Planning application
103 Cornwall Avenue Southall UB1 2TQ
Works: Extension Loft or dormer Windows or glazing
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
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)
As published by the council, reference 260944CPL
Application record
- Reference
- 260944CPL
- Type
- Certificate of Lawfulness - Proposed
- Status
- Permitted Development
- Decision
- Granted As published: Permitted Development
- Received
- 4 Mar 2026
- Validated
- 4 Mar 2026
- Decided
- 28 Apr 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.
-
254463CPL Refused
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)
Timeline
Dates from the published record
-
4 Mar 2026
Received by Old Oak and Park Royal Development Corporation
-
28 Apr 2026
Decision issued: Permitted Development
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Consilio Town Planning Agent, a planning consultancy registered in London
Active · incorporated 2017 · London
58 applications on PlanIndex · across 10 councils · 72% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
4 documents on file for this application
- OFFICERS REPORT
- DECISION NOTICE
- APPLICATIONFORMREDACTED
- ALL IN ONE CG1398 - 103 CORNWALL AVENUE - PLANNING - A - 19.01.26
Watch members (£5 a month) open the document list from here.
Open the documentsWhat this grant of permission means
Old Oak and Park Royal Development Corporation granted permission on 28 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. 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
-
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)
Granted Lawful development Extension Loft or dormer +1 4 docs -
101 Cornwall Avenue Southall UB1 2TQ
86% historically approved · decision due ~15 Dec
Conversion of dwellinghouse to HMO(C4) for 5 bed for 6 People with provision of cycle storage, bin storage; front porch extension (following demolition of existing front porch extension; single storey front/side extension; single storey rear extension (following demolition of existing conservatory); single storey detached outbuilding internal and external alterations; alterations to side and rear fenestrations
Awaiting decision Extension DemolitionSmall domestic -
101 Cornwall Avenue Southall UB1 2TQ
Continue to use the dwellinghouse as HMO (Sui Generis) (Lawful Development Certificate for an Existing Use)
Refused 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 -
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
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)