted 5 Oct 2021 150 yards away

  Changes to windows and doors including, alterations to window and door openings at ground floor level to the rear elevation and blocking in a window on the side elevation

  Granted Householder Windows or glazing 12 docs
  Domestic

• 26/3827/HSE Awaiting decision

  43 Hermitage Lane London NW2 2HE

  Single storey rear extension with 3no. rooflights following demolition of the existing conservatory. Replacement front bay window and entrance porch. First floor rear juliette balcony. Changes to fenestration including new window openings and enlarged front rooflight

  22 Oct 2026 Householder
• 26/3833/HSE Awaiting decision

  47 Holne Chase London N2 0QG

  Single storey rear extension. Replacement of single glazed windows with double glazing. Alterations to side/rear fenestration. Alterations and replacement of existing rear dormer window addition of 2no. side dormer windows and 3no. rooflights. Installation of cameras and wall lights. Replacement of the front entrance and garage doors, installation of timber side garden gates

  22 Oct 2026 Householder
• 26/3815/HSE Awaiting decision

  17 Hurstwood Road London NW11 0AS

  Single storey rear extension

  21 Oct 2026 Householder
• 26/3800/HSE Awaiting decision

  29 Monks Avenue Barnet EN5 1BZ

  Single storey side and rear infill extension including new front porch following demolition of the side/rear storage.

  Received 20 Oct, published by the council 21 Oct 2026 Householder
• 26/3791/HSE Awaiting decision

  149 Montrose Avenue Edgware HA8 0DZ

  New front hardstanding and vechicular access to provide off-street parking

  Received 20 Oct, published by the council 21 Oct 2026 Householder