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Planning application

26/00886/FULL

Coppertops Mill Lane Horton Slough SL3 9PN

Granted Windsor and Maidenhead Full

Proposal

Single storey rear extension and first floor rear/side extension following demolition of existing conservatory.

As published by the council, reference 26/00886/FULL

Timeline

Dates from the published record

  1. 8 Apr 2026

    Received by Windsor and Maidenhead

  2. 21 Apr 2026

    Validated

    Checked as complete and ready for consideration.

  3. 12 Jun 2026

    Decision issued: Application Permitted

  4. 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 full applications applications

How this application type works

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

Nearby applications

Within 500 metres

  • 21/01584/FULL Granted

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  • 26/00609/CPD Granted

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    6 Mar 2026 164m away Lawful development
  • 22/02732/FULL Granted

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    10 Oct 2022 198m away Full applications
  • 22/03081/PDXL Refused

    4 Coppermill Road Wraysbury Staines TW19 5NT

    Single storey rear extension no greater than 8m in depth, 2.70m high with an eaves height of 2.50m.

    16 Nov 2022 222m away Prior approval
  • 23/00269/FULL Refused

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    7 Feb 2023 255m away Full applications
  • 22/03018/FULL Granted

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    New first floor with undercoft, raising of the ridge and alterations to fenestration following the demolition of the existing first floor element.

    11 Nov 2022 263m away Full applications

In Windsor and Maidenhead

  • 26/00962/FULL Granted

    Bonnicut Barn Bonnicut Court 14 High Street Sunningdale Ascot SL5 0NB

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    20 Apr 2026 Full applications
  • 26/01310/FULL Granted

    6 Gilman Crescent Windsor SL4 4YN

    Single storey front/side extension, relocated front door, two storey rear extension, alterations to fenestration and hardstanding, new steps, 1 no. dropped kerb, following demolition of existing elements

    22 May 2026 Full applications
  • 25/03313/FULL Refused

    Land To The South of Lower Mount Farm Long Lane Cookham Maidenhead

    Erection of a crematorium with ceremony hall and memorial arboretum, associated use of land, PV array, vehicular access, parking, landscaping, pavement and road widening along Long Lane.

    15 Dec 2025 Full applications
  • 26/01387/FULL Granted

    7 Elm Road Windsor SL4 3NB

    Single storey rear/side extension

    5 Jun 2026 Full applications
  • 26/00877/FULL Granted

    45 Queens Close Old Windsor Windsor SL4 2PR

    Two storey front/side extension.

    7 Apr 2026 Full applications