Planning application
40 Holne Chase London N2 0QQ
Works: Extension Loft or dormer Windows or glazing 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
Replacement of existing windows and doors on north and west elevations and front elevation outrigger window with double glazing. Changes to fenestration on front, side and rear elevations. Roof extension including 2no. rear dormer windows following the removal of the existing rear dormer window and rear facing rooflights. Installation of CCTV on front, side and rear elevations, and air conditioning unit with enclosure in rear garden. New side gate and hedge
As published by the council, reference 26/0647/HSE
Application record
- Reference
- 26/0647/HSE
- Type
- Householder Application
- Status
- Pending Consideration
- Received
- 19 Feb 2026
- Validated
- 20 Feb 2026
- Ward
- Garden Suburb
- Postcode
- N2 0QQ
Site history
Applications at this address on the Barnet register
This site has had 2 applications since 2025.
-
25/4885/HSE Withdrawn
40 Holne Chase London N2 0QQ
Excavation of new basement. Alterations and extension to roof including addition of 2no. rear dormer windows to replace existing dormer window and removal of rooflights. Alterations to windows and doors including new double glazing. Enlargement of select, existing ground floor North, East and West elevation windows. Installation of new air-con unit and enclosure to rear garden. New side gate and hedge. Internal Alterations
Timeline
Dates from the published record
-
19 Feb 2026
Received by Barnet
-
20 Feb 2026
Validated
Checked as complete and ready for consideration.
-
10 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 17 April 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
Simon Miller Architects Ltd Agent, an architecture practice registered in London
Active · incorporated 2005 · London
30 applications on PlanIndex · across 4 councils · 92% 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 recordDocuments
Plans, drawings, consultee responses and the officer's report
37 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 documentsWhat 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 householder applications in a median of 56 days. More in our guide to how long planning decisions take.
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
-
40 Holne Chase London N2 0QQ
Excavation of new basement. Alterations and extension to roof including addition of 2no. rear dormer windows to replace existing dormer window and removal of rooflights. Alterations to windows and doors including new double glazing. Enlargement of select, existing ground floor North, East and West elevation windows. Installation of new air-con unit and enclosure to rear garden. New side gate and hedge. Internal Alterations
Withdrawn Householder Extension Loft or dormer +1 32 docsDomestic -
47 Holne Chase London N2 0QG
77% historically approved · decision due ~17 Dec
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
Awaiting decision Householder Extension Loft or dormer +1Small domestic -
-
66 Kingsley Way London N2 0EW
1 x Plum - Fell.- (5 day notice) (amended description)
Decided Trees 5 docs -
-
35 Holne Chase London N2 0QL
Non-material amendments to planning permission reference 24/5480/HSE dated 11/02/25 for 'Conversion of the garage to habitable use, restoring the original 4 leaf vertical panelled doors; Enlarge the ground floor front window as a three light design with lower sills. Single storey rear extension under a flat lead roof with new French doors and side windows with lower sills. Insertion of a French door in the centre of the rear bay window with lower sills to the ground floor windows. Retention of the side hipped roof on the South East side with the unstable chimney stack rebuilt with a narrower lead roof side extension to the rear. Restoration of the retained dormer windows with arched lead roofs. Addition of a low skylight in the flat crown roof concealed by the surrounding ridge tiles. Minor adjustments to the fenestration on the North west Elevation with redundant external drainage pipework removed.' Amendments include, Rebuilding the rear bay; Adjustments to the fenestration on the side elevations; Replacement of the tiling with lead cheeks and roofs of the dormer windows; Replacement soil vent pipes, rainwater downpipes, gutters and fittings; Developed garden layout with bin store, shed, enclosed A/C condenser, pergola, external kitchen
Refused Amendments Extension Loft or dormer +1 5 docsSmall domestic
Other householder applications
In Barnet
-
26/3853/HSE Awaiting decision
30 Goldsmith Avenue London NW9 7HB
Single storey rear extension following demolition of the existing extension
-
26/3856/HSE Awaiting decision
229 Hale Drive London NW7 3EH
Single storey rear extension
-
26/3863/HSE Awaiting decision
12 Vale Drive Barnet EN5 2ED
Single storey side and rear extension
-
26/3858/HSE Awaiting decision
131 Rushgrove Avenue London NW9 6RG
Single storey rear extension. New front porch
-
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