Planning application
103 Cornwall Avenue Southall UB1 2TQ
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
Alteration of roof from hip to gable end; and rear roof extension (Application for a Lawful Development Certificate for a Proposed Development)
As published by the council, reference 254463CPL
Application record
- Reference
- 254463CPL
- Type
- Certificate of Lawfulness - Proposed
- Status
- Refused
- Decision
- Refused
- Received
- 26 Nov 2025
- Validated
- 26 Nov 2025
- Decided
- 14 Jan 2026
- Ward
- Lady Margaret
- Decision by
- Delegated Decision
- Postcode
- UB1 2TQ
Site history
Applications at this address on the Old Oak and Park Royal Development Corporation register
This site has had 2 applications since 2025: 1 approved, 1 refused.
-
260944CPL Granted
103 Cornwall Avenue Southall UB1 2TQ
Alteration of roof from hip to gable end; rear roof extension; installation of one rooflight to front roofslope and a window within side gable wall (Lawful Development Certificate for a Proposed Development)
Timeline
Dates from the published record
-
26 Nov 2025
Received by Old Oak and Park Royal Development Corporation
-
14 Jan 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 planning consultancy registered in London
40 applications on PlanIndex · across 6 councils · 70% 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
4 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
-
103 Cornwall Avenue Southall UB1 2TQ
Alteration of roof from hip to gable end; and rear roof extension (Application for a Lawful Development Certificate for a Proposed Development)
Refused Lawful development Extension Loft or dormer 4 docs -
122 Cornwall Avenue Southall UB1 2TQ
Single storey rear outbuilding (Following the demolition of the rear conservatory)
Granted Householder Extension Demolition 9 docsSmall domestic -
101 Cornwall Avenue Southall UB1 2TQ
Continue to use the dwellinghouse as HMO (Sui Generis) (Lawful Development Certificate for an Existing Use)
Refused Lawful development 15 docsDomestic -
122 Cornwall Avenue Southall UB1 2TQ
Single storey rear outbuilding (Following the demolition of the rear conservatory)
Granted Householder Extension Demolition 9 docsSmall domestic -
81 Cornwall Avenue Southall UB1 2TQ
75% historically approved · decision due ~18 Aug
Conversion of single dwelling into 2 x self contained flats (2 X 1 Bedroom) with amenity space, bin/cycle stores & off-street parking, and installation of a roof lantern to the single storey rear extension (Retrospective application)
Awaiting decision Full applications New dwelling Extension +1 10 docsSmall domestic -
81 Cornwall Avenue Southall UB1 2TQ
87% historically approved · decision due ~18 Aug
Conversion of single dwelling into 2 x self contained flats (2 X 1 Bedroom) with amenity space, bin/cycle stores & off-street parking, and installation of a roof lantern to the single storey rear extension (Retrospective application)
Awaiting decision New dwelling Extension +1 10 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)