Llanidloes Sewage Treatment Works Llanidloes Powys SY18 6LQ

1. 27 Jul 2015

   Received by Powys

2. 7 Aug 2015

   Validated

   Checked as complete and ready for consideration.

3. 17 Sep 2015

   Decision issued: Permitted Development

4. 6 Sep 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 five 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

• LLANIDLOES RFCCAE HAFREN, DOLWEN, LLANIDLOES, SY18 6LQ

  P/26/0914/FUL Submitted 17 Aug 2026 0m away

  88% historically approved · decision due ~21 Oct

  New pitch lighting

  Awaiting decision Full applications 9 docs

• The Gate House Dolwen Llanidloes Powys SY18 6LQ

  P/2009/0894 Submitted 14 Aug 2009 24m away

  Erection of a first floor extension

  Granted Householder Extension 1 doc
  Domestic

• Llwyn Dolwen Llanidloes Powys SY18 6LH

  M/2006/0544 Submitted 12 Apr 2006 334m away

  Reserved matters application for siting, design, access, appearance & landscaping in connection with proposed agricultural worker s dwelling

  Granted Reserved matters
  Domestic

• PT Os 8200 Leylands Holiday Home Park Dolwen Llanidloes SY18 6LQ

  M/2005/1306 Submitted 1 Dec 2005 484m away

  Section 73 application to retain caravan site without complying with conditions attached to previous permissions

  Granted Full applications

• P/26/0523/CLP Granted

  BRYN BANADL, ABERHOSAN, MACHYNLLETH, SY20 8RA

  Section 192 application to obtain a lawful development certificate for the construction of 2 new dormers with addition of a window in the gable end, erection of a porch and removal of chimney.

  8 Jun 2026 Lawful development
• P/26/0492/CLP Granted

  GLYN CANOL, MANAFON, WELSHPOOL, SY21 8BS

  Section 192 application for a Lawful Development Certificate for the erection of single storey side extension

  19 Jun 2026 Lawful development
• P/26/0663/CLP Granted

  NANTYGWARTHEG, TREFEGLWYS, CAERSWS, SY17 5QQ

  Section 192 application for a Lawful Development Certificate for the Erection of a single-storey rear extension

  20 Jul 2026 Lawful development
• P/26/0925/CLP Awaiting decision

  3 Penymaes, Adfa, Newtown, Powys, SY16 3BQ

  Section 192 application for a Lawful Development Certificate for the creation of tarmac driveway providing additional vehicle turning space

  19 Aug 2026 Lawful development
• P/26/0644/CLP Granted

  2 Cwmclyd Cottages, Long Street, Ynys Uchaf, Swansea, SA9 1RL

  Certificate of lawfulness (Section 191) for a proposed single storey extension to rear

  17 Jul 2026 Lawful development