Hotel Port Dinorwic, PLAS DINORWIC Ffordd Siabod, Y Felinheli, Gwynedd, LL56 4XA

1. 18 Aug 2025

   Received by Gwynedd

2. 6 Aug 2026

   Added to PlanIndex

Gwynedd refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. 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.

• Rear Of Porth Y Llechen, Y Felinheli, LL56 4JG

  C25/0627/20/CC Submitted 8 Sep 2025 150 yards away

  Decision due ~3 Nov

  Gwaith i goed sy'n destun Gorchymyn Diogelu Coed. Work to trees protected by a Tree Preservation Order.

  Status unknown Trees

• Land To The Front Of Yr Heulyn, Hen Gei Llechi, Felinheli, LL56 4JN

  C26/0195/20/LL Submitted 27 Mar 2026 150 yards away

  Decision due ~22 May

  Codi deildy arfaethedig i greu ardal eistedd dan do dros yr ardal eistedd / adloniant bresennol Proposed erection of pergola to create covered sitting area over existing seating / entertainment area

  Status unknown Full applications

• 29 Hen Gei Llechi, Y Felinheli, Gwynedd, LL56 4PB

  C26/0100/20/DT Submitted 12 Feb 2026 0.3 miles away

  Gosod Pwmp Gwres Vaillant ar wal ochr yr annedd. Installation of a Vaillant Heat Pump on the side wall of the dwelling.

  Decided Householder
  Domestic

• C26/0348/41/TC Decided

  Ynys Gain Bach, YNYS GAIN, Llanystumdwy, Criccieth, Gwynedd, LL52 0SA

  Cais am Dystysgrif Datblygiad Cyfreithlon ar gyfer defnydd llety gwyliau tymor byr (C6) / Application for a Certificate of Lawful Development for use as short-term lets (C6)

  Received 9 Jun, published by the council 6 Aug 2026 Lawful development
• C26/0295/20/TC Status unknown

  CROESOR Tan Y Maes, Y Felinheli, Gwynedd, LL56 4UQ

  Lleoli catref symudol at defnydd ategol i'r prif dy annedd. Siting of a mobile home for ancillary use to the main dwellinghouse.

  Received 12 May, published by the council 6 Aug 2026 Lawful development
• C26/0250/09/TC Status unknown

  OLD BAKERY COTTAGE High Street, Tywyn, Gwynedd, LL36 9AE

  Cais am Dystysgrif Datblygiad Cyfreithlon ar gyfer Defnydd presennol cyn Fecws yn dy annedd (Dosbarth Defnydd C3) Application for a Lawful Development Certificate for the existing use of a former Bakery as a dwelling house (C3 Use Class)

  Received 20 Apr, published by the council 6 Aug 2026 Lawful development
• C26/0229/17/TC Status unknown

  FFERM FRON DIRION GANOL, Cilgwyn, Caernarfon, Gwynedd, LL54 7SE

  Tystysgrif Datblygiad Cyfreithlon ar gyfer gosod tyrbin gwynt arunig o fewn cwrtil tŷ annedd. Lawful Development Certificate for the proposed installation of a stand alone wind turbine within the curtilage of a dwellinghouse.

  Received 9 Apr, published by the council 6 Aug 2026 Lawful development
• C26/0211/25/TC Status unknown

  Nyth Bach, Tyddyn Hir, Caerhun, Bangor, Gwynedd, LL57 4DU

  Cais am Dystysgrif Datblygiad Cyfreithlon ar gyfer defnydd anecs Nyth Bach, Caerhun, Bangor, LL57 4DU fel uned preswyl ar wahân (C3) am gyfnod parhaus a di-dor o 10 mlynedd, yn groes I gofynion amod 2 o ganiatâd Cynllunio C10A/0112/25/LL Application for a Lawful Development Certificate for the use of the annex known as Nyth Bach, Caerhun, Bangor, LL57 4DU as a separate residential unit (C3) for a continuous and uninterrupted period of 10 years, contrary to the requirements of condition 2 of planning permission C10A/0112/25/LL

  Received 1 Apr, published by the council 6 Aug 2026 Lawful development