Planning applications in Gwynedd, September 2025

Tŷ Traeth Copr, Dinas Dinlle,, LL54 5TW

Cais ôl weithredol i ymestyn cwrtil eiddo preswyl, codi porth car, yn ychwanegol i godi ystafell gemau, modurdy a storfa cwch. Retrospective application to extend domestic curtilage of property and erection of carport, in addition to erection of proposed games room, garage and boat storage

MANOR HOUSE High Street, Deiniolen, Caernarfon, Gwynedd, LL55 3HR

Gosod pwmp gwres ffynhonnell aer. / Air source heat pump installation

B & Q PLC Caernarfon Road, Bangor, Gwynedd, LL57 4SU

Gosod arwyddion ffasgia wedi'u goleuo a heb eu goleuo. Gan gynnwys arwydd totem newydd gyda'r geiriad 'B&Q' yn unig wedi ei oleuo. Illuminated and non illumianted fascia signs. Including new totem sign with wording 'B&Q' only to illuminate.

HSBC BANK, 51 High Street, Criccieth, Gwynedd, LL52 0EY

Diwygio amod 2 (oriau agor) o ganiatad cynllunio C23/0110/35/AC er mwyn agor o 08:00 - 23:00 o ddydd Llun i dydd Sul. Variation of condition 2 (opening hours) of planning permission C23/0110/35/AC to open between 08:00 - 23:00 from Monday to Sunday.

Coleg Menai, Friars Building, COLEG MENAI Ffriddoedd Road, Bangor, Gwynedd, LL57 2TS

Dymchwel estyniadau cefn a chodi estyniad deulawr newydd ynghyd a gwaith tirluno, codi adeilad beics a sbwriel ac ail-osod y maes parcio / Demolish existing rear extensions and erect new two storey extension together with landscaping works, erect new bike and bin store and re-organise layout of car park

DERWIN FAWR, Pant Glas, Garndolbenmaen, Gwynedd, LL51 9LZ

Cyfnewid tri tyrbin gwynt presennol gyda tyrbinau newydd gyda diamedr o 30m, ar dyrrau 30m (i ganol y rotwr) gyda uchder blaen 45m, gyda sylfeini newydd a gwelliannau mynediad. Replacement of existing 3x wind turbines new 30m dia wind turbines, on 30m (to rotor centre) towers (45m tip height) with new foundations, and access improvements

Tir Oddi Ar / Land Off - Lon Arfryn, Penrhyndeudraeth, LL48 6RW

Cais llawn ar gyfer dyluniad wedi'i ddiwygio i gynlluniau a gymeradwywyd ar gyfer annedd newydd o dan gyfeirnodau cynllunio C06M/0142/AM a C11/0392/08/MG. Full Planning for amended design to approved plans for new dwelling under planning references C06M/0142/AM and C11/0392/08/MG.

4 Aber Cottages, Y Felinheli, Gwynedd, LL56 4JY

Tocio coron coeden mewn Ardal Gadwraeth. / Crown reduction of tree in Conservation Area.

Coleg Menai, Friars Building, COLEG MENAI Ffriddoedd Road, Bangor, Gwynedd, LL57 2TS

Dymchwel estyniadau cefn a chodi estyniad deulawr newydd ag addasiadau mewnol i'r prif adeilad / Demolish existing rear extensions and erect new two storey extension and internal alterations to main building

Tir Gyferbyn / Land Opposite Bron Eifion Lodge, Criccieth, LL52 0RY

Rhyddhau amod 7 ( cyflwyno adroddiad manwl ar y gwaith archeolegol ) ar ganiatad Cynllunio C21/0718/41/LL Discharge condition 7 (submit a detailed report on the archaeological work) on Planning permission C21/0718/41/LL

Flat 16, Tŷ Criccieth Ffordd Porthmadog, Criccieth, Gwynedd, LL52 0HQ

Newid defnydd o C5 ail gartref i C6 uned gwyliau / Change of use fron C5 second home to C6 short term holiday accommodation

45 Hen Gei Llechi, Y Felinheli, Gwynedd, LL56 4PD

Gosod 10 o baneli haul i ddrychiad blaen yn unig. Installation of 10 solar panels to the front elevation only.

Barn Adj To 1 Mur Mawr, Llanberis, Caernarfon, LL55 4TG

Gwaith trosi a newid arfaethedig i adeilad allanol presennol er mwyn ffurfio llety gwyliau hunangynhwysol newydd (sy'n dod o dan ddosbarth defnydd C6). Proposed conversion and alteration works to an existing outbuilding in order to form a new self-contained holiday accommodation (falling under use class C6).

