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Planning application

143 Colindale Avenue London NW9 5HB

Awaiting decision Barnet 26/3647/PNH Prior approval

Works: Extension Small domestic

Read from the description, not a valuation. How we read the register

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Single storey rear/side extension with a proposed depth of 6 metres, maximum height of 2.9 metres and eaves height of 2.85 metres;

As published by the council, reference 26/3647/PNH

Application record

Reference
26/3647/PNH
Category
Prior approval
Status
Pending Consideration
Received
8 Oct 2026
Validated
8 Oct 2026
Postcode
NW9 5HB

Site history

Applications at this address on the Barnet register

This site has had 5 applications since 2025: 1 approved, 2 refused.

  • 25/4749/192 Awaiting decision

    143 Colindale Avenue London NW9 5HB

    Erection of a rear outbuilding

    Submitted 27 Nov 2025 Lawful development
  • 25/3364/192 Granted

    143 Colindale Avenue London NW9 5HB

    Roof extension involving rear dormer window and 2no. front facing rooflights

    Decided 7 Oct 2025 Lawful development
  • 25/3362/192 Refused

    143 Colindale Avenue London NW9 5HB

    Erection of a garden outhouse

    Decided 17 Oct 2025 Lawful development
  • 25/3363/PNH Refused

    143 Colindale Avenue London NW9 5HB

    Single storey rear extension with a depth of 6.00 metres, a maximum height of 2.90 metres and an eaves height of 2.85 metres

    Decided 17 Sep 2025 Prior approval

Timeline

Dates from the published record

  1. 8 Oct 2026

    Received by Barnet

  2. 9 Oct 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 3 December 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.

What happens while it is decided

This application is with Barnet for determination, against a statutory target of eight weeks. Over the last year Barnet decided prior approval applications in a median of 36 days. More in our guide to how long planning decisions take.

About prior approval applications

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 71 Colindale Avenue London NW9 5HB

    26/2615/HSE Submitted 13 Jul 2026 50 yards away

    77% historically approved · decision due ~8 Sep

    Part single, part two storey rear extension following demolition of the existing conservatory. Single storey side extension to outrigger with 3no. rooflights, following demolition of existing side projection (amended description)

    Decided Householder Extension Loft or dormer +1
    Small domestic

  • 101 Colindale Avenue London NW9 5HB

    26/2726/HSE Submitted 23 Jul 2026 50 yards away

    77% historically approved · decision due ~17 Sep

    Single storey side/rear wraparound extension with 5no. rooflights. Changes to fenestration. (amended description)

    Withdrawn Householder Extension Loft or dormer +1
    Small domestic

  • 71 Colindale Avenue London NW9 5HB

    26/2070/192 Submitted 3 Jun 2026 50 yards away

    80% historically approved · decision due ~29 Jul

    Roof extension involving rear dormer window. Erection of a rear outbuilding with 4no. rooflights

    Awaiting decision Lawful development Extension Loft or dormer +1 2 docs

  • Land To The North Of Substation Joslin Avenue London NW9 5HW

    TPP/0774/25 Submitted 18 Nov 2025 100 yards away

    1 x Lombardy Poplar (applicants ref. T38) - Monolith to height of 3m. Standing in Area A1 of Tree Preservation Order.

    Granted Trees 9 docs

  • Fletcher Court 1 Joslin Avenue London NW9 5HW

    26/0506/192 Submitted 9 Feb 2026 100 yards away

    80% historically approved · decision due ~7 Apr

    Removal and replacement of combustible cladding and cavity barriers

    Awaiting decision Lawful development 5 docs

  • 143 Colindale Avenue London NW9 5HB

    25/4749/192 Submitted 27 Nov 2025 100 yards away

    80% historically approved · decision due ~22 Jan

    Erection of a rear outbuilding

    Awaiting decision Lawful development 3 docs

In Barnet

  • 26/3835/PNH Awaiting decision

    3 Devonshire Crescent London NW7 1DN

    Single storey rear extension with a proposed depth of 5.00 metres, maximum height of 3.48 metres and eaves height of 3.00 metres. Following demolition of existing rear outrigger.

    22 Oct 2026 Prior approval
  • 26/3832/PNH Awaiting decision

    48 Alverstone Avenue Barnet EN4 8EB

    Single storey rear extension with a proposed depth of 4.5 metres, maximum height of 3.15 metres and eaves height of 3 metres following demolition of existing rear extension.

    22 Oct 2026 Prior approval
  • 26/3823/PNH Awaiting decision

    7 Southbourne Crescent London NW4 2LB

    Single storey rear extension added to an existing extension with the total extension measuring 6.00 metres deep, with a maximum height of 3.00 metres and an eaves height of 3.00 metres.

    21 Oct 2026 Prior approval
  • 26/3809/PND Awaiting decision

    10 Clifford Road Barnet EN5 5PG

    Demolition of existing garage and attached pitched-roof structure

    21 Oct 2026 Prior approval
  • 26/3819/PNH Awaiting decision

    78 Russell Lane London N20 0AP

    2no. Single storey rear extensions with a proposed depth of 7.00 metres, maximum height of 3.60 metres and eaves height of 3.00 metres. Following demolition of the existing side/rear outrigger.

    Received 20 Oct, published by the council 22 Oct 2026 Prior approval