Planning application
Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Gosod isbwerdy drydan a chyfansoddyn storio sgip gwastraff ynghyd â’r gwaith cysylltiedig / Installation of an electric sub-station and waste skip store compound and associated works
As published by the council, reference C26/0139/18/LL
Application record
- Reference
- C26/0139/18/LL
- Type
- Full Planning
- Received
- 2 Mar 2026
- Ward
- Deiniolen
- Postcode
- LL55 4TY
Site history
Applications at this address on the Gwynedd register
This site has had 5 applications since 2025: 1 approved, 0 refused.
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C26/0303/18/AC Status unknown
Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY
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
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C25/0937/18/CR Granted
Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY
Addasiadau i rhan G38 (gweithdy haearn), G39 (gweithdy cyffredinol) a F01 (gofod arddangosfa) o'r Amgueddfa / Alterations to Metal Workshop (G38), General Workshop (G39) and Temporary Exhibition Space (F01)
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C25/0897/18/AC Decided
Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY
Diwygio amod rhif 2 (unol a'r cynlluniau) o gais rhif C24/0976/18/CR i ddiwygio'r dyluniad mewn lleoliadau/ Amend condition 2 (as per plans) on consent no C24/0976/18/CR to vary design in places
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C25/0767/18/RA Decided
Welsh Slate Museum, Gilfach Ddu, Llanberis, Caernarfon, Gwynedd, LL55 4TY
Rhyddhau amod 5 (cyflwyno samplau morter) ar ganiatad rhif C24/0977/18/LL ac C24/0976/18/CR / Discharge condition 5 (submit mortar samples) on consent refs C24/0977/18/LL and C24/0976/18/CR
Timeline
Dates from the published record
-
2 Mar 2026
Received by Gwynedd
-
6 Aug 2026
Added to PlanIndex
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Decision
Awaiting decision
Decision expected by 27 April 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Checking the current position
The published feed does not show a live status for this application; the register on Gwynedd's own portal holds the authoritative version.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
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Padarn Country Park, Llanberis, Caernarfon, Gwynedd, LL55 4TY
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
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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
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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
Rhyddhau amod 5 (cyflwyno samplau morter) ar ganiatad rhif C24/0977/18/LL ac C24/0976/18/CR / Discharge condition 5 (submit mortar samples) on consent refs C24/0977/18/LL and C24/0976/18/CR
Decided Conditions -
Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY
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
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.
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