Planning application
Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY
Decided. The decision notice on the council portal carries the outcome in full, including any conditions.
Proposal
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
As published by the council, reference C25/0897/18/AC
Application record
- Reference
- C25/0897/18/AC
- Type
- Removal/Variation of Condition(s)
- Status
- Conditions
- Decision
- Condition(s) Fully Discharged
- Received
- 2 Dec 2025
- Ward
- Deiniolen
- Parish
- Llanddeiniolen
- 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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C26/0139/18/LL Status unknown
Welsh Slate Museum, GILFACH DDU, Llanberis, Caernarfon, Gwynedd, LL55 4TY
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
-
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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C25/0767/18/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 Dec 2025
Received by Gwynedd
-
6 Aug 2026
Added to PlanIndex
After the decision
Gwynedd has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 500 metres
-
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
Decided Conditions Extension -
Amgueddfa Cymru, Llanberis, LL55 4TY
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
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.
Status unknown Full applications
Other amendment applications
In Gwynedd
-
C26/0349/03/AC Status unknown
1, CASTELL BARLWYD Glanypwll Road, Tanygrisiau, Blaenau Ffestiniog, Gwynedd, LL41 3RH
Cais i ddiwygio amod 2(cynlluniau cymeradwy) i newid dyluniad yr estyniad o ganiatad (C13/0879/03/LL) / Application to amend condition 2 (approved plans) to alter the design of the extension on planning permission (C13/0879/03/LL)
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C26/0337/39/DA Status unknown
LEE BANK Lon Rhoslyn, Abersoch, Pwllheli, Pwllheli, LL53 7BB
Diwygiad ansylweddol i ganiatâd cynllunio C21/0086/39/DT i leihau maint y tŷ cychod, ail leoli drws y garej a newid strwythur y to o fflat i to brig. Non-material amendment to planning permission C21/0086/39/DT to reduce the size of the original boathouse, reposition of the garage door and change roof structure from flat to pitched.
-
C26/0311/13/DA Status unknown
5 & 6 Llys Victoria, Stryd Fawr, Bethesda, Bangor, LL57 3AN
Diwygiad ansylweddol i gais cynllunio C25/0422/13/LL er mwyn diwygio dyluniad y ffenestr gromen i gynnwys 2 ffenestr (3 yn flaenorol) Non-material amendment to planning application to amend the design of the dormer window to include 2 windows (formerly 3).
-
C26/0307/42/DA Status unknown
Tir Maes Twnti, Morfa Nefyn, Pwllheli, LL53 6EU
Cais am ddiwygiadau di-faterol i ganiatâd cynllunio C24/0689/42/LL er mwyn newid lefelau lloriau gorffenedig y lleiniau er mwyn sicrhau cydymffurfiaeth gydag Dogfen M a draenio gydag man diweddariadau cydlyniad i'r gosodiad. Application for non-material amendments to planning approval C24/0689/42/LL for changing the finished floor levels of the plots to ensure compliance with Doc M and drainage, alongside minor coordination updates to the layout
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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