Council hub · Wales
Gwynedd planning applications
663 applications.
As of July 2026, PlanIndex holds 663 planning applications from Gwynedd.
All applications
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C26/0395/34/SO Status unknown
Arfordir Bae Caernarfon, Gwynedd
Cais am farn gwmpasu o dan Reol 14, Rhan 4 o Reoliadau Cynllunio Gwlad a Thref [Asesiad Effaith Amgylcheddol] [Cymru] 2017. Mae'r datblygiad sy'n destun y cais wedi'i gyfyngu i elfennau morol Prosiect Western Link 2, sy'n cynnwys ceblau tanddwr rhwng dau leoliad glanio ar arfordir Swydd Ayr yn yr Alban (Cynigion Morol Mewndirol SPEN), ynghyd â cheblau tanddwr rhwng y man glanio yn Swydd Ayr, yr Alban, a'r man glanio yng Ngwynedd, Gogledd Cymru (Cynigion Morol Mewndirol National Grid). Mae'r datblygiad yn cynnwys y cydrannau canlynol: • Man Glanio 1 (man glanio ar gyfer Cynigion Morol Mewndirol SPEN) (Monkton, Swydd Ayr, yr Alban). • Llwybr cebl tanddwr Cerrynt Union Foltedd Uchel (HVDC) (Cynigion Morol Mewndirol SPEN) rhwng dau leoliad ar arfordiroedd gogleddol a deheuol Swydd Ayr yn yr Alban. • Man Glanio 2 (man glanio ar gyfer Cynigion Morol Mewndirol SPEN) (Curragh Shore, Swydd Ayr, yr Alban). • Llwybr cebl tanddwr HVDC (Cynigion Morol Mewndirol SPEN, Cynigion Morol Ehangach National Grid, a Chynigion Morol Mewndirol National Grid) rhwng man glanio ar arfordir Swydd Ayr yn yr Alban a man glanio ar arfordir Gwynedd yng Nghymru. • Man Glanio 3 (man glanio ar gyfer Cynigion Morol Mewndirol National Grid) (Gwynedd, Gogledd Cymru). Request for a scoping opinion under Regulation 14, Part 4 of the Town and Country Planning [Environmental Impact Assessment] [Wales] Regulations 2017. Development subject of the request is limited marine scheme of the Western Link 2 project that includes subsea cabling between two landfall locations on the Ayrshire, Scotland coastline (SPEN’s Inshore Marine Proposals), alongside subsea cabling between the landfall at Ayrshire, Scotland and landfall at Gwynedd, North Wales (National Grid’s Inshore Marine Proposals). It includes the following components; • Landfall 1 (landfall for SPEN’s Inshore Marine Proposals) (Monkton landfall, Ayrshire, Scotland) • subsea high-voltage direct current (HVDC) cable route (SPEN’s Inshore Marine Proposals) between two locations on the northern and southern Ayrshire coast in Scotland • Landfall 2 (landfalls for SPEN’s Inshore Marine Proposals) (Curragh Shore landfall, Ayrshire, Scotland) • subsea HVDC cable route (SPEN’s Inshore Marine Proposals, National Grid’s Wider Marine Proposals and National Grid’s Inshore Marine Proposals) between a landfall on the Ayrshire coast in Scotland to a landfall on the Gwynedd coast in Wales • Landfall 3 (landfall for National Grid’s Inshore Marine Proposal) (Gwynedd, North Wales).
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C26/0391/14/HY Status unknown
Coral, 10 Pool Street, Caernarfon, Gwynedd, LL55 2AB
Gosod 2 flwch goleuo wed'i goleuo yn fewnol Installation of 2 no internally illuminated lightboxes
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C26/0392/09/LL Status unknown
THE VICTORIA-N-SLIPWAY Marine Parade, Tywyn, Gwynedd, LL36 0DG
Estyniad i Dŷ Tafarn ynghyd â gwaith allanol cysylltiedig / Extension to Public House and associated external works
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C26/0387/44/HY Status unknown
THE ORIGINAL FACTORY SHOP, 70 High Street, Porthmadog, Gwynedd, LL49 9NW
Cais am arwyddion lefel uchel wedi'u goleuo ar y drychiadau blaen ac ochr dde, arwyddion taflunol wedi'u goleuo ar y drychiadau ochr dde ac ochr chwith, ac arwydd nad yw wedi'i goleuo ar y drychiad cefn / Application for Illuminated high level signs to front and right hand side elevations, illuminated projecting signs to right and left hand elevations and non illuminated sign to rear elevation
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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
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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.