LLUESTY Brynhyfryd Road, Tywyn, Gwynedd, LL36 9HG

Adeiladu modurdy dwbl yn lle'r modurdy sengl presennol Construction of double garage in lieu of existing single garage

Siop Grefftau Yr Antur, Siop Grefftau Yr Antur, 27 High Street, Criccieth, Gwynedd, LL52 0BS

Amnewid ffenestri a drysau pren ar wyneb y siop/swyddfa sydd wedi'i lleoli mewn ardal gadwraeth. Replacement of wooden windows and doors on the frontage of the shop/office premises which is situated within a conservation area.

BRYN MENAI, Y Fron, Caernarfon, Gwynedd, LL54 7PT

Ymestyn tŷ annedd presennol i mewn i cyn swyddfa bost. Extension of existing dwelling into former post office.

Talgarth Hwfa Road, Bangor, Gwynedd, LL57 2BN

Newidiadau mewnol arfaethedig, gwaith allanol i hwyluso mynediad i'r annedd a chodi adeilad gardd i unigolyn anabl. Proposed internal alterations, external works to facilitate access into the dwelling and erection of garden building for a disabled individual.

Plot C6, Parc Bryn Cegin, Llandegai, Bangor, LL57 4BG

Diwygiadau ansylweddol i'r cynlluniau a gymeradwywyd gan ganiatâd cynllunio C23/0072/16/LL ar gyfer codi adeilad ar gyfer Dosbarthiadau Defnydd B1/B2,/B8 ac adeilad i'w ddefnyddio fel Masnachwr Adeiladwyr gyda storfa allanol gysylltiedig, ardal arddangos, mynediad, parcio, goleuadau, ffensio, tirlunio caled a meddal. I gynnwys gwelliannau i gynllun y safle, cynlluniau llawr a drychiadau unedau 1-6 fel y'u cymeradwywyd yn flaenorol. Non material amendments to the plans approved by planning permission C23/0072/16/LL for Erection of building for Use Classes B1/B2,/B8 and a building for use as a Builders' Merchant) with associated external storage, display area, access, parking, lighting, fencing, hard and soft landscaping. To include amendments to site layout, floor plans & elevations of units 1-6 as previously approved.

Fildon, 17 Cae Gwyn, Caernarfon, Gwynedd, LL55 1LL

Estyniad ystafell haul, trosi rhan modurdy, ffenestri gromen newydd ochr ac amnewid to fflat. Proposed sunroom extension, part garage conversion, new side dormer windows and replacement flat roof.

Land Adjacent Top Glan Y Mor Marine Parade, Tywyn , LL36 0DJ

Rhyddhau amodau 3 (Llechi) , 4 (gorffeniad allanol) a 8 (tirlunio caled a meddal) ar ganiatad Cynllunio C20/0981/09/LL Discharge condition 3 (slates), 4 (external finish) and 8 (hard and soft landscaping) on Planning permission C20/0981/09/LL

Tir Ger Maes Parcio Bysiau, , Llanberis, LL55 4UR

Gosod cerflun fel dehongliad o Safle Treftadaeth y Byd Tirwedd Llechi Gogledd Orllwein Cymru / Installation of a sculpture as an interpretation of the North West Wales Slate Landscape World Heritage Site

Y Ship Inn, 14 Lombard Street, Porthmadog, Gwynedd, LL49 9AP

Addasiadau mewnol / Internal alterations

FOUNDRY HOUSE, Tanygrisiau, Blaenau Ffestiniog, Gwynedd, LL41 3TW

Estyniad cefn deulawr arfaethedig. Proposed rear two storey extension.

Cae Incline Fields,, Bangor, LL57 4HP

Codi 48 o anheddau a datblygiadau cysylltiedig Erect 48 dwellings and associated development

Petris Square, Dorothea Quarry, Talysarn, Caernarfon, LL54 6AE

Newid defnydd tir i'w ddefnyddio fel maes parcio, creu mynediad cerbydol newydd i'r briffordd gyhoeddus, gosod giât, rhwystr uchder ac arwyddion gwybodaeth parcio, cau mynediad gerbydol presennol ac ailosod wal gerrig, gosod 2 banel gwybodaeth a chreu llwybr troed / Change of use of land for use as car park, creation of new vehicular access to the public highway, installation of gate, height barrier and parking information signage, closing up of existing vehicular access and reinstatement of stone wall, installation of 2 information panels and creation of footpath

Cae Cydnerth Pool Street, Penrhyndeudraeth, Gwynedd, LL48 6ND

Diwygiad di-faterol i'r cynlluniau a gymeradwywyd gan ganiatâd cynllunio C22/0472/08/LL i newid y deunydd wyneb o garreg naturiol i rendr llwyd ar rhai mannau allanol o'r annedd. Non material amendment to the plans approved by planning permission C22/0472/08/LL to change the facing material on proposed elevations from natural stone to a warm-grey render

