Planning application
4 Mount Avenue Southall UB1 2LH
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
Roof extension to rear (main) roof slope; part rear roof extension to rear outrigger roof slope and installation of two roof lights to front roofslope (Lawful Development Certificate for a Proposed Development)
As published by the council, reference 260700CPL
Application record
- Reference
- 260700CPL
- Type
- Certificate of Lawfulness - Proposed
- Status
- Refused
- Decision
- Refused
- Received
- 18 Feb 2026
- Validated
- 18 Feb 2026
- Decided
- 10 Apr 2026
- Ward
- Lady Margaret
- Decision by
- Delegated Decision
- Postcode
- UB1 2LH
Site history
Applications at this address on the Old Oak and Park Royal Development Corporation register
This site has had 4 applications since 2026: 2 approved, 2 refused.
-
262196CPL Granted
4 Mount Avenue Southall UB1 2LH
Roof extension to rear (main) roof slope; part rear roof extension to rear outrigger roof slope and installation of two roof lights to front roofslope (Lawful Development Certificate for a Proposed Development)
-
262197PALHE Granted
4 Mount Avenue Southall UB1 2LH
Single storey (Max 6m deep and Max 3m high) rear extension (42 days Prior Notification Process)
-
260699HH Refused
4 Mount Avenue Southall UB1 2LH
Single storey rear and side extension (following demolition of existing rear extension)
Timeline
Dates from the published record
-
18 Feb 2026
Received by Old Oak and Park Royal Development Corporation
-
10 Apr 2026
Decision issued: Refused
-
10 Aug 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
5 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
-
4 Mount Avenue Southall UB1 2LH
Single storey rear and side extension (following demolition of existing rear extension)
Refused Householder Extension Demolition 8 docsSmall domestic -
4 Mount Avenue Southall UB1 2LH
Roof extension to rear (main) roof slope; part rear roof extension to rear outrigger roof slope and installation of two roof lights to front roofslope (Lawful Development Certificate for a Proposed Development)
Refused Lawful development Extension Loft or dormer 5 docs -
4 Mount Avenue Southall UB1 2LH
Single storey rear and side extension (following demolition of existing rear extension)
Refused Householder Extension Demolition 8 docsSmall domestic -
42 Mount Avenue Southall UB1 2LH
Single rear and side extension.
Granted Householder Extension 13 docsDomestic -
42 Mount Avenue Southall UB1 2LH
Single rear and side extension.
Granted Householder Extension 13 docsDomestic -
4 Mount Avenue Southall UB1 2LH
87% historically approved · decision due ~25 Jul
Roof extension to rear (main) roof slope; part rear roof extension to rear outrigger roof slope and installation of two roof lights to front roofslope (Lawful Development Certificate for a Proposed Development)
Decided Extension Loft or dormer
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)