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Planning application

15 Castle Avenue Datchet Slough SL3 9BA

Awaiting decision Windsor and Maidenhead 26/02230/CPD Cert of Lawfulness of Proposed Dev

Works: Extension Small domestic

Read from the description, not a valuation. How we read the register

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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

As published by the council, reference 26/02230/CPD

Application record

Reference
26/02230/CPD
Type
Cert of Lawfulness of Proposed Dev
Status
Awaiting decision
Received
9 Sep 2026
Validated
9 Sep 2026
Ward
Datchet Horton And Wraysbury
Parish
Datchet Parish
Postcode
SL3 9BA

Timeline

Dates from the published record

  1. 9 Sep 2026

    Received by Windsor and Maidenhead

  2. 12 Sep 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 4 November 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Windsor and Maidenhead took a median of 55 days over the applications it decided in the last year.

Documents

Plans, drawings, consultee responses and the officer's report

8 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Trade members open them from here.

Open the documents

What happens while it is decided

This application is with Windsor and Maidenhead for determination, against a statutory target of eight weeks. Over the last year Windsor and Maidenhead decided lawful development applications in a median of 50 days. More in our guide to how long planning decisions take.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 133 Slough Road Datchet Slough SL3 9AE

    22/02312/NMA Submitted 22 Aug 2022 63m away

    Non material amendments to planning permission 21/03671 for amendments to the design of the approved detached garage with room above.

    Refused Amendments 8 docs

  • Land At 16 Castle Avenue Datchet Slough

    21/00211/OUT Submitted 27 Jan 2021 64m away

    Outline application for 1no. three bedroom detached dwelling with all matters reserved.

    Refused Outline New dwelling 21 docs
    Domestic

  • 133 Slough Road Datchet Slough SL3 9AE

    23/01052/FULL Submitted 28 Apr 2023 65m away

    Two storey front/side extension, side canopy, thermal insulation to the existing walls and alterations to the external finish and fenestration following the demolition of the existing garage and store.

    Granted Full applications Extension Demolition +1 21 docs

  • 10 Castle Avenue Datchet Slough SL3 9BA

    22/01288/CPD Submitted 12 May 2022 84m away

    Certificate of lawfulness to determine whether the alterations and extension to first floor roof space are lawful

    Granted Lawful development Extension 10 docs

  • 135 Slough Road Datchet Slough SL3 9AE

    26/00377/FULL Submitted 12 Feb 2026 84m away

    Single storey side extension and alterations to fenestration

    Granted Full applications Extension Windows or glazing 14 docs
    Small domestic

  • 10 Castle Avenue Datchet Slough SL3 9BA

    21/01678/FULL Submitted 1 Jun 2021 87m away

    Single storey side/rear extension, hip to gable with x2 front dormers, x1 rear dormer, x1 new door to side elevation, x1 new rooflight to rear extension and alteration to fenestration.

    Withdrawn Full applications Extension Loft or dormer +1 16 docs
    Small domestic

In Windsor and Maidenhead

  • 26/01553/CLU Granted

    64 Priors Way Maidenhead SL6 2EN

    Certificate of lawfulness to determine whether the existing use of building as self-contained residential dwelling as per details set out in Statutory Declaration is lawful.

    24 Jun 2026 Lawful development
  • 26/01039/CPD Refused

    Touchen End House Ascot Road Holyport Maidenhead SL6 3JY

    Certificate of lawfulness to determine whether the proposed outbuilding following demolition of existing garage is lawful.

    28 Apr 2026 Lawful development
  • 26/02205/CPD Awaiting decision

    15 Warrington Spur Old Windsor Windsor SL4 2NF

    Certificate of lawfulness to determine whether the proposed new driveway is lawful.

    7 Sep 2026 Lawful development
  • 26/01648/CPD Granted

    38 Tilstone Close Eton Wick Windsor SL4 6NG

    Certificate of lawfulness to determine whether the proposed formation of habitable room in roofspace with side dormer, 1 No front and side rooflights, 1 No. rear window and part hip to gable is lawful.

    6 Jul 2026 Lawful development
  • 26/02181/CPD Awaiting decision

    21 Lincoln Road Maidenhead SL6 5HW

    Certificate of lawfulness to determine whether the proposed single storey rear extension and 1no. rear dormer and 1no. rooflight are lawful.

    3 Sep 2026 Lawful development