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Planning application

1515 High Road London N20 9PJ

Awaiting decision Barnet 25/4919/192 Proposed Lawful Development Certificate

Works: Extension Loft or dormer Demolition 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 extension with 1no. rooflight and new patio area following demolition of existing conservatory and garage

As published by the council, reference 25/4919/192

Application record

Reference
25/4919/192
Type
Proposed Lawful Development Certificate
Status
Pending Consideration
Received
8 Dec 2025
Validated
10 Dec 2025
Ward
Barnet Vale
Postcode
N20 9PJ

Site history

Applications at this address on the Barnet register

This site has had 2 applications since 2025: 1 approved, 0 refused.

  • 25/4321/PNH Granted

    1515 High Road London N20 9PJ

    Single storey L-shaped rear extension with proposed depths of 3.0 metres and 4.85 metres, maximum height of 3.0 metres and eaves height of 2.90 metres, following demolition of existing conservatory and garage.

    Decided 4 Dec 2025 Prior approval

Timeline

Dates from the published record

  1. 8 Dec 2025

    Received by Barnet

  2. 10 Dec 2025

    Validated

    Checked as complete and ready for consideration.

  3. 10 Aug 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 4 February 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.

Who's behind it

Company information only, from the register and Companies House

CASA Architecture + Design, Ltd Agent, an architecture practice registered in London

Active · incorporated 2019 · London

18 applications on PlanIndex · across 4 councils · 75% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

14 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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Open the documents

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 lawful development applications in a median of 28 days. More in our guide to how long planning decisions take.

About lawful development applications

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.

Nearby applications

Within 0.3 miles

  • 1515 High Road London N20 9PJ

    25/4321/PNH Submitted 29 Oct 2025 50 yards away

    Single storey L-shaped rear extension with proposed depths of 3.0 metres and 4.85 metres, maximum height of 3.0 metres and eaves height of 2.90 metres, following demolition of existing conservatory and garage.

    Granted Prior approval Extension Demolition 16 docs
    Small domestic

  • 1522 High Road London N20 9PT

    25/4157/CON Submitted 16 Oct 2025 100 yards away

    Submission of details of condition 18 (Excavations for Services - tree protect) 19 (Levels) pursuant to planning permission 23/5309/FUL dated 12/02/2024

    Granted Conditions Trees 6 docs

  • 1522 High Road London N20 9PT

    24/1719/CON Submitted 30 Apr 2024 100 yards away

    Submission of details of condition 8 (Demolition and Construction Mangement Plan) pursuant to planning permission 23/5309/FUL dated 12/02/2024

    Granted Conditions Demolition 4 docs

  • 1522 High Road London N20 9PT

    25/4144/CON Submitted 15 Oct 2025 100 yards away

    93% historically approved · decision due ~11 Dec

    Submission of details of condition 7 (Cycle parking/storage) 20 (Refuse/recycling storage) pursuant to planning permission 23/5309/FUL dated 12/02/2024

    Awaiting decision Conditions 2 docs

  • 21 Walfield Avenue London N20 9PS

    25/3858/PNH Submitted 18 Sep 2025 100 yards away

    56% historically approved · decision due ~14 Nov

    Single storey rear extension with a proposed depth of 5.00m, maximum height of 3.70m and eaves height of 3.00m.

    Awaiting decision Prior approval Extension 3 docs
    Small domestic

  • 14 Walfield Avenue London N20 9PR

    25/4817/PNH Submitted 27 Nov 2025 100 yards away

    Ground floor single storey rear extension projecting 4m from existing rear wall and 3m in height. Demolition of existing garage.

    Granted Prior approval Extension Demolition 6 docs
    Small domestic

In Barnet

  • 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