15 The Avenue Old Windsor Windsor SL4 2RS

1. 4 Feb 2026

   Received by Windsor and Maidenhead

2. 17 Feb 2026

   Decision issued: Permitted Development

3. 25 Jul 2026

   Added to PlanIndex

Windsor and Maidenhead granted permission on 17 February 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.

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.

• 14 The Avenue Old Windsor Windsor SL4 2RS

  22/01794/FULL Submitted 4 Jul 2022 50 yards away

  Part single part two storey side/rear extension and hip to gable loft conversion with x2 front rooflights and x1 rear dormer.

  Refused Full applications Extension Loft or dormer 9 docs

• 17 The Avenue Old Windsor Windsor SL4 2RS

  22/03322/CPD Submitted 14 Dec 2022 50 yards away

  Certificate of lawfulness to determine whether the loft conversion into habitable accommodation and x1 rear dormer is lawful.

  Granted Lawful development Loft or dormer 7 docs

• 17 The Avenue Old Windsor Windsor SL4 2RS

  22/03324/PDXL Submitted 14 Dec 2022 50 yards away

  Single storey rear extension no greater than 5.00m in depth, 3.65m high with an eaves height of 2.62m.

  Granted Prior approval Extension 8 docs
  Small domestic

• 18 The Avenue Old Windsor Windsor SL4 2RS

  21/01334/CPD Submitted 30 Apr 2021 50 yards away

  Certificate of lawfulness to determine whether the proposed hip to gable, rear dormer and 3 No. front rooflights is lawful.

  Granted Lawful development Loft or dormer 10 docs

• 7 Meadow Way Old Windsor Windsor SL4 2NX

  21/01803/FULL Submitted 10 Jun 2021 50 yards away

  New front porch.

  Granted Full applications Extension 11 docs
  Small domestic

• 9 Meadow Way Old Windsor Windsor SL4 2NX

  21/00358/FULL Submitted 8 Feb 2021 50 yards away

  Formation of rear dormer with balcony to accommodate a loft conversion and x3 rooflights to front elevation.

  Granted Full applications Loft or dormer 9 docs

• 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