How many listed buildings are in Gwynedd? 4,182 listed buildings

Gwynedd has 4,182 listed buildings, 46 of them Grade I. More listed buildings per home than 91% of areas in England and Wales.

Grade I
46
Grade II*
229
Grade II
3,907
Per 1,000 homes
81.8
More listed buildings per home than
91% of areas

Listed buildings and scheduled monuments are counted where their map point falls; one list entry can cover a terrace or group. Per 1,000 homes uses Census 2021 households. Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), licensed under the Open Government Licence. How we calculate this

All house prices in Gwynedd

Is a home in Gwynedd likely to be in a conservation area?

Conservation areas in Wales are not included yet.

In a conservation area you usually need planning permission for work that would be allowed elsewhere, such as cladding, side extensions, some roof changes and demolishing most buildings, and you must give the council six weeks' notice before cutting back or felling most trees. Some areas have extra Article 4 rules, for example on replacing windows or doors. Check with the council before you buy.

What does it mean if a home is listed?

A listed home needs listed building consent for any work that affects its character, inside or out, and doing that work without consent is a criminal offence. Grade I buildings are of exceptional interest (about 2.5% of listed buildings), Grade II* are particularly important (about 5.8%), and most, about 92%, are Grade II. One list entry can cover a whole terrace.

This page shows how common listed buildings are in Gwynedd. To check a specific address, search the official list entry or ask the council.

What are the Grade I listed buildings in Gwynedd?

Gwynedd has 46 Grade I listed buildings, the highest grade.

Grade I listed buildings in Gwynedd
BuildingListed
Bangor University Main Arts (formerly University College of North Wales main building)1949
Caernarfon Castle1983
Caernarfon Town Wall1983
Capel Jerusalem1997
Capel Newydd1971
Capel Peniel1951
Cathedral church of St Deiniol1949
Chapel of St Mary to N of Vaynol Old Hall1952
Church of St Baglan1968
Church of St Beuno1971
Church of St Beuno, with attached Chapel of St Beuno1968
Church of St Brothen1966
Church of St Cadfan1951
Church of St Cawrdaf1971
Church of St Celynin1966
Church of St Engan1971
Church of St Gwynhoydl1971
Church of St Hywyn1971
Church of St Iestyn1971
Church of St Mark1995
Church of St Mary1953
Church of St Mary and St Egryn1966
Church of St Peblig1953
Church of St Tanwg1966
Cochwillan1952
County Court (former County Hall)1953
Criccieth Castle1949
Cymer Abbey1966
Dinorwic Slate Quarry Workshops (Welsh Slate Museum Buildings)1999
Dolbadarn Castle1999
Ffynnon Cybi and associated works1971
Fort Belan1968
Glynllifon1952
Harlech Castle2001
Menai Suspension Bridge1949
Parish Church of Saint Mary and Saint Bodfan1951
Parish Church of St Derfel1966
Penarth-fawr1971
Penrhyn Castle1966
Police Station, including forecourt railings and gate piers1953
Portmeirion Town Hall1952
Royal Welsh Yacht Club (also known as Porth yr Aur)1953
Ruin of Abbey of St