Hen Felin Ffordd Treborth, Treborth, Bangor, Gwynedd, LL57 2RQ

Cais i ddiwygio amod 2 (cynlluniau cymeradwy) a 3 (deunyddiau) o ganiatâd cynllunio C24/0825/25/LL ar gyfer d ymchwel annedd a garej bresennol, codi annedd a garej yn eu lle (dosbarth defnydd C3) ynghyd â datblygiad cysylltiedig gan gynnwys gwaith morglawdd a draenio. Application to amend condition 2 (approved plans) and 3 (materials) of planning permission C24/0825/25/LL for the demolition of an existing dwelling and garage, the erection of a dwelling and garage in their place (use class C3) together with related development including seawall and drainage works.

Coed Ty Uchaf, Bethel, Llandderfel, Bala, LL23 7LA

Creu llwybr cerbyd 4x4 i mewn i'r clawdd i hwyluso rheolaeth goedwig a chynaeafu pren. 4x4 vehicle track to be scratched into bank to facilitate woodland management and timber harvesting.

YSGOLDY Lôn Ceunant, Waunfawr, Caernarfon, Gwynedd, LL55 4SD

Estyniad ochr i'r eiddo. Side extension to property.

1, FRIARS TERRACE High Street, Bangor, Gwynedd, LL57 1YY

Addasiadau mewnol i'r adeilad ac amnewid dau ffenestri modern ar y cefn i ffenestri sash pren / Internal alterations to the building and replace two modern windows to the rear with timber sash windows

Tir Ger / Land By Helyg, Tai Lôn, Nefyn, Pwllheli, LL53 6LG

Cais i ddileu amod 17 ar ganiatâd cynllunio C24/1119/42/LL yn ymwneud a gofod chwarae gyda chyfarpar i blant/ Application to remove condition 17 on planning approval C24/1119/42/LL in relation to equipped children's play space

1, Friars Terrace High Street, Bangor, Gwynedd, LL57 1YY

Defnyddio'r llawr gwaelod, y llawr cyntaf a'r ail lawr o'r adeilad fel tŷ amlfeddiannaeth sy'n darparu chwe ystafell wely [ôl-weithredol] The use of the ground, first and second floors of the building as a house in multiple occupation providing six bedrooms [retrospective]

2, Bryn Llawen, Llanengan, Pwllheli, Gwynedd, LL53 7LG

Cais i ryddhau amodau ar ganiatâd cynllunio C23/0668/39/DT, yn benodol: amod 4 - llechi to; amod 5 - gorffeniadau allanol; amod 8 - gwelliannau bioamrywiaeth / Application to discharge conditions on planning approval C23/0668/39/DT, namely: condition 4 - roof slate; condition 5 - external finishes; condition 8 - biodiversity gains.

TALARFOR, Rhiw, Pwllheli, Gwynedd, LL53 8AD

Cais i amnewid cynhwysydd storio gyda stiwdio gardd a storfa ynghyd a gosod 27 panel solar ar do gwastad ar gefn y bwthyn / Application for replacement of an existing storage container with a Garden Studio and store. Along with the installation of 27 solar panels onto the cottages rear flat roof.

YSTUMLLECH, Trefor, Caernarfon, Gwynedd, LL54 5PT

Adeiladu sied 12m x 8m (3m at y bondo) i storio offer amaethyddol sy'n gysylltiedig â chadwraeth y tir. Hefyd, adeiladu mynedfa newydd o'r ffordd a llwybr graean. Construction of 12m x 8m (3m to eaves) shed to store agricultual equipment related to the conservation of the land. Also the construction of a new entrance from the road and a gravel track

Cyngor Gwynedd, SIR HUGH OWEN SCHOOL Bethel Road, Caernarfon, Gwynedd, LL55 1HW

Codi ffens newydd 2400mm o uchder ogwmpas rhan o ffin y cae chwarae. Erection of new 2400mm high wire mesh fence to part of playing field boundary

SEIONT MANOR HOTEL, Llanrug, Caernarfon, Gwynedd, LL55 2AQ

Addasiadau mewnol ac allanol i drosi'r adeilad ac estyniad i greu ystafelloedd gyfarfod a chynadleddau ynghyd ag ystafelloedd gwely ychwanegol gwesteion mewn cysylltiedig a defnydd y prif Westy Seiont Manor / Internal and external alterations to convert the building and extend to create meeting and conference rooms and additional guest bedrooms associated with the Seiont Manor Hotel

