Planning application
24 Mountfield Road London N3 3NE
Works: Extension Loft or dormer Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Roof extension involving rear dormer window and 1no. rooflight
As published by the council, reference 26/0420/192
Application record
- Reference
- 26/0420/192
- Type
- Proposed Lawful Development Certificate
- Status
- Pending Consideration
- Received
- 4 Feb 2026
- Validated
- 4 Feb 2026
- Ward
- Finchley Church End
- Postcode
- N3 3NE
Timeline
Dates from the published record
-
4 Feb 2026
Received by Barnet
-
10 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 1 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 42 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Agent on file, registered in Grays
42 applications on PlanIndex · across 15 councils · 81% granted
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
16 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.
Trade members open them from here.
Open the documentsWhat happens while it is decided
The process from here
This application is with Barnet for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
-
24 Mountfield Road London N3 3NE
77% historically approved · decision due ~31 Mar
Single storey side and rear extension wrap-around extension with 5no. rooflights
Awaiting decision Householder Extension Loft or dormer 20 docsSmall domestic -
44 Mountfield Road London N3 3NP
77% historically approved · decision due ~9 Jun
Existing rear extension parapet to be raised and capped with concrete coping stones. Green roof to new flat roof and addition of sliding doors and window to rear. Changes to side fenestration
Awaiting decision Householder Extension Windows or glazing 16 docsDomestic -
54 Stanhope Avenue London N3 3NA
Single storey rear extension with a proposed depth of 6.00m, maximum height of 3.00m and eaves height of 3.00m
Refused Prior approval Extension 16 docsSmall domestic -
54 Stanhope Avenue London N3 3NA
Roof extension involving hip to gable, rear dormer window with juliette balcony, 3no. rear and 4no. front facing rooflights. Erection of a rear outbuilding
Decided Lawful development Extension Loft or dormer +1 19 docs -
2 And 2A Mountfield Road London N3 3NB
61% historically approved · decision due ~12 Jan
Conversion of existing 2no. dwellings into 4no. self-contained flats, including: Part single, part two storey rear extension; Roof extension involving creation of new mansard roof; Alterations to and conversion of existing garage to provide refuse and cycle storage; Provision of associated amenity space and off-street parking
Awaiting decision Full applications New dwelling Extension +2 18 docsSeveral homes -
2 And 2A Mountfield Road London N3 3NB
61% historically approved · decision due ~11 Aug
Demolition of existing garages and outbuilding/orangery; Conversion of the existing 2no. dwellings into 5no. self-contained residential units; including, Single storey rear extension with 2no. rooflights; Roof extension including hip to gable, 1no. front, side and rear dormer windows and 1no. side facing rooflight; Excavation and enlargement of existing basement including 2no. lighwells to side; Associated amenity space, refuse and cycle storage and provision of 3no. off-street parking spaces
Awaiting decision Full applications Extension Loft or dormer +2 14 docsSeveral homes
Other lawful development applications
In Barnet
-
26/1907/191 Decided
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)
-
26/2059/192 Decided
Low Ridge Rowley Lane Barnet EN5 3HS
Erection of a rear outbuilding
-
26/2066/192 Decided
355 Hendon Way London NW4 3NB
Roof extension involving rear dormer window and 3no. front facing rooflights. Removal of chimney on rear elevation (AMENDED DESCRIPTION)
-
26/1663/192 Decided
152 Deans Lane Edgware HA8 9NT
Change of use from single family dwellinghouse (Class C3a) to supported living accommodation Class C3b)
-
26/2025/192 Decided
18 Hale Drive London NW7 3DU
Roof extension involving hip to gable, rear dormer window, 2no. front facing rooflights and new side gable window