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C26/0380/18/LL Status unknown
FFERM TAN Y DDERWEN, Llanddeiniolen, Caernarfon, Gwynedd, LL55 3AP
Codi sied amaethyddol ar gyfer storio offer a pheiriannau Erection of an agricultural shed for the storage of implements and machinery
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C26/0376/45/LL Status unknown
PLAS HELI Glan Y Don Industrial Estate, Pwllheli, Gwynedd, LL53 5YT
Adeiladu bloc toiledau a chawodydd arfaethedig yn plas Heli / Construction of proposed toilet and shower block at Plas Heli.
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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.
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C26/0378/09/LL Status unknown
Land At Pendre Enterprise Park, Tywyn, LL36 9LW
Codi ffens derfyn, giatiau, trac mynediad ac adeilad storio peiriannau, ynghyd a gosod 3 cynhwysydd llongau 40 troedfedd i bwrpas storio / Erection of perimeter fencing, gates, access track and plant storage building, and siting of 3no. 40ft shipping containers for storage.
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C26/0377/03/DT Status unknown
TŶ GWYN Ffordd Cwmorthin, Tanygrisiau, Blaenau Ffestiniog, Gwynedd, LL41 3SN
Estyniad Cefn arfaethedig ac addasiadau cysylltiedig Proposed rear extension and associated alterations
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C26/0373/39/DT Status unknown
Tawelfa, Llwyn Onn Estate, Abersoch , LL53 7EP
Cais am addasiadau ac estyniadau i ailfodelu'r annedd bresennol drwy:- estyniad ochr a chefn, addasiadau i'r to i greu llety ar y llawr cyntaf a gwelliannau effeithlonrwydd ynni i'r rhannau o'r tŷ sy'n cael eu cadw. Application for alterations and extensions to remodel the existing dwelling through:- side and rear extension, roof alterations to create first floor accommodation and energy efficiency upgrades to the parts of the house being retained.
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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
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C26/0369/14/CC Status unknown
AFONLAN, 55 Cae Gwyn, Caernarfon, Gwynedd, LL55 1LL
Gwaith tocio i goeden sy'n destun Gorchymyn Gwarchod Coed. Crown reduction of a tree protected by a Tree Preservation Order.
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C26/0372/41/LL Status unknown
Harlech Frozen Foods, HARLECH FROZEN FOODS Dwyfor Food Park, Llanystumdwy, Criccieth, Gwynedd, LL52 0LJ
Codi adeilad storio dros dro i ddarparu ar gyfer cynnydd dros dro yn y galw am gynhyrchion. / Erection of a temporary storage building to accommodate a temporary increase in demand for products.
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C26/0365/09/DT Status unknown
11 Corbett Close, Tywyn, Gwynedd, LL36 0BL
Cais am estyniad llawr daear a llawr cyntaf i gynnwys balconi / Application for a ground and first floor extension to dwelling including balcony
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C26/0382/46/LL Status unknown
TŶ MAWR, Llangwnnadl, Pwllheli, Gwynedd, LL53 8NU
Codi estyniad unllawr ar ochr ty annedd, trosi adeilad allanol sydd ynghlwm i ffurfio rhan o'r eiddo a gwaith adfer i adeilad allanol arwahan / Erection of a single storey extension to the side of dwelling house, conversion of attached outbuilding to form part of dwelling and works to repair a separate outbuilding.
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C26/0368/38/CC Status unknown
CELYN, Llanbedrog, Pwllheli, Gwynedd, LL53 7TY
Gwneud gwaith amrywiol i goed sy’n destun Gorchymyn Gwarchod Coed yn cynnwys lleihau coronau a thocio Various work to trees under a Tree Preservation Order to includes crown reductions and topping
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C26/0367/46/CR Decided
TŶ MAWR, Llangwnnadl, Pwllheli, Gwynedd, LL53 8NU
Codi estyniad unllawr ar ochr ty annedd, trosi adeilad allanol sydd ynghlwm i ffurfio rhan o'r eiddo a gwaith adfer i adeilad allanol arwahan / Erection of a single storey extension to the side of dwelling house, conversion of attached outbuilding to form part of dwelling and works to repair a separate outbuilding.
