Planning application
262683CPE
1 Speldhurst Road Chiswick W4 1BX
Proposal
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)
As published by the council, reference 262683CPE
Timeline
Dates from the published record
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7 Jul 2026
Received by Old Oak and Park Royal Development Corporation
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3 Aug 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Old Oak and Park Royal Development Corporation for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
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262683CPE Awaiting decision
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)
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P/2008/4411 Refused
12 Bayham Road Chiswick London W4 1BJ London
Single storey rear extension
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P/2008/4411 Refused
12 Bayham Road Chiswick London W4 1BJ London
Single storey rear extension
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242802CPL Granted
4 Bayham Road Chiswick W4 1BJ
Construction of an extension to existing outbuilding (Lawful Development Certificate for Proposed Development)
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242802CPL Granted
4 Bayham Road Chiswick W4 1BJ
Construction of an extension to existing outbuilding (Lawful Development Certificate for Proposed Development)
-
213741FUL Granted
87 Southfield Road Chiswick London W4 1BB
Rear roof extension incorporating a Juliet balcony; part rear roof extension to rear outrigger roof slope; installation of three roof lights to front roof slope; removal chimney stack; raising party wall to first floor flat; installation of one obscure-glazed side window.
Other lawful development applications
In Old Oak and Park Royal Development Corporation
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262398CPL Granted
22 Endsleigh Road West Ealing W13 0RE
Rear dormer roof extension to rear (main) roofslope (involving conversion of roofspace to habitable use); rear dormer roof extension to rear outrigger; (following demolition of existing chimney stack above roof level to rear outrigger); installation of two rooflight to front roofslope; and associated internal alterations (Application for a Lawful Development Certificate for a Proposed Development)
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262426CPL Granted
8 Oakfield Gardens Greenford UB6 8SD
Single storey rear garden outbuilding (Lawful Development Certificate for a Proposed Development)
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253362OPDLDE Decided
13 Wendover Court Western Avenue Acton W3 0TG
Continued use of property (Use Class C3) as House in Multiple Occupation (Use Class C4)(Lawful Development Certificate for Existing Use)
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260468CPL Granted
46 Rose Gardens Ealing W5 4JX
Replacement of windows, external doors, fixtures and fittings including front entrance canopy, fascias and rainwater goods; and all other associated internal and external alterations and improvements (Regulation 3 - Application by London Borough of Ealing) (Lawful Development Certificate for a Proposed Development)
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262275CPL Granted
19 Gordon Road Southall UB2 5QE
Rear roof extension; rear outrigger roof extension; installation of two rooflights to front roofslope (Lawful Development Certificate for a Proposed Development)