Planning application
42 Cuckoo Avenue Hanwell W7 1BX
Works: Extension Loft or dormer
Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.
Proposal
Rear roof dormer extension (involving conversion of roofspace to habitable use), incorporating Juliet balcony; installation of three rooflights to front roofslope; and associated internal alterations (Application for a Lawful Development Certificate for a Proposed Development)
As published by the council, reference 261187CPL
Application record
- Reference
- 261187CPL
- Type
- Certificate of Lawfulness - Proposed
- Status
- Refused
- Decision
- Refused
- Received
- 18 Mar 2026
- Validated
- 18 Mar 2026
- Decided
- 12 May 2026
- Ward
- North Hanwell
- Decision by
- Delegated Decision
- Postcode
- W7 1BX
Site history
Applications at this address on the Old Oak and Park Royal Development Corporation register
This site has had 3 applications since 2026: 2 approved, 1 refused.
-
262406HH Granted
42 Cuckoo Avenue Hanwell W7 1BX
Rear roof dormer extension (following removal of solar panels) (involving conversion of roofspace to habitable use); installation of two rooflights to front roofslope
-
261351HH Granted
42 Cuckoo Avenue Hanwell W7 1BX
Single storey rear extension and installation of sliding doors; single storey front porch extension; internal and external alterations
Timeline
Dates from the published record
-
18 Mar 2026
Received by Old Oak and Park Royal Development Corporation
-
12 May 2026
Decision issued: Refused
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Agent on file, a design practice registered in Northolt
27 applications on PlanIndex · across 7 councils · 71% 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
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 this refusal means
Old Oak and Park Royal Development Corporation 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 500 metres
-
42 Cuckoo Avenue Hanwell W7 1BX
Rear roof dormer extension (involving conversion of roofspace to habitable use), incorporating Juliet balcony; installation of three rooflights to front roofslope; and associated internal alterations (Application for a Lawful Development Certificate for a Proposed Development)
Refused Lawful development Extension Loft or dormer 8 docs -
42 Cuckoo Avenue Hanwell W7 1BX
Single storey rear extension and installation of sliding doors; single storey front porch extension; internal and external alterations
Granted Householder Extension 15 docsSmall domestic -
42 Cuckoo Avenue Hanwell W7 1BX
Single storey rear extension and installation of sliding doors; single storey front porch extension; internal and external alterations
Granted Householder Extension 15 docsSmall domestic -
42 Cuckoo Avenue Hanwell W7 1BX
Rear roof dormer extension (following removal of solar panels) (involving conversion of roofspace to habitable use); installation of two rooflights to front roofslope
Granted Householder Extension Loft or dormer 16 docsDomestic -
42 Cuckoo Avenue Hanwell W7 1BX
87% historically approved · decision due ~11 Aug
Rear roof dormer extension (following removal of solar panels) (involving conversion of roofspace to habitable use); installation of two rooflights to front roofslope
Decided Extension Loft or dormer -
55 Cuckoo Avenue Hanwell London W7 1BW
Single-storey rear extension (following demolition of existing conservatory) (Lawful Development Certificate for a Proposed Development).
Granted Lawful development Extension Demolition 6 docsSmall domestic
Other lawful development applications
In Old Oak and Park Royal Development Corporation
-
262843CPL Refused
29 Nutfield Gardens Northolt UB5 6LU
Alteration of roof from hip to gable end, rear roof extension; installation of three front rooflights (Lawful Development Certificate for a Proposed Development)
-
262774CPL Granted
133 Cleveland Road West Ealing W13 0EN
Alteration of roof from hip to gable end and rear roof extension; rear dormer enlargement; installation of three rooflights to front roofslope (Lawful Development Certificate for a Proposed Development)
-
262610CPL Refused
6 Morden Gardens Greenford UB6 0LT
Single storey rear extension (following demolition of rear addition) (Lawful Development Certificate for a Proposed Development)
-
262475CPL Granted
80 Windmill Lane Greenford UB6 9DS
Rear roof extension, and installation of three roof lights to front roofslope (Lawful Development Certificate for a Proposed Development)
-
262678CPL Granted
19 Southwell Avenue Northolt UB5 4DX
Rear roof extension; installation of three front rooflights (Lawful Development Certificate for a Proposed Development)