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C26/0364/42/DT Status unknown
HAFAN WEN Lôn Golff, Morfa Nefyn, Pwllheli, Gwynedd, LL53 6DA
Estyniad ochr llawr cyntaf ac estyniad llawr isaf unllawr. First floor side extension and ground floor single storey extension.
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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
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C26/0356/19/RA Status unknown
Cyngor Gwynedd, BONTNEWYDD PRIMARY SCHOOL, Bontnewydd, Caernarfon, Gwynedd, LL55 2UF
Cais ar gyfer rhyddhau amodau (4), (13) ac (16) o ganiatâd cynllunio C24/1050/19/LL sy'n ymwneud a (4) darparu rhaglen o waith Archeolegol, (13) cyflwyno Cynllun Rheoli Amgylcheddol Adeiladu (CEMP), (16) cyflwyno arolwg lleoliad asedau, cynllun manwl ac os angen cynllun ddargyfeirio asedau Dwr Cymru / Application to discharge conditions (4), (13) and (16) of planning permission C24/1050/19/LL in relation to (4) providing a specification for a programme of archaeological work, (13) submission of Construction Environmental Management Plan (CEMP), (16) submission of asset location survey, detailed plan and if necessary a scheme to divert the Welsh Water assets.
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C26/0357/14/HY Status unknown
MORGAN LLOYD, 10 Castle Square, Caernarfon, Gwynedd, LL55 2NF
Uwchraddio'r arwyddion presennol / Upgrade existing signs
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C26/0354/14/DT Status unknown
BRYN MÔR England Road North, Caernarfon, Gwynedd, LL55 1HS
New first floor balcony to front of property along with new glazed doors. Balconi newydd ar y llawr cyntaf ar flaen yr eiddo ynghyd â drysau gwydr newydd.
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C26/0355/09/LL Status unknown
Cyngor Gwynedd, PENYBRYN SCHOOL Ffordd Cadfan, Tywyn, Gwynedd, LL36 9EF
Cais i waredu y rheiliau metel du presennol a gostwng y pileri brics presennol i lefel y wal derfyn garreg. Gosod ffens ddiogelwch weldmesh newydd 6 troedfedd (tua 1.8m) o uchder ar ben y wal is sy’n weddill er mwyn gwella diogelwch ffin. Application for removal of existing black metal railings and reduction of existing brick pillars down to the level of the lower stone boundary wall. Installation of a new 6-foot (approx. 1.8m) weldmesh security fence mounted on top of the remaining lower wall to enhance boundary security.
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C26/0351/44/DT Status unknown
71 Pensyflog, Porthmadog, Gwynedd, LL49 9LD
Dymchwel sied bresennol a chodi estyniad deulawr i gefn yr eiddo. Demolition of existing shed and erection of two storey extension to the rear of the property.
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C26/0353/23/RA Status unknown
Llys Derwen Camping & Caravan Site, Caravan Park, LLYS DERWEN Ffordd Minffordd, Llanrug, Caernarfon, Gwynedd, LL55 4RD
Rhyddhau amod 7 (Cynllun Rheoli Sŵn) ac amod 8 (Strategaeth Awyru ac Acwstig) o ganiatâd cynllunio C25/0932/23/LL. Discharge of condition 7 (Noise Management Plan) and condition 8 (Ventilation & Acoustic Strategy) of planning permission C25/0932/23/LL.
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C26/0345/18/LL Status unknown
Amgueddfa Cymru, Llanberis, LL55 4TY
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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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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C26/0348/41/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)
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C26/0343/44/DT Status unknown
12, CAE FFYNNON CHALET PARK Beach Road, Morfa Bychan, Porthmadog, Gwynedd, LL49 9YQ
Cais am estyniad arfaethedig ynghyd â disodli’r cladin allanol / Proposed extension and replace external cladding
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C26/0332/20/DT Status unknown
Moel Y Don, Glan Y Mor, Felinheli, LL56 4RQ
Addasiadau i amgáu y balconi presennol ar brif wyneb blaen yr eiddo Alterations to enclose the existing balcony on the principal front elevation of the property
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C26/0342/00/LL Status unknown
Cei Y Gogledd, I'r Gogledd O Ffordd Yr Ysgol Promenade, Abermaw
Darparu amddiffynfeydd môr newydd ar Bromenâd y Gogledd Abermaw gan gynnwys wal gynnal y graig newydd ar y traeth, tynnu grwynau, ailwampio’r wal gynnal goncrid, atgyweirio’r brif wal, gosod cwrb a balwstrad yn lle’r wal ganolog, ail adeiladu’r wal eilaidd, amddiffynfeydd rhag llifogydd dros dro, ailadeiladu ac ymestyn y ramp mynediad, uwchraddio’r briffordd, gwella’r ollyngfa dŵr wyneb ynghyd a gwella nodweddion tirwedd a thir y cyhoedd. Provide new sea defences on Barmouth North Promenade, including a new rock revetment wall on the beach, removal of groynes, refurbishment of the concrete retaining wall, repair of the main wall, installation of a kerb and balustrade in place of the central wall, reconstruction of the secondary wall, temporary flood defences, rebuilding and extension of the access ramp, highway improvements, enhancement of the surface water outfall, together with improvements to landscape features and public land.
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C26/0340/14/DT Status unknown
Y BETWS, 10 Pengelli Wyn, Caernarfon, Gwynedd, LL55 1EA
Codi estyniad unllawr i gefn yr eiddo Erection of single storey extension to the rear of the property
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C26/0338/11/LL Status unknown
44 Farrar Road, Bangor, Gwynedd, LL57 1LJ
Trosi rhan o’r annedd bresennol i ffurfio uned breswyl hunangynhaliol ar wahân (defnydd C3). Conversion of part of existing dwelling to form a separate self-contained residential unit (C3 use).
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C26/0336/02/RA Status unknown
Tir Ger Pandy / Land Next To Pandy, Corris, SY20 9RJ
Cais i rhyddhau amodau a ategwyd ar ganiatâd C25/0462/02/LL yn benodol: Amod 10 Cynllun Goleuo; Amod 11 Cynllun Gwyrych/ Ffens llechi; Amod 12 Manylion Tirlunio Caled a Meddal; Amod 15 Enw’r Safle; Amod 16 Cynllun Rheoli; Amod 19 Cynllun Atal LlygreddApplication to discharge conditions imposed on planning approval C25/0462/02/LL namely: Condition 10 Lighting Plan; Condition 11 hedge/Slate Fence Plan; Condition 12 Hard & Soft Landscaping details; Condition15 Name of Site; Condition 16 Management Plan; Condition 19 Pollution Prevention Plan
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C26/0335/39/DT Status unknown
HAFAN GELTAIDD, 1 Ger Y Foel Estate, Mynytho, Pwllheli, Gwynedd, LL53 7RD
Dymchwel y canopi llawr gwaelod blaen a’r balconi integredig, ac adeiladu estyniad ystafell wely ar y llawr gwaelod gyda balconi ar y llawr cyntaf. / Demolition of front ground floor canopy and integral balcony and the construction of a ground floor bedroom extension with balcony to first floor.
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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.
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C26/0333/35/HD Status unknown
2, PARCIAU BACH Lôn Fêl, Criccieth, Gwynedd, LL52 0LN
Dymchwel estyniad presennol / Demolition of existing extension
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C26/0331/09/DT Status unknown
TRESDDOLEN, 23 Ffordd Cadfan, Tywyn, Gwynedd, LL36 9EE
Cais i drosi atig, codi porth a newidiadau mewnol / Application for a loft conversion, Porch and Internal Remodelling
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C26/0330/26/DT Status unknown
PENNANT, Caeathro, Caernarfon, Gwynedd, LL55 2SG
Codi adeilad allanol unllawr to un brig, yn cynnwys swyddfa, gym ac ystafell ymolchi sydd yn cynnwys toilet. Proposed erection of new single storey lean-to roof building incorporating a gym office + WC room.
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C26/0329/16/RA Status unknown
Chwarael Penrhyn / Penrhyn Quarry, Bethesda, LL57 4YG
Cais ar gyfer rhyddhau amod 37 (adroddiad manwl ar waith archeolegol) ar ganiatâd cynllunio C22/0336/16/MW / Application to discharge condition 37 (detailed report on archaeological works) on planning permission C22/0336/16/MW
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C26/0328/02/YA Status unknown
Cymerau Layby, Aberllefenni, SY20 9RZ
Cais rhybudd o flaen llaw i greu cilfan 20m o hyd x 4m o led o fewn y goedwig / Prior approval application to create a 20m long x 4m wide lay by within the forest
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C26/0327/26/DT Status unknown
LYNFOD, Waunfawr, Caernarfon, Gwynedd, LL55 4YS
Cais ar gyfer adeiladu estyniad deulawr yng nghefn yr eiddo ynghyd a porth i flaen yr eiddo. Two-storey extension to the rear of the property. Single-storey porch to the principle elevation.
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C26/0324/44/LL Status unknown
Bywyd Gwyllt Glaslyn, Prenteg, LL49 9SP
Cais i ailosod decin, cladin, rampiau a grisiau o amgylch adeilad presennol y ganolfan wylio gwalch y pysgod, ymestyn y decin i dair ochr yr adeilad i gynnwys ardal biniau (ochr orllewinol). Lleoli dysgl microdon yng nghornel gogledd-ddwyrain yr adeilad i ymestyn 1m uwchben lefel y to. Gosod tŵr dur delltog newydd i gynnal camera PTZ, uchder 7m a 5.1m o led, 2m o ganol ochr orllewinol y guddfan Application to replace decking, cladding, ramps and steps around existing osprey viewing centre building, extend decking to three sides of the building to include a bin area(west side) Locate microwave dish at north-east corner of building to extend 1m above roof level. Instal new lattice steel tower to support PTZ camera, height 7m width 5.1m 2m from centre of west side of hide .
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C26/0320/22/LL Status unknown
Land Near Hafan, Land Near Hafan, Llanllyfni, LL54 6ST
Codi 1 tŷ deulawr 3 ystafell wely Erection of one two-storey 3-bedroom house.
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C26/0325/46/LL Status unknown
MOEL Y BERTH CARAVAN PARK Ffordd Porth Colmon, Llangwnnadl, Pwllheli, Gwynedd, LL53 8NT
Gosod 3 carafán sefydlog ychwanegol i safle carafanau presennol ynghyd a chysylltu i draeniau presennol. Siting of 3 additional static caravans to existing caravan site including connection to existing drains.
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C26/0318/18/DT Status unknown
CREIGLE, Brynrefail, Caernarfon, Gwynedd, LL55 3NY
Estyniad unllawr i'r drychiad blaen. Erection of a single storey extension to the front elevation.
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C26/0323/39/DT Status unknown
Bodlondeb Lon China, Mynytho, Pwllheli,, LL53 7RN
Tynnu’r consyrfatri cefn presennol a’r estyniad, a chodi 2 estyniad cefn newydd unllawr bach a dormer to fflat. Tynnu 1 simne bresennol i ddarparu mwy o le a chreu trefniant byw mewnol mwy agored. Adfer y gwaith cerrig presennol i’r drychiad blaen, y tŷr pen (gable) a’r simneiau. / Removal of existing rear conservatory & extension and construction of 2no. new small single-storey rear extensions and flat roof dormer. Removal of 1no. existing chimney to provide additional space and a more open planning living arrangement internally. Restoration of existing stonework to front elevation, gable end and chimneys.
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C26/0319/17/LL Status unknown
BRYN RHEDYN, Y Fron, Caernarfon, Gwynedd, LL54 7BG
Proposed rebuilding and refurbishment of existing barn structures. Ailadeiladu ac adnewyddu arfaethedig o strwythurau ysgubor presennol.
Recent decisions
Data to July 2026
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C22/0034/16/DT Refused
1 Bryngeraint Terrace, St Ann's, Mynydd Llandygai, Bangor, Gwynedd, LL57 4AZ
Cais ar gyfer codi estyniad deulawr i gefn ac ochr yr eiddo ynghyd a chodi estyniad un llawr blaen i greu lolfa haul / Application for two storey extension to rear and side of dwelling together with single storey front extension to create sunlounge
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Common questions
When is planning activity busiest in Gwynedd?
November 2025 was the busiest month across the 12 months to July 2026, with 85 applications recorded. The monthly pattern is listed on this page.
How do I find a planning application by its reference number?
Every application indexed here has its own page at a stable address. Look the reference up in a search engine together with the council name, or browse the latest applications below. Each page shows the description, address, dates and decision as the council published them.
Where can I see the full documents for an application?
Plans, drawings and officer reports stay on Gwynedd's own planning portal. Every application page here links straight to the source record.
Cite these figures
Click the text to select the whole citation.
Gwynedd: 663 planning applications on record as of July 2026. 661 new applications received in the same period. Source: PlanIndex, planindex.co.uk.