Welsh Slate Museum, Gilfach Ddu, Llanberis, Caernarfon, Gwynedd, LL55 4TY

1. 20 Oct 2025

   Received by Gwynedd

2. 6 Aug 2026

   Added to PlanIndex

The council has decided this application; the published outcome sits in the record above and the decision notice on the council portal carries the detail, including any conditions.

If permission was granted, work must normally begin within five years of the decision. If it was refused, the applicant can appeal within the statutory time limit or submit a revised scheme.

This type of application deals with conditions attached to an existing permission, either by supplying the details a condition requires, called discharging it, or by asking to vary or remove one. It does not reopen the principle of the permission itself. Building often cannot lawfully start, or continue past a set stage, until the named conditions are discharged.

More on conditions applications in our guide

• Padarn Country Park, Llanberis, Caernarfon, Gwynedd, LL55 4TY

  C26/0062/18/RA Submitted 2 Feb 2026 0m away

  Rhyddhau amod rhif 4 ar ganiatad rhif C24/0309/18/LL er cytuno gorffeniad allanol yr estyniad / Discharge condition no 4 on consent ref C24/0309/18/LL to agree external finish of extension

  Decided Conditions Extension

• Amgueddfa Cymru, Llanberis, LL55 4TY

  C26/0345/18/LL Submitted 9 Jun 2026 0m away

  Decision due ~4 Aug

  Gwaith ail-caddio'r lifft presennol a gwaith adfer i'r grisiau cysylltiedig a gwaith tirlunio / Re-cladding works to the existing lift and refurbishment works to the associated staircase and landscaping works

  Status unknown Full applications

• Coach House, Royal Victoria Hotel,, Llanberis, LL55 4TY

  C25/0800/15/CR Submitted 30 Oct 2025 0m away

  Tynnu grisiau presennol ac ail-osod grisiau mewnol ynghyd ag newidiadau i'r fynedfa / Remove the existing staircase and site new ones and alterations to the entrance

  Granted Heritage and listed buildings

• Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY

  C26/0303/18/AC Submitted 18 May 2026 0m away

  Decision due ~13 Jul

  Diwygio amod rhif 2 (unol a'r cynlluniau) ar caniatad C24/0977/18/LL i godi uchder to y caffi, gwaith tirlunio a materion draenio / Amend condition number 2 (as per plans) on consent C24/0977/18/LL to increase roof height of cafe, landscaping and drainage matters

  Status unknown Amendments

• Plot Of Land Near The Railway, PADARN COUNTRY PARK, Llanberis, Gwynedd, LL55 4TY

  C26/0299/18/LL Submitted 15 May 2026 0m away

  Decision due ~10 Jul

  Ail-leoli mannau parcio o flaen Amgueddfa Lechi Cymru i leoedd parcio newydd yng nghornel ogledd-orllewinol maes parcio Parc Padarn yn Gilfach Ddu. Relocation of parking from in front of the National Slate Museum to new parking bays in the northwest corner of the Parc Padarn car park at Gilfach Ddu.

  Status unknown Full applications

• First Hydro Co, DINORWIG POWER STATION, Llanberis, Caernarfon, Gwynedd, LL55 4TY

  C25/0659/18/LL Submitted 15 Sep 2025 0m away

  Estyniad i'r Porthdy Diogelwch presennol Extension to existing Security Gatehouse

  Granted Full applications Extension

• C26/0385/09/RA Status unknown

  TREFRI Brynhyfryd Road, Tywyn, Gwynedd, LL36 9HG

  Cais i rhyddhau Amod 6(Cynllun Tirlunio a phlannu coed) o ganiatad cynllunio C24/1027/09/LL / Application to release Condition 6 (Landscaping and tree planting scheme) from planning permission C24/1027/09/LL

  27 Jun 2026 Conditions
• C26/0379/39/RA Status unknown

  FFERM SARN Lôn Sarn Bach, Sarn Bach, Pwllheli, Gwynedd, LL53 7BG

  Cais i rhyddhau amodau (2), (3) a (4) o ganiatad cynllunio C25/0777/39/LL yn ymwneud a (2) ( (Arolwg ffotograffig) (3) lliw llechi (4) gorffeniad allanol. Application to discharge conditons (2), (3) and (4) of planning permission C25/0777/39/LL in relation to (2) photographic survey (3) colour of slate (4) external finishes.

  25 Jun 2026 Conditions
• C26/0375/30/RA Status unknown

  Tir Ger / Land By Horeb, Lon Uwchmynydd, Aberdaron, Pwllheli, LL53 8BY

  Cais i rhyddhau amodau ar ganiatâd cynllunio - C24/0840/30/LL, yn benodol amod (3) yn ymwneud a darparu manylion goleuo. Application to discharge conditions on planning approval- C24/0840/30/LL , namely condition (3) - in relation to submitting lighting details.

  24 Jun 2026 Conditions
• C26/0374/42/RA Status unknown

  Tŷ Gwyn, 2, CLIFF BUNGALOWS Y Lôn Gam, Nefyn, Pwllheli, Gwynedd, LL53 6ED

  Cais ar gyfer rhyddhau amodau ( 3) a (7) o ganiatâd cynllunio C25/0398/42/LL sy'n ymwneud a (3) Gorffeniadau Allanol a (7) cyflwyno Cynllun Rheoli Adeiladu . Application to discharge conditions (3) and (7) of planning permission C25/0398/42/LL in relation to (3) External Finishes and (7) the submission of a Construction Management Plan

  23 Jun 2026 Conditions
• C26/0363/35/RA Status unknown

  SIBRWD Y GWYNT Morannedd, Criccieth, Gwynedd, LL52 0PP

  Cais i rhyddhau amod 6(manylion dwr budur) o ganiatad cynllunio C20/0040/35/LL / Application to discharge condition 6(foul drainage details) o gais cynllunio C20/0040/35/LL

  18 Jun 2026 Conditions