Winterdown And Land To The Rear of Winterdown Stone House Lane Cookham Maidenhead SL6 9TP

1. 25 Aug 2026

   Received by Windsor and Maidenhead

2. 1 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 12 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 27 October 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.

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.

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.

• Winterdown Stone House Lane Cookham Maidenhead SL6 9TP

  26/00442/CPD Submitted 18 Feb 2026 1m away

  Certificate of lawfulness to determine whether the proposed 2no. outbuildings incidental to the main dwelling, rear terrace, rear patio with hot tub, new pond to replace existing swimming pool, hardstanding and landscaping are lawful.

  Refused Lawful development 8 docs
  Domestic

• Winterdown Stone House Lane Cookham Maidenhead SL6 9TP

  26/01283/FULL Submitted 22 May 2026 1m away

  Erection of a replacement garden shed

  Withdrawn Full applications 19 docs
  Small domestic

• River Thames House Stone House Lane Cookham Maidenhead SL6 9TP

  25/03154/TCA Submitted 26 Nov 2025 68m away

  (T2) Ash - deadwood and (T3) Ash - deadwood.

  Withdrawn Trees 10 docs

• Stone House Stone House Lane Cookham Maidenhead SL6 9TP

  23/00567/TCA Submitted 6 Mar 2023 73m away

  T1 - Oak - Crown reduce leaving 17m height and 15m spread, applying retrenchment pruning principles. T2 - Holly - Fell.

  Granted Trees 11 docs

• The Bower Stone House Lane Cookham Maidenhead SL6 9TP

  23/01340/FULL Submitted 1 Jun 2023 73m away

  Garage conversion into habitable accommodation, raising of the ridge and extension of the existing link extension, new and alterations to existing steps, relocation of the pedestrian and vehicular access and alterations to fenestration following part demolition of existing side element.

  Granted Full applications Extension Demolition +1 20 docs

• River Thames House Stone House Lane Cookham Maidenhead SL6 9TP

  25/03127/TPO Submitted 26 Nov 2025 75m away

  (T1) Weeping willow - crown lift the skirt to provide a ground clearance of up to 2m. (014/1971/TPO).

  Granted Trees 11 docs

• 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
• 26/02230/CPD Awaiting decision

  15 Castle Avenue Datchet Slough SL3 9BA

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

  9 Sep 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