Planning application
26/01579/CPD
30 Harcourt Road Windsor SL4 5LZ
Proposal
Certificate of lawfulness to determine whether the proposed single storey side extension is lawful.
As published by the council, reference 26/01579/CPD
Timeline
Dates from the published record
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24 Jun 2026
Received by Windsor and Maidenhead
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26 Jun 2026
Validated
Checked as complete and ready for consideration.
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25 Jul 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 Windsor and Maidenhead 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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23/00009/CPD Granted
14 Harcourt Road Windsor SL4 5NB
Certificate of lawfulness to determine whether the detached outbuilding with 2no. roof lights is lawful.
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22/02663/FULL Refused
14 Harcourt Road Windsor SL4 5NB
Part one, part two storey front/side/rear extensions and roof extension (part retrospective)
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22/02637/CPD Withdrawn
14 Harcourt Road Windsor SL4 5NB
Certificate of lawfulness to determine whether the detached Outbuilding is lawful.
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26/01746/FULL Awaiting decision
1 Losfield Road Windsor SL4 5LU
Garage conversion, ground floor front infill extension, part single part first floor part two storey side/rear extension, alterations to fenestration following the demolition of the existing elements.
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26/00660/CPD Granted
23 Tudor Way Windsor SL4 5LT
Certificate of lawfulness to determine whether the proposed construction of rear single storey extension is lawful.
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24/02336/FULL Refused
1 Surly Hall Walk Windsor SL4 5LY
Single storey front/side extension, hip to gable, raising of the eaves and ridge to facilitate a new first floor and alterations to fenestration.
Other lawful development applications
In Windsor and Maidenhead
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26/01836/CPD Awaiting decision
Rivendale 22A Gloucester Drive Wraysbury Staines TW18 4TY
Certificate of lawfulness to determine whether the proposed conversion of the existing garage into habitable space is lawful.
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26/01528/CPD Granted
Foxley Manor Forest Green Road Holyport Maidenhead SL6 2NW
Certificate of lawfulness to determine whether the proposed erection of an outbuilding is lawful.
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26/01532/CPD Granted
72 Highway Avenue Maidenhead SL6 5AQ
Certificate of Lawfulness to determine whether the proposed rear dormer roof extension and associated internal alterations to enlarge the existing loft accommodation is lawful.
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26/01823/CPD Awaiting decision
Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB
Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.
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26/01772/CPD Granted
18 Broken Furlong Eton Windsor SL4 6PD
Certificate of lawfulness to determine whether the proposed erection of a single storey rear detached annex to be used incidental with the host dwelling is lawful.