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Planning application

18 Athenaeum Road London N20 9AE

Granted Barnet 26/0820/192 Proposed Lawful Development Certificate

Works: Extension Loft or dormer Windows or glazing Small domestic

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

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Single storey rear extension with 2no. rooflights. Roof extension involving rear dormer window 2no. front facing rooflights and new side gable window

As published by the council, reference 26/0820/192

Application record

Reference
26/0820/192
Type
Proposed Lawful Development Certificate
Status
Lawful
Decision
Granted As published: Lawful
Received
4 Mar 2026
Validated
5 Mar 2026
Decided
29 Apr 2026
Ward
Whetstone
Decision by
Delegated Decision
Postcode
N20 9AE

Site history

Applications at this address on the Barnet register

This site has had 4 applications since 2026: 1 approved, 0 refused.

  • 26/2902/PNH Decided

    18 Athenaeum Road London N20 9AE

    Single storey rear extension with a proposed depth of 4.00 metres, maximum height of 3.50 metres and eaves height of 2.50 metres.

    Submitted 5 Aug 2026 Prior approval
  • 26/2083/HSE Decided

    18 Athenaeum Road London N20 9AE

    Two storey side extension following demolition of the existing garage

    Submitted 4 Jun 2026 Householder
  • 26/1893/PNH Withdrawn

    18 Athenaeum Road London N20 9AE

    Single storey rear extension with a proposed maximum depth of 6.0m, a maximum height of 2.95m and an eaves height of 2.85m

    Decided 11 Jun 2026 Prior approval

Timeline

Dates from the published record

  1. 4 Mar 2026

    Received by Barnet

  2. 5 Mar 2026

    Validated

    Checked as complete and ready for consideration.

  3. 29 Apr 2026

    Decision issued: Lawful

  4. 25 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

TheDesignConsultant Ltd Agent, registered in London

Active · incorporated 2025 · London

2 applications on PlanIndex

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Documents

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

5 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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What this grant of permission means

Barnet granted permission on 29 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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

  • 18 Athenaeum Road London N20 9AE

    26/1893/PNH Submitted 20 May 2026 50 yards away

    Single storey rear extension with a proposed maximum depth of 6.0m, a maximum height of 2.95m and an eaves height of 2.85m

    Withdrawn Prior approval Extension 8 docs
    Small domestic

  • 18 Athenaeum Road London N20 9AE

    26/2083/HSE Submitted 4 Jun 2026 50 yards away

    77% historically approved · decision due ~21 Aug

    Two storey side extension following demolition of the existing garage

    Decided Householder Extension Demolition 6 docs
    Domestic

  • 18 Athenaeum Road London N20 9AE

    26/2902/PNH Submitted 5 Aug 2026 50 yards away

    56% historically approved · decision due ~1 Oct

    Single storey rear extension with a proposed depth of 4.00 metres, maximum height of 3.50 metres and eaves height of 2.50 metres.

    Decided Prior approval Extension
    Small domestic

  • 16 Oxford Gardens London N20 9AG

    25/5161/HSE Submitted 23 Dec 2025 50 yards away

    77% historically approved · decision due ~18 Feb

    Single storey side/rear extension with 3no. rooflights with new patio area. New front porch. Conversion of the existing garage into habitable room insertion of window to replace garage door. New side boundary fencing

    Awaiting decision Householder Extension Loft or dormer +1 8 docs
    Small domestic

  • 54 Oakleigh Gardens London N20 9AB

    21/5230/FUL Submitted 30 Sep 2021 50 yards away

    Conversion of existing dwelling into 2no self contained flats. Associated recycling/refuse storage area, cycle store and amenity space

    Refused Full applications New dwelling 13 docs
    Domestic

  • 52 Oakleigh Gardens London N20 9AB

    26/0976/S73 Submitted 16 Mar 2026 100 yards away

    Variation of condition 1 (Approved plans) 3 (Materials) pursuant to planning permission 25/1604/HSE dated 05/06/2025 for `Roof extension involving rear dormer window and 2no. front facing rooflights.` Amendments include change of material on the rear elevation from tile to zinc

    Granted Conditions Extension Loft or dormer +1 8 docs

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