Planning application
78 Lyonsdown Road Barnet EN5 1JL
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
Removal and alteration of existing roof above existing two storey side. (Phase 1) Roof extension involving hip to gable, rear dormer with juliette balcony, 3no. front facing rooflights and new side gable window. (Phase 2)
As published by the council, reference 25/5114/192
Application record
- Reference
- 25/5114/192
- Type
- Proposed Lawful Development Certificate
- Status
- Pending Consideration
- Received
- 19 Dec 2025
- Validated
- 19 Dec 2025
- Ward
- Barnet Vale
- Postcode
- EN5 1JL
Site history
Applications at this address on the Barnet register
This site has had 3 applications since 2025: 1 approved, 0 refused.
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26/3619/HSE Awaiting decision
78 Lyonsdown Road Barnet EN5 1JL
Single storey side and rear extension. Front porch extension. Conversion of garage into habitable room, insertion of window to replace existing garage door. Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no. front facing rooflights. New side gable window
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26/1164/HSE Granted
78 Lyonsdown Road Barnet EN5 1JL
Single storey side and rear extension. Front porch extension. Roof extension involving hip to gable, rear dormer window with juliette balcony, 3no. front facing rooflights and new side gable window
Timeline
Dates from the published record
-
19 Dec 2025
Received by Barnet
-
10 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 13 February 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
CG Architects Agent, an architecture practice
78 applications on PlanIndex · across 12 councils · 83% 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
12 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 lawful development applications in a median of 28 days. More in our guide to how long planning decisions take.
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
-
78 Lyonsdown Road Barnet EN5 1JL
Single storey side and rear extension. Front porch extension. Roof extension involving hip to gable, rear dormer window with juliette balcony, 3no. front facing rooflights and new side gable window
Granted Householder Extension Loft or dormer +1 14 docsSmall domestic -
80 Lyonsdown Road Barnet EN5 1JL
77% historically approved · decision due ~13 Feb
New front hardstanding and vehicular access to provide off-street parking. New front hard and soft landscaping and brick fence wall
Awaiting decision Householder 7 docsSmall domestic -
80 Lyonsdown Road Barnet EN5 1JL
Single storey rear extension. Two storey side infill extension. New front porch. Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no. front facing rooflights. Changes to fenestration
Granted Householder Extension Loft or dormer +1 14 docsSmall domestic -
80 Lyonsdown Road Barnet EN5 1JL
Single storey rear extension. Two storey side infill extension. New front porch. Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no. front facing rooflights. Changes to fenestration.
Granted Householder Extension Loft or dormer +1 14 docsSmall domestic -
78 Lyonsdown Road Barnet EN5 1JL
77% historically approved · decision due ~2 Dec
Single storey side and rear extension. Front porch extension. Conversion of garage into habitable room, insertion of window to replace existing garage door. Roof extension involving hip to gable, rear dormer window with juliette balcony and 3no. front facing rooflights. New side gable window
Awaiting decision Householder Extension Loft or dormer +1Small domestic -
82 Lyonsdown Road Barnet EN5 1JL
79% historically approved · decision due ~11 Dec
Construction of a new flat roof following removal of an existing left hand side pitched roof (Stage 1). Alterations and extensions to roof including two partial hip to gables and rear dormer roof extensions and 3no. front facing roof lights (Stage 2).
Awaiting decision Extension Loft or dormer
Other lawful development applications
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).
-
26/1362/191 Refused
145 Cotswold Gardens London NW2 1PL
Use as a House in Multiple Occupation (HMO) for 6 people
-
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)
-
26/2392/192 Refused
6 Mostyn Road Edgware HA8 0JD
New front hardstanding and vehicular access to provide off-street parking
-
26/2059/192 Refused
Low Ridge Rowley Lane Barnet EN5 3HS
Erection of a rear outbuilding