17 Colindeep Lane London NW9 6DU

1. 22 Jan 2026

   Received by Barnet

2. 10 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 19 March 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 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 lawful development applications in a median of 28 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 3 The Loning London NW9 6DR

  26/1797/PNH Submitted 13 May 2026 150 yards away

  Single storey rear extension with a proposed depth of 5.50 metres, maximum height of 4.00 metres and eaves height of 3.00 metres

  Refused Prior approval Extension 8 docs
  Small domestic

• 3 The Loning London NW9 6DR

  26/1498/192 Submitted 22 Apr 2026 150 yards away

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

  Granted Lawful development Extension Loft or dormer +1 7 docs

• 5 The Loning London NW9 6DR

  26/1415/RCU Submitted 16 Apr 2026 150 yards away

  Change of use of the property from a single family dwelling (Class C3) to a House in Multiple Occupation (HMO) (Class C4) (Retrospective Application)

  Withdrawn Amendments 6 docs
  Domestic

• 3 The Loning London NW9 6DR

  26/2609/HSE Submitted 13 Jul 2026 200 yards away

  77% historically approved · decision due ~7 Sep

  Single storey side and rear extension with 1no. roof lantern with access steps to garden following demolition of the existing garage (amended description and drawings)

  Decided Householder Extension Demolition +1
  Small domestic

• 95 Lynton Avenue London NW9 6PB

  26/3582/HSE Submitted 5 Oct 2026 200 yards away

  77% historically approved · decision due ~1 Dec

  Single storey rear extension with extended tiled roof

  Awaiting decision Householder Extension
  Small domestic

• 131 Rushgrove Avenue London NW9 6RG

  26/3858/HSE Submitted 23 Oct 2026 250 yards away

  77% historically approved · decision due ~18 Dec

  Single storey rear extension. New front porch

  Awaiting decision Householder Extension
  Small domestic

• 26/2679/192 Granted

  21 Myddelton Park London N20 0JH

  Single storey rear extension and increase in ridge height of existing rear outrigger (Amended description).

  Received 20 Jul, published by the council 7 Aug 2026 Lawful development
• 26/1362/191 Refused

  145 Cotswold Gardens London NW2 1PL

  Use as a House in Multiple Occupation (HMO) for 6 people

  Received 14 Apr, published by the council 25 Jul 2026 Lawful development
• 26/1907/191 Granted

  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)

  Received 21 May, published by the council 16 Aug 2026 Lawful development
• 26/2392/192 Refused

  6 Mostyn Road Edgware HA8 0JD

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

  Received 23 Jun, published by the council 9 Aug 2026 Lawful development
• 26/2059/192 Refused

  Low Ridge Rowley Lane Barnet EN5 3HS

  Erection of a rear outbuilding

  Received 3 Jun, published by the council 16 Aug 2026 Lawful development