Planning application
70 Weirdale Avenue London N20 0AG
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 with juliette balcony and 2no. front facing rooflights
As published by the council, reference 26/0397/192
Application record
- Reference
- 26/0397/192
- Type
- Proposed Lawful Development Certificate
- Status
- Pending Consideration
- Received
- 2 Feb 2026
- Validated
- 3 Feb 2026
- Ward
- Brunswick Park
- Postcode
- N20 0AG
Timeline
Dates from the published record
-
2 Feb 2026
Received by Barnet
-
3 Feb 2026
Validated
Checked as complete and ready for consideration.
-
10 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 31 March 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, a design practice
5 applications on PlanIndex · across 2 councils
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
8 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
-
1 Weirdale Avenue London N20 0AN
77% historically approved · decision due ~5 Oct
Single storey rear extension following demolition of the existing conservatory. Alterations to patio steps. (amended description).
Awaiting decision Householder Extension DemolitionSmall domestic -
96A Weirdale Avenue London N20 0AH
95% historically approved · decision due ~28 May
Submission of details of condition 6 (Details of Cycle Parking and Storage) 7 (Refuse and Recycling) 8 (Hard and soft landscaping) pursuant to planning permission 23/2239/FUL dated 02/01/2024
Awaiting decision Conditions 4 docs -
96A Weirdale Avenue London N20 0AH
Submission of details of condition 13 (Low Impact Lighting - Bats) pursuant to planning permission 23/2239/FUL dated 02/01/2024
Granted Conditions 4 docs -
96A Weirdale Avenue London N20 0AH
70% historically approved · decision due ~11 Feb
Non material amendment to planning permission original ref 23/2239/FUL dated 02/01/2024 for 'Demolition of existing 2no. garages, removal of existing chimney and pitched roof and partial demolition of the front elevation. Conversion of existing 2no. flats into 5no. self-contained flats including the construction of 2 no. two storey side extensions; a two storey front and rear extensions (incorporating a new lower ground floor level to the rear); and a replacement roof and chimney to create a new second floor level. Provision of 5 no. off-street parking spaces, cycle parking, refuse storage and amenity spaces'. Amendments includes alterations to the wording of the proposed development
Awaiting decision Amendments New dwelling Extension +2 11 docsSeveral homes -
98 Weirdale Avenue London N20 0AH
Single storey side/rear extension with new patio area following demolition of the existing garage. First floor side extension. Hip-to-gable roof extension (amended description)
Refused Householder Extension Loft or dormer +1 12 docsSmall domestic -
98 Weirdale Avenue London N20 0AH
77% historically approved · decision due ~8 Apr
Part single, part two-storey side and rear extension with parapet wall. Associated alterations to existing patio with new access steps to garden. Single storey front/side extension to existing garage with new flat roof
Awaiting decision Householder Extension 18 docsSmall domestic
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