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.
Watch members (£5 a month) open the document list 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 0.3 miles
-
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
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)
Granted Extension Loft or dormer 5 docs
Other lawful development applications
In Old Oak and Park Royal Development Corporation
-
263142CPL Granted
42 Gloucester Road Acton W3 8PD
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)
-
263690CPL Awaiting decision
133 Trinity Road Southall UB1 1ES
Rear roof extension, and installation of three roof lights to front roofslope (Lawful Development Certificate for a Proposed Development)
-
262683CPE Granted
1 Speldhurst Road Chiswick W4 1BX
Continuous use of conversion of the roof space to provide additional habitable accommodation, installation of rooflights to the front roof slope and a rear dormer and construction of a single-storey rear extension. External materials to match the existing dwelling (Lawful Development Certificate for an Existing Development)
-
254066CPE Refused
37 Robin Hood Way Greenford UB6 7QN
Use of ground floor flat and first/second floor flat (Use Class C3) as 2 x House in Multiple Occupation (Use Class C4) (Certificate of Lawfulness for an Existing Use)
-
262883CPL Granted
90 Church Road Hanwell W7 3BE
Rear roof extension (following removal of chimney); installation of two rooflight to front roofslope (Lawful Development Certificate for a Proposed Development)