Planning application
29 Sefton Avenue London NW7 3QB
Works: Extension Loft or dormer Demolition Windows or glazing Small domestic
Read from the description, not a valuation. How we read the register
Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.
Proposal
Roof extension involving removal of the existing side and rear dormer window and new hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window. Demolition of the existing chimney. Single storey front porch extension. Demolition of the existing garage. Alterations to the existing driveway including removal of side boundary wall
As published by the council, reference 25/5133/192
Application record
- Reference
- 25/5133/192
- Type
- Proposed Lawful Development Certificate
- Status
- Unlawful
- Decision
- Refused As published: Unlawful
- Received
- 22 Dec 2025
- Validated
- 22 Dec 2025
- Decided
- 16 Jan 2026
- Ward
- Edgware
- Decision by
- Delegated Decision
- Postcode
- NW7 3QB
Site history
Applications at this address on the Barnet register
This site has had 2 applications since 2025: 1 approved, 1 refused.
-
26/0580/192 Granted
29 Sefton Avenue London NW7 3QB
Roof extension involving removal of the existing side and rear dormer window and new hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window. Demolition of the existing chimney. Single storey front porch extension. Demolition of the existing garage. Alterations to the existing driveway including removal of side boundary wall
Timeline
Dates from the published record
-
22 Dec 2025
Received by Barnet
-
16 Jan 2026
Decision issued: Unlawful
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Greco+Rabin Architects Agent, an architecture practice
6 applications on PlanIndex · across 3 councils
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See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
17 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.
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Open the documentsWhat this refusal means
Barnet refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.
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
-
29 Sefton Avenue London NW7 3QB
Roof extension involving removal of the existing side and rear dormer window and new hip to gable, rear dormer window, 3no. front facing rooflights and new side gable window. Demolition of the existing chimney. Single storey front porch extension. Demolition of the existing garage. Alterations to the existing driveway including removal of side boundary wall
Granted Lawful development Extension Loft or dormer +2 15 docsSmall domestic -
31 Sefton Avenue London NW7 3QB
Non material amendment to planning permission 25/3239/HSE dated 01/10/2025 for 'First floor side extension. Roof extension involving hip to gable, rear dormer with glass balustrade for the juliette balcony and 3no. front facing rooflights. Changes to roof tiles and fenestration' Amendments includes removal of existing chimney and adjustment to front facing rooflights
Granted Amendments Extension Loft or dormer +2 9 docs -
16 Sefton Avenue London NW7 3QD
56% historically approved · decision due ~23 Nov
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.20 metres and eaves height of 3.00 metres.
Awaiting decision Prior approval ExtensionSmall domestic -
63 Sefton Avenue London NW7 3QE
56% historically approved · decision due ~14 Aug
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 4.00 metres and eaves height of 2.50 metres.
Awaiting decision Prior approval Extension 11 docsSmall domestic -
19 Downhurst Avenue London NW7 3QA
79% historically approved · decision due ~4 Aug
Roof extension with rear dormer windows, 2no. front facing roolights. New side gable window
Awaiting decision Extension Loft or dormer +1 -
2 Derwent Avenue London NW7 3DZ
80% historically approved · decision due ~1 Apr
Roof extension involving rear dormer windows and 2no. front facing rooflights
Awaiting decision Lawful development Extension Loft or dormer +1 5 docs
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
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26/2059/192 Refused
Low Ridge Rowley Lane Barnet EN5 3HS
Erection of a rear outbuilding