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Planning application

22/02223/CPD

Trimstone Hermitage Lane Windsor SL4 4AZ

Refused Windsor and Maidenhead Cert of Lawfulness of Proposed Dev

Proposal

Certificate of lawfulness to determine whether the proposed 3no. rear dormers and 10no. rooflights to facilitate a loft conversion is lawful.

As published by the council, reference 22/02223/CPD

Timeline

Dates from the published record

  1. 15 Aug 2022

    Received by Windsor and Maidenhead

  2. 20 Oct 2022

    Decision issued: Refuse

  3. 27 Jul 2026

    Added to PlanIndex

What refusal means

The process from here

The council refused this application for the reasons set out on the decision notice, which the council portal holds in full. Only the applicant can appeal a refusal; the time limit runs from the decision date and is shorter for householder schemes.

Refusal does not prevent a fresh attempt. Applicants often address the reasons for refusal and resubmit, so a refused scheme is not necessarily the end of proposals for the site.

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

  • 26/01296/FULL Awaiting decision

    Saffrons 8 Winkfield Road Windsor SL4 4BG

    Replacement front canopy, 1no. front dormer, enlargement of the existing rear dormer, alterations to external finishes and to fenestration following demolition of existing carport.

    26 May 2026 160m away Full applications
  • 26/01268/FULL Awaiting decision

    Upton Lodge 12 Winkfield Road Windsor SL4 4BG

    New front porch with relocated front door, single storey side extension, raising of the ridge and eaves to facilitate a loft conversion, new roof with 1 no. chimney, alterations to external finish and fenestration to include 6 no. rooflights, 1 no. EV point.

    20 May 2026 197m away Full applications
  • 22/03206/FULL Granted

    15 Clewer Hill Road Windsor SL4 4BU

    Single storey side/rear extension, raising of the ridge to create accommodation within the roofspace, x1 right side dormer and alterations to external finish and fenestration.

    30 Nov 2022 272m away Full applications
  • 22/03132/FULL Withdrawn

    Dale House 18 Winkfield Road Windsor SL4 4BG

    Installation of a noise-reducing wood fence on the inside edge of the front hedge.

    22 Nov 2022 321m away Full applications
  • 26/01431/CPD Awaiting decision

    363 St Leonards Road Windsor SL4 3DS

    Certificate of lawfulness to determine whether the proposed 1no. front rooflight, 1no. L-shaped rear dormer with 1no. Juliet balcony and alterations to fenestration are lawful.

    10 Jun 2026 324m away Lawful development
  • 22/03064/FULL Granted

    31 Clewer Hill Road Windsor SL4 4BU

    Single storey side extension and alterations to fenestration.

    16 Nov 2022 355m away Full applications

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