Planning application
26/00618/CPD
21 Laggan Road Maidenhead SL6 7JY
Proposal
Certificate of lawfulness to determine whether the proposed single storey rear extension is lawful.
As published by the council, reference 26/00618/CPD
Timeline
Dates from the published record
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9 Mar 2026
Received by Windsor and Maidenhead
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27 Apr 2026
Decision issued: Permitted Development
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25 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
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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26/00465/CPD Refused
21 Laggan Road Maidenhead SL6 7JY
Certificate of lawfulness to determine whether the proposed single storey rear extension is lawful.
-
22/02818/FULL Granted
50 Laggan Road Maidenhead SL6 7JZ
Replacement garage.
-
22/02423/FULL Granted
56 Laggan Road Maidenhead SL6 7JZ
x2 new front dormers and x1 rear dormer with x1 Juliet balcony to create a loft conversion and alterations to fenestration.
-
22/02364/PDXL Granted
78 Laggan Road Maidenhead SL6 7JZ
Single storey rear extension no greater than 6.00m in depth, 3.20m high with an eaves height of 2.92m.
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26/01689/FULL Awaiting decision
17 Laggan Square Maidenhead SL6 7LA
2no. front canopies, 3no. front rooflights, part single part two storey side/rear extension, hip to gable, 1no. loft conversion with 1no. rear dormer and 1no. detached outbuilding ancillary to the main dwelling following the demolition of the existing elements.
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26/00714/CPD Granted
17 Laggan Square Maidenhead SL6 7LA
Certificate of lawfulness to determine whether the proposed single storey side extension, 3no. front rooflights, 1no. rear dormer and hip to gable following the demolition of the existing detached garage and outbuilding is lawful.
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.
-
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.
-
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.
-
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.