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Planning application

PL/26/00309/SA

59 Siddington Drive Aylesbury Buckinghamshire HP18 0UE

Granted Buckinghamshire Certificate of Lawful Use - Proposed

Proposal

Certificate of lawfulness for proposed loft conversion

As published by the council, reference PL/26/00309/SA

Timeline

Dates from the published record

  1. 15 Jan 2026

    Received by Buckinghamshire

  2. 27 Feb 2026

    Decision issued: Cert of Law PROPOSED-granted

  3. 27 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

  • PL/25/6785/CONDA Awaiting decision

    Berryfields Local Centre Concorde Square Aylesbury HP18 0PT

    Application for approval of details subject to condition 3 (planting scheme) of planning approval 25/01481/APP

    24 Dec 2025 388m away Conditions
  • PL/25/6458/NMA Decided

    7 Lakeland Drive Aylesbury Buckinghamshire HP18 0ZU

    Proposed non-material amendment to permission for (Householder application for single storey rear extension and garden office) granted under householder planning reference 25/01899/APP to allow for changes to roof light sizes, Bi-Fold doors to set of French Doors and under condition 5 change garage to garden office.

    16 Dec 2025 484m away Amendments

In Buckinghamshire

  • PL/26/05515/SA Awaiting decision

    Dinton Hall Upton Road Dinton Buckinghamshire HP17 8UQ

    Certificate of lawfulness application for proposed crossover field access point.

    21 Jul 2026 Lawful development
  • PL/26/05843/SA Awaiting decision

    Land at Springfield Farm, South Heath, Buckinghamshire

    Certificate of Proposed Lawful Development for the temporary storage of soil stockpiles at Springfield Farm field at South Heath, Buckinghamshire

    21 Jul 2026 Lawful development
  • PL/26/05740/SA Awaiting decision

    St Martins Grimms Hill Great Missenden Buckinghamshire HP16 9BG

    Certificate of lawfulness for proposed installation of solar panels on rear roof face.

    17 Jul 2026 Lawful development
  • PL/26/05697/SA Awaiting decision

    Esterllita Green End Road Radnage Buckinghamshire HP14 4BY

    Certificate of lawfulness for proposed 2 x detached buildings to provide a home office, games room, gym, garden store & associated W.C facilities

    16 Jul 2026 Lawful development
  • PL/26/05233/EU Awaiting decision

    15 Criss Grove Chalfont St Peter Buckinghamshire SL9 9HG

    Certificate of lawfulness for existing erection of a rear dormer roof extension to facilitate a loft conversion

    16 Jul 2026 Lawful development