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Planning application

23/00299/FULL

Grasmere School Lane Cookham Maidenhead SL6 9QJ

Granted Windsor and Maidenhead Full

Proposal

Single storey rear/side extension following demolition of existing

As published by the council, reference 23/00299/FULL

Timeline

Dates from the published record

  1. 3 Feb 2023

    Received by Windsor and Maidenhead

  2. 30 Mar 2023

    Decision issued: Application Permitted

  3. 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 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

  • 24/02341/CONDIT Granted

    The Maltings High Street Cookham Maidenhead SL6 9SL

    Details required by Condition 2 (Biodiversity Enhancements) and Condition 4 (External Materials) of planning permission 23/03076/FULL for a replacement single storey infill extension with new lantern rooflight, replacement tiles to front bay window and bricks to top section of chimney at rear, repairs to windows on side elevation and to front gate pier.

    27 Sep 2024 42m away Conditions
  • 24/02342/CONDIT Granted

    The Maltings High Street Cookham Maidenhead SL6 9SL

    Details required by Conditions 3 (Method Statement), 4 (Glazing etc), 5 (Rainwater Goods), 6 (Lead Codes), 7 (Brickwork), 8 (Bedding/Jointing/Pointing) and 9 (New Studwork) of listed building consent 23/03077/LBC for Consent for internal alterations, replacement single storey infill extension with new lantern rooflight, replacement tiles to front bay window and bricks to top section of chimney at rear, repairs to windows and 1no. solid fan light over existing door on side elevation and repairs to front gate pier.

    26 Sep 2024 42m away Conditions
  • 23/00381/TCA Granted

    The Maltings High Street Cookham Maidenhead SL6 9SL

    T1 - Holm Oak - Crown reduce by 1.5-2m, leaving a height of 9m and spread of 8m, reduce overhanging branches on boundary by 1-2m and remove deadwood. T2 - Bay Tree - Crown reduce leaving a height of 4m, spread of 1.5m from main stem and provide 0.5m clearance from property. T3 - Bay Tree - Crown reduce leaving a height of 4m, spread of 1.5m from main stem and provide 0.5m clearance from property. T4 - Yew Tree - Sever ivy, remove deadwood, crown clean and reduce by 1m leaving a height and spread of 6m.

    10 Feb 2023 50m away Trees
  • 26/00161/TCA Granted

    Gantry House School Lane Cookham Maidenhead SL6 9QN

    Fig tree - crown reduce by 2m to leave a height of 6m and spread of 6m.

    19 Jan 2026 63m away Trees
  • 23/00035/TCA Granted

    The Moor Moor Hall Chartered Institute of Marketing School Lane Cookham Maidenhead SL6 9QH

    T877 - Sycamore - Crown reduce back to previous, leaving a spread of 10m. T878 & T879 - x2 Coke Cherry - Crown reduce back to previous, leaving a spread of 3-3.5m. T880 - Lawson Cypress - Reduction in height leaving height of 6m. T883 - Lawson Cypress - Crown lift over footpath to legal height (2.5m) and provide 3m clearance over adjacent building.

    6 Jan 2023 64m away Trees
  • 22/02739/TCA Granted

    The Moor Moor Hall Chartered Institute of Marketing School Lane Cookham Maidenhead SL6 9QH

    T884 - Common Ash - fell. T881 - Lawson Cypress - fell. T888 - Horse Chestnut - Crown reduction to historical pruning points

    10 Oct 2022 66m away Trees

In Windsor and Maidenhead

  • 26/00962/FULL Granted

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

    2no. front dormers, part raising of the front elevation to form a parapet wall and terrace, 3no. front rooflights, 3no. rear dormers and alterations to fenestration. (Part Retrospective).

    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