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Planning application

21/01790/CPD

156 Straight Road Old Windsor Windsor SL4 2SG

Granted Windsor and Maidenhead Cert of Lawfulness of Proposed Dev

Proposal

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

As published by the council, reference 21/01790/CPD

Timeline

Dates from the published record

  1. 10 Jun 2021

    Received by Windsor and Maidenhead

  2. 4 Aug 2021

    Decision issued: Permitted Development

  3. 31 Jul 2026

    Added to PlanIndex

What a grant of permission means

The process from here

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.

About lawful development applications

How this application type works

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

Nearby applications

Within 500 metres

  • 21/00531/FULL Withdrawn

    158 Straight Road Old Windsor Windsor SL4 2SG

    Erection of 1 No. dwelling following demolition of existing dwelling and garage

    23 Feb 2021 14m away Full applications
  • 22/02552/FULL Granted

    158A Straight Road Old Windsor Windsor SL4 2SG

    Two storey front extension, two storey side/rear extension, new roof, alterations to fenestration.

    20 Sep 2022 41m away Full applications
  • 23/00300/FULL Granted

    5 The Moorings Straight Road Old Windsor Windsor SL4 2SL

    Wall opened up on the ground floor east elevation, part first, part second floor extension to the east elevation with undercroft, first floor extension to the south elevation, new terrace with glass balustrade to the east and south elevations, 1no. south facing dormer, external staircase, alterations to the external finish and fenestration, new ground floor terrace and steps, boundary treatment and 1no parking space.

    3 Feb 2023 103m away Full applications
  • 22/02293/PDXL Withdrawn

    2 Walpole Road Old Windsor Windsor SL4 2LZ

    Single storey rear extension no greater than 5.62m in depth, 3.60m high with an eaves height of 2.80m.

    19 Aug 2022 148m away Prior approval
  • 23/00200/FULL Granted

    2 Walpole Road Old Windsor Windsor SL4 2LZ

    Single storey rear extension, garage conversion and alterations to fenestration following demolition of existing element.

    24 Jan 2023 150m away Full applications
  • 22/02425/TPO Granted

    13 Keppel Spur Old Windsor Windsor SL4 2LU

    T2 - Ash - removal of dead branches, crown lift to 8m above ground, crown reduction by 2m to nearest growth point, T4 - Oak - removal of dead branches, crown lift to 5.5m above ground, crown reduction by 2m to nearest growth point, branches encroaching on property to be cut back to leave a clearance of 2m (041/2004/TPO)

    2 Sep 2022 174m away Trees

In Windsor and Maidenhead

  • 26/01836/CPD Awaiting decision

    Rivendale 22A Gloucester Drive Wraysbury Staines TW18 4TY

    Certificate of lawfulness to determine whether the proposed conversion of the existing garage into habitable space is lawful.

    27 Jul 2026 Lawful development
  • 26/01528/CPD Granted

    Foxley Manor Forest Green Road Holyport Maidenhead SL6 2NW

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

    22 Jun 2026 Lawful development
  • 26/01532/CPD Granted

    72 Highway Avenue Maidenhead SL6 5AQ

    Certificate of Lawfulness to determine whether the proposed rear dormer roof extension and associated internal alterations to enlarge the existing loft accommodation is lawful.

    22 Jun 2026 Lawful development
  • 26/01823/CPD Awaiting decision

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

    24 Jul 2026 Lawful development
  • 26/01772/CPD Granted

    18 Broken Furlong Eton Windsor SL4 6PD

    Certificate of lawfulness to determine whether the proposed erection of a single storey rear detached annex to be used incidental with the host dwelling is lawful.

    20 Jul 2026 Lawful development