TREMVAN HALL Lôn Bribwll, Llanbedrog, Pwllheli, Gwynedd, LL53 7NN

Estyniad ystafell haul / Sunroom extension

LLANBERIS TOURING CARAVAN PARK Glyn Rhonwy Estate, Llanberis, Caernarfon, Gwynedd, LL55 4EL

Gwaith i goed sy'n destun Gorchymyn Gwarchod Coed Work to trees subject to a Tree Protection Order

Tyddyn Ychain, Chwilog, LL53 6PP

Cais ar gyfer codi estyniad unllawr ar ochr yr eiddo Application for the erection of a single storey side extension

5 Murpoeth Estate, Mynytho, Pwllheli, Gwynedd, LL53 7ST

Estyniad un llawr ar flaen annedd bresennol / Single-storey extension on the front of an existing dwelling

YSTOL HELYG BACH, Uwchmynydd, Pwllheli, Gwynedd, LL53 8DB

Cais i godi estyniad un llawr gyda tho fflat ar y llawr cyntaf yr annedd, fydd yn disodli’r to pig presennol. Bydd yr estyniad yn cynnwys balconi Juliet ar ochr gogledd-orllewinol yr eiddo. Application to build a single-storey extension with a flat roof on the first floor of the dwelling, which will replace the existing pitched roof. The extension will include a Juliet balcony on the north-western side of the property.

TRYFAN COTTAGE, Rhostryfan, Caernarfon, Gwynedd, LL54 7NL

Gosod paneli solar ar y ddaear ger yr eiddo. Amgylchynu safle y paneli solar gyda gwrych newydd ac ffens newydd ogwmpas yr eiddo. Installation of ground mounted solar panels, planting native British hedgerow and new boundary fence.

Cefn Maes, Nefyn, Pwllheli, LL53 6HE

Rhyddhau amod 9 ar ganiatad cynllunio C23/0273/42/LL / Discharge of condition 9 on planning permission C23/0273/42/LL

Plas Mawr, Mynydd Nefyn, Nefyn, Pwllheli, LL53 6TW

Ail gyflwyniad o gais llawn i drosi ac ymestyn adeilad amaethyddol allanol i lety gwyliau hunan gynhaliol C6 ynghyd a chreu mynediad newydd a gosod offer trin / Resubmission of a full application for the conversion and extension of an agricultural outbuilding to self contained holiday let accommodation C6 together with the creation of a new access and package treatment plant installation.

179 Ffordd Manod, Manod, Blaenau Ffestiniog, Gwynedd, LL41 4AR

Estyniad dormer arfaethedig ar y cefn a newid to o'r math 'hip' i dalcen. Proposed dormer extension to rear and alteration from hipped roof to gable.

Tan Y Mur, Stryd Yr Eglwys, Caernarfon , LL55 1SP

Gwaith i goeden sy'n destun Gorchymyn Gwarchod Coed (TPO) / Work to tree subject to a Tree Protection Order (TPO).

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

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

Penrhos Polish Village, Lon Llanbedrog, Pwllheli, Gwynedd, LL53 7HN

Cais i ddiwygio amod 11 a rhyddhau amod 5 ar ganiatad cynllunio C22/0426/38/LL trwy newid lleiniau 13 a 14 o 2 dy par i 3 uned fyddai'n cynnwys uned dwy ystafell wely llawr daear i rai ag anableddau dysgu a dau fflat 1 ystafell wely uwchben; ynghyd a diwygio y math o dai ar leiniau 60 a 61 i 1 bungalow 3 ystafell wely yn lle 2 dy 3 ystafell wely a chynyddu’r nifer o unedau sy’n cael ei adeiladu yng ngham 1 o 14 i 15 a lleihau’r nifer o unedau sy’n cael eu adeiladu o fewn cam 3 o 14 i 13 Application to amend condition 11 and discharge condition 5 of planning approval C22/0426/38/LL by way of an amendment to plots 13 and 14 changing from two semi-detached dwellinghouses to three units comprising of a two-bedroom learning difficulties ground floor unit and two one-bedroom flats above; and amend the house type on plots 60 and 61 to a single three-bedroom bungalow, replacing two three-bedroom dwellinghouses and increase the amount of dwellings provided in phase 1 from 14 to 15 and reduce the number of units provided in phase 3 from 14 to 13.

Denis Ferranti Meters Ltd, Denis Ferranti Meters Caernarfon Road, Bangor, Gwynedd, LL57 4SP

Newid defnydd uned ddiwydiannol bresennol (Dosbarth Defnydd B2) i ganolfan chwaraeon padel dan do (Dosbarth Defnydd D2) a gwaith cysylltiedig Change of use of an existing industrial unit (Use Class B2) to an indoor padel sports centre (Use Class D2) and associated works