15 Parkside Road Sunningdale Ascot SL5 0NL

1. 18 Oct 2021

   Received by Windsor and Maidenhead

2. 13 Dec 2021

   Decision issued: Permitted Development

3. 16 Aug 2026

   Added to PlanIndex

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.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• 15 Parkside Road Sunningdale Ascot SL5 0NL

  21/03106/FULL Submitted 18 Oct 2021 3m away

  Single storey side/rear extension.

  Granted Full applications Extension 10 docs
  Small domestic

• 17 Parkside Road Sunningdale Ascot SL5 0NL

  26/00337/CONDIT Submitted 9 Feb 2026 6m away

  Details required by Condition 1 (Obscure Glazing Scheme) and 2 (Timber Wall Scheme) of planning permission 25/02011/FULL (Allowed on Appeal) for 1no. outbuilding ancillary to the main dwelling with steps, for ancillary domestic purposes including home office, exercise and leisure use, following demolition of existing outbuilding (retrospective).

  Granted Conditions Demolition Windows or glazing 9 docs
  Small domestic

• 7 Parkside Road Sunningdale Ascot SL5 0NL

  22/02846/FULL Submitted 19 Oct 2022 25m away

  Part hip to gable to facilitate a loft conversion and alterations to fenestration.

  Refused Full applications Loft or dormer Windows or glazing 12 docs

• 7 Parkside Road Sunningdale Ascot SL5 0NL

  22/01384/FULL Submitted 19 May 2022 25m away

  x2 new front rooflights, hip to gable and second floor rear extension to facilitate a loft conversion.

  Refused Full applications Extension Loft or dormer 13 docs

• 1 Sidbury Close Ascot SL5 0PD

  21/01968/FULL Submitted 28 Jun 2021 48m away

  Single storey front extension with integral garage.

  Granted Full applications Extension 12 docs
  Small domestic

• 1 Sidbury Close Ascot SL5 0PD

  21/03252/FULL Submitted 2 Nov 2021 49m away

  First floor front extension and x1 new window to existing side elevation.

  Granted Full applications Extension Windows or glazing 12 docs

• 26/01615/CLU Granted

  Riding Court Farm Riding Court Riding Court Road Datchet Slough SL3 9JT

  Certificate of lawfulness to determine whether the existing units 'JKL' (use class B8) used for storage and distribution; unit 'AB' (use class B8) used for hiring, maintaining, and cleaning concrete screed and machinery and 'storage yard 2' (use class B8) used for the storage of scaffolding is lawful.

  1 Jul 2026 Lawful development
• 26/01581/CLD Granted

  The George Public House The Brewhouse The Green Holyport Road Holyport Maidenhead

  Certificate of lawfulness to determine whether the existing bollard is lawful.

  26 Jun 2026 Lawful development
• 26/01389/CLD Granted

  Redwood 88 Bolton Road Windsor SL4 3JG

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

  5 Jun 2026 Lawful development
• 26/02060/CPD Awaiting decision

  13 Orchard Grove Maidenhead SL6 6DR

  Certificate of lawfulness to determine whether the proposed hip to gable roof alteration, 2 no. front rooflights and 1 no. rear dormer is lawful.

  20 Aug 2026 Lawful development
• 26/01564/CPD Refused

  Long Chase Farm Ascot Road Holyport Maidenhead SL6 3LA

  Rear two storey extension to Long Chase Farmhouse under Class A of Part 1 of the GPDO 2015,As Amended.

  25 Jun 2026 Lawful development