1 Grange Lane Cookham Maidenhead SL6 9RP

This site has had 6 applications since 2024: 3 approved, 3 refused.

• 26/01067/PDXL Refused

  1 Grange Lane Cookham Maidenhead SL6 9RP

  1no. single storey rear extension and 1no. single storey side/rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

  Decided 29 May 2026 Prior approval
• 26/00634/PDXL Refused

  1 Grange Lane Cookham Maidenhead SL6 9RP

  2no. single storey side/rear extensions no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m following demolition of existing garage.

  Decided 22 Apr 2026 Prior approval
• 26/00633/CPD Granted

  1 Grange Lane Cookham Maidenhead SL6 9RP

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

  Decided 18 Mar 2026 Lawful development
• 26/00632/PDXL Granted

  1 Grange Lane Cookham Maidenhead SL6 9RP

  Single storey rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

  Decided 20 Apr 2026 Prior approval
• 24/03027/PDXL Refused

  1 Grange Lane Cookham Maidenhead SL6 9RP

  Single storey side/rear extension no greater than 8m in depth, 3.5m high with an eaves height of 2.8m.

  Decided 24 Jan 2025 Prior approval

1. 3 Aug 2026

   Received by Windsor and Maidenhead

2. 11 Aug 2026

   Added to PlanIndex

3. 3 Sep 2026

   Decision issued: Prior Approval Not Required

Windsor and Maidenhead granted permission on 3 September 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

• 1 Grange Lane Cookham Maidenhead SL6 9RP

  24/03027/PDXL Submitted 9 Dec 2024 50 yards away

  Single storey side/rear extension no greater than 8m in depth, 3.5m high with an eaves height of 2.8m.

  Refused Prior approval Extension 9 docs
  Small domestic

• 1 Grange Lane Cookham Maidenhead SL6 9RP

  26/00633/CPD Submitted 10 Mar 2026 50 yards away

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

  Granted Lawful development Extension 10 docs

• 1 Grange Lane Cookham Maidenhead SL6 9RP

  26/01067/PDXL Submitted 30 Apr 2026 50 yards away

  1no. single storey rear extension and 1no. single storey side/rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

  Refused Prior approval Extension 11 docs
  Small domestic

• 1 Grange Lane Cookham Maidenhead SL6 9RP

  26/00634/PDXL Submitted 10 Mar 2026 50 yards away

  2no. single storey side/rear extensions no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m following demolition of existing garage.

  Refused Prior approval Extension Demolition 11 docs
  Small domestic

• 1 Grange Lane Cookham Maidenhead SL6 9RP

  26/00632/PDXL Submitted 10 Mar 2026 50 yards away

  Single storey rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

  Granted Prior approval Extension 11 docs
  Small domestic

• 2 Grange Lane Cookham Maidenhead SL6 9RP

  26/00982/CPD Submitted 21 Apr 2026 50 yards away

  Certificate of lawfulness to determine whether the proposed replacement front porch, two storey rear extension, single storey side extension, 1no. rear Juliet balcony and alterations to fenestration following demolition of existing front porch and garage are lawful.

  Granted Lawful development Extension Demolition +1 16 docs
  Small domestic

• 26/02170/PDXL Granted

  15 Cell Farm Avenue Old Windsor Windsor SL4 2PD

  Single storey rear extension no greater than 5.00m in depth, 2.85m high with an eaves height of 2.85m following demolition of the existing elements.

  Received 3 Sep, published by the council 12 Sep 2026 Prior approval
• 26/02445/PDXL Awaiting decision

  Mulberry House Waltham Road Maidenhead SL6 3NH

  Single storey rear extension no greater than 7.88m in depth, 3.50m high with an eaves height of 3.00m.

  Received 7 Oct, published by the council 9 Oct 2026 Prior approval
• 26/02001/CLAMA Granted

  158 Blackamoor Lane Maidenhead SL6 8RN

  Prior approval for the change of use of the ground floor from Use Class Eg(iii) to form 8 no. x 1 bedroom flats.

  Received 13 Aug, published by the council 24 Aug 2026 Prior approval
• 26/02425/PDXL Awaiting decision

  Eton Manor 60 Eton Road Datchet Slough SL3 9AY

  Single storey rear extension no greater than 6.00m in depth, 3.00m high with an eaves height of 2.75m.

  Received 5 Oct, published by the council 9 Oct 2026 Prior approval
• 26/02007/PDXL Refused

  18 Bradshaw Close Windsor SL4 5PS

  Single storey rear extension no greater than 3.60m in depth, 3.77m high with an eaves height of 2.43m.

  Received 13 Aug, published by the council 24 Aug 2026 Prior approval