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Planning application

21/01149/CPD

18 Stephenson Drive Windsor SL4 5LG

Granted Windsor and Maidenhead Cert of Lawfulness of Proposed Dev

Proposal

Certificate of lawfulness to determine whether the proposed single storey rear extension is lawful.

As published by the council, reference 21/01149/CPD

Timeline

Dates from the published record

  1. 13 Apr 2021

    Received by Windsor and Maidenhead

  2. 4 May 2021

    Validated

    Checked as complete and ready for consideration.

  3. 27 Jul 2021

    Decision issued: Permitted Development

  4. 27 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.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

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In Windsor and Maidenhead

  • 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.

    27 Jul 2026 Lawful development
  • 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.

    22 Jun 2026 Lawful development
  • 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.

    22 Jun 2026 Lawful development
  • 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.

    24 Jul 2026 Lawful development
  • 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.

    20 Jul 2026 Lawful development