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Planning application

12 Marlborough Avenue Edgware HA8 8UH

Decided Barnet 26/3039/HSE Householder

Works: Extension Loft or dormer Windows or glazing Small domestic

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

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

Part single, part two storey rear extension. First floor side extension. Roof extension involving side and rear wraparound dormer and side gable windows. New front porch with associated steps and railings

As published by the council, reference 26/3039/HSE

Application record

Reference
26/3039/HSE
Category
Householder
Status
Approved subject to conditions
Received
18 Aug 2026
Validated
19 Aug 2026
Postcode
HA8 8UH

Site history

Applications at this address on the Barnet register

This site has had 6 applications since 2025: 2 approved, 1 refused.

  • 26/3796/S73 Awaiting decision

    12 Marlborough Avenue Edgware HA8 8UH

    Variation of condition 1 (Approved plans) pursuant to planning permission 26/3039/HSE dated 14/10/2026 for `Part single, part two storey rear extension. First floor side extension. Roof extension involving side and rear wraparound dormer and side gable windows. New front porch with associated steps and railings.` Amendments include changes to the roof form over the side extension

    Submitted 20 Oct 2026
  • 26/2009/192 Awaiting decision

    12 Marlborough Avenue Edgware HA8 8UH

    Removal and alteration of existing roof above existing two storey side (Phase 1). Roof extension involving wraparound side and rear dormer windows (Phase 2). (Phase 2 to commence when phase 1 completed)

    Submitted 29 May 2026 Lawful development
  • 26/0630/192 Refused

    12 Marlborough Avenue Edgware HA8 8UH

    Roof extension involving side/rear wraparound dormer

    Decided 15 Apr 2026 Lawful development
  • 25/4255/HSE Granted

    12 Marlborough Avenue Edgware HA8 8UH

    Front porch extension including the relocation of the front door and new access steps. First floor side extension and alterations to the existing roof

    Decided 13 Jan 2026 Householder
  • 25/4254/PNH Granted

    12 Marlborough Avenue Edgware HA8 8UH

    Single storey rear extension with a proposed depth of 6.00m, maximum height of 3.00m and eaves height of 2.70m

    Decided 27 Nov 2025 Prior approval

Timeline

Dates from the published record

  1. 18 Aug 2026

    Received by Barnet

  2. 19 Aug 2026

    Validated

    Checked as complete and ready for consideration.

  3. 22 Aug 2026

    Added to PlanIndex

  4. 14 Oct 2026

    Status changed to Approved subject to conditions

    Previously Pending Consideration.

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/3796/S73 Awaiting decision

    12 Marlborough Avenue Edgware HA8 8UH

    Variation of condition 1 (Approved plans) pursuant to planning permission 26/3039/HSE dated 14/10/2026 for `Part single, part two storey rear extension. First floor side extension. Roof extension involving side and rear wraparound dormer and side gable windows. New front porch with associated steps and railings.` Amendments include changes to the roof form over the side extension

    Submitted 20 Oct 2026

After the decision

Barnet has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

About householder applications

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 12 Marlborough Avenue Edgware HA8 8UH

    26/3796/S73 Submitted 20 Oct 2026 50 yards away

    79% historically approved · decision due ~17 Dec

    Variation of condition 1 (Approved plans) pursuant to planning permission 26/3039/HSE dated 14/10/2026 for `Part single, part two storey rear extension. First floor side extension. Roof extension involving side and rear wraparound dormer and side gable windows. New front porch with associated steps and railings.` Amendments include changes to the roof form over the side extension

    Awaiting decision Extension Loft or dormer +1
    Small domestic

  • 12 Marlborough Avenue Edgware HA8 8UH

    25/4254/PNH Submitted 24 Oct 2025 50 yards away

    Single storey rear extension with a proposed depth of 6.00m, maximum height of 3.00m and eaves height of 2.70m

    Granted Prior approval Extension 6 docs
    Small domestic

  • 12 Marlborough Avenue Edgware HA8 8UH

    26/0630/192 Submitted 18 Feb 2026 50 yards away

    Roof extension involving side/rear wraparound dormer

    Refused Lawful development Extension Loft or dormer 6 docs

  • 12 Marlborough Avenue Edgware HA8 8UH

    25/4255/HSE Submitted 24 Oct 2025 50 yards away

    Front porch extension including the relocation of the front door and new access steps. First floor side extension and alterations to the existing roof

    Granted Householder Extension 6 docs
    Small domestic

  • 12 Marlborough Avenue Edgware HA8 8UH

    26/2009/192 Submitted 29 May 2026 50 yards away

    80% historically approved · decision due ~24 Jul

    Removal and alteration of existing roof above existing two storey side (Phase 1). Roof extension involving wraparound side and rear dormer windows (Phase 2). (Phase 2 to commence when phase 1 completed)

    Awaiting decision Lawful development Extension Loft or dormer +1 5 docs

  • 47 Warwick Avenue Edgware HA8 8UN

    25/4472/HSE Submitted 10 Nov 2025 50 yards away

    77% historically approved · decision due ~13 Jan

    Part single part two storey side and rear extensions following demolition of the existing garage. Roof extension involving hip to gable, rear dormer window and 3no. front facing rooflights. New front porch

    Awaiting decision Householder Extension Loft or dormer +2 8 docs
    Small domestic

In Barnet

  • 26/3827/HSE Awaiting decision

    43 Hermitage Lane London NW2 2HE

    Single storey rear extension with 3no. rooflights following demolition of the existing conservatory. Replacement front bay window and entrance porch. First floor rear juliette balcony. Changes to fenestration including new window openings and enlarged front rooflight

    22 Oct 2026 Householder
  • 26/3833/HSE Awaiting decision

    47 Holne Chase London N2 0QG

    Single storey rear extension. Replacement of single glazed windows with double glazing. Alterations to side/rear fenestration. Alterations and replacement of existing rear dormer window addition of 2no. side dormer windows and 3no. rooflights. Installation of cameras and wall lights. Replacement of the front entrance and garage doors, installation of timber side garden gates

    22 Oct 2026 Householder
  • 26/3815/HSE Awaiting decision

    17 Hurstwood Road London NW11 0AS

    Single storey rear extension

    21 Oct 2026 Householder
  • 26/3800/HSE Awaiting decision

    29 Monks Avenue Barnet EN5 1BZ

    Single storey side and rear infill extension including new front porch following demolition of the side/rear storage.

    Received 20 Oct, published by the council 21 Oct 2026 Householder
  • 26/3791/HSE Awaiting decision

    149 Montrose Avenue Edgware HA8 0DZ

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

    Received 20 Oct, published by the council 21 Oct 2026 Householder