Timber House Hills Lane Cookham Maidenhead SL6 9NX

1. 16 Dec 2025

   Received by Windsor and Maidenhead

2. 17 Dec 2025

   Validated

   Checked as complete and ready for consideration.

3. 5 Jan 2026

   Decision issued: Refuse

4. 11 Aug 2026

   Added to PlanIndex

Windsor and Maidenhead refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

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.

• Elm Cottage Hills Lane Cookham Maidenhead SL6 9NX

  23/00969/CPD Submitted 18 Apr 2023 50 yards away

  Certificate of lawfulness to determine whether the proposed replacement greenhouse is lawful.

  Refused Lawful development 11 docs

• Elm Cottage Hills Lane Cookham Maidenhead SL6 9NX

  26/00229/FULL Submitted 27 Jan 2026 50 yards away

  Alteration to the main roof, side wall, chimney, bay window and fenestration following demolition of existing internal elements, to the cottage ancillary the main dwellinghouse.

  Granted Full applications Demolition Windows or glazing 28 docs
  Domestic

• Hope Cottage Hills Lane Cookham Maidenhead SL6 9NX

  20/01279/TCA Submitted 3 Jun 2020 50 yards away

  (G1) x2 Silver Birch - fell.

  Granted Trees 6 docs

• Merlins Hills Lane Cookham Maidenhead SL6 9NX

  20/02543/FULL Submitted 29 Sep 2020 100 yards away

  Repaving and enlargement of an existing raised patio and the replacement/erection of associated retaining walls - retrospective.

  Granted Full applications 14 docs

• Merlins Hills Lane Cookham Maidenhead SL6 9NX

  20/03201/CPD Submitted 30 Nov 2020 100 yards away

  Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

  Granted Lawful development 13 docs

• Hardings Cottage Hills Lane Cookham Maidenhead SL6 9NX

  23/01994/CPD Submitted 15 Aug 2023 100 yards away

  Certificate of lawfulness to determine whether the single storey rear extension and 2no. new rear dormers following demolition of existing elements is lawful.

  Withdrawn Lawful development Extension Loft or dormer +1 11 docs
  Small domestic

• 26/02222/CPD Refused

  52 Audley Way Ascot SL5 8EF

  Certificate of lawfulness to determine whether the proposed single storey rear extension following the removal of the existing conservatory is lawful.

  Received 8 Sep, published by the council 24 Sep 2026 Lawful development
• 26/01954/CPD Withdrawn

  Mulberry House Waltham Road Maidenhead SL6 3NH

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

  Received 7 Aug, published by the council 16 Aug 2026 Lawful development
• 26/01856/CLU Granted

  Apple Tree Cottage And Land Adjacent To Apple Tree Cottage Paley Street Maidenhead

  Certificate of lawfulness to determine whether the existing use of the land as a residential garden incidental to the main dwelling is lawful

  Received 28 Jul, published by the council 24 Aug 2026 Lawful development
• 26/02022/CPD Refused

  14 Church View White Waltham Maidenhead SL6 3JQ

  Certificate of lawfulness to determine whether the proposed 1no. rear dormer and alterations to fenestration are lawful

  Received 17 Aug, published by the council 2 Sep 2026 Lawful development
• 26/01862/CLU Granted

  Holyport Pre School Holyport Youth Club Moneyrow Green Holyport Maidenhead SL6 2NA

  Certificate of lawfulness to determine whether the existing use of the site as a pre-school is lawful.

  Received 29 Jul, published by the council 4 Aug 2026 Lawful development