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Planning application

8 Thyra Grove London N12 8HB

Granted Barnet 26/0926/192 Proposed Lawful Development Certificate

Works: Extension Loft or dormer Windows or glazing

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

Proposal

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

As published by the council, reference 26/0926/192

Application record

Reference
26/0926/192
Type
Proposed Lawful Development Certificate
Status
Lawful
Decision
Granted As published: Lawful
Received
11 Mar 2026
Validated
11 Mar 2026
Decided
5 May 2026
Ward
West Finchley
Decision by
Delegated Decision
Postcode
N12 8HB

Site history

Applications at this address on the Barnet register

This site has had 4 applications since 2026: 1 approved, 2 refused.

  • 26/2358/PNH Refused

    8 Thyra Grove London N12 8HB

    Single storey rear extension with a maximum proposed depth of 4.9m, a maximum height of 3.42m and an eaves height of 2.93m

    Decided 4 Aug 2026 Prior approval
  • 26/2357/PNH Refused

    8 Thyra Grove London N12 8HB

    Single storey rear extension with a maximum proposed depth of 6.0m, a maximum height of 3.42m and an eaves height of 2.93m.

    Decided 4 Aug 2026 Prior approval
  • 26/1850/PNH Withdrawn

    8 Thyra Grove London N12 8HB

    Single storey rear extension following demolition of existing rear extension at a proposed depth of 6.0m from outrigger and 6.0m from the original rear wall, a maximum height of 3.42m and an eaves height of 2.93m

    Decided 12 Jun 2026 Prior approval

Timeline

Dates from the published record

  1. 11 Mar 2026

    Received by Barnet

  2. 5 May 2026

    Decision issued: Lawful

  3. 25 Jul 2026

    Added to PlanIndex

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.

Watch members (£5 a month) open the document list from here.

Open the documents

What this grant of permission means

Barnet granted permission on 5 May 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

  • 8 Thyra Grove London N12 8HB

    26/2358/PNH Submitted 22 Jun 2026 50 yards away

    Single storey rear extension with a maximum proposed depth of 4.9m, a maximum height of 3.42m and an eaves height of 2.93m

    Refused Prior approval Extension 10 docs
    Small domestic

  • 8 Thyra Grove London N12 8HB

    26/2357/PNH Submitted 22 Jun 2026 50 yards away

    Single storey rear extension with a maximum proposed depth of 6.0m, a maximum height of 3.42m and an eaves height of 2.93m.

    Refused Prior approval Extension 10 docs
    Small domestic

  • 8 Thyra Grove London N12 8HB

    26/1850/PNH Submitted 18 May 2026 50 yards away

    Single storey rear extension following demolition of existing rear extension at a proposed depth of 6.0m from outrigger and 6.0m from the original rear wall, a maximum height of 3.42m and an eaves height of 2.93m

    Withdrawn Prior approval Extension Demolition 11 docs
    Small domestic

  • 11 Thyra Grove London N12 8HB

    26/3576/HSE Submitted 2 Oct 2026 50 yards away

    77% historically approved · decision due ~27 Nov

    Single storey rear extension with new patio area. Changes to ground floor side fenestration

    Awaiting decision Householder Extension Windows or glazing
    Small domestic

  • 11 Thyra Grove London N12 8HB

    25/5143/PNH Submitted 22 Dec 2025 50 yards away

    56% historically approved · decision due ~16 Feb

    Single storey rear extension with a proposed depth of 6.00m, maximum height of 3.98m and eaves height of 2.98m following the demolition of the existing conservatory

    Awaiting decision Prior approval Extension Demolition 7 docs
    Small domestic

  • 11 Thyra Grove London N12 8HB

    26/2208/PNH Submitted 15 Jun 2026 50 yards away

    2No. single storey rear extensions with a proposed depth of 6.00m, maximum height of 3.98m and eaves height of 2.98m following the demolition of the existing conservatory.

    Granted Prior approval Extension Demolition 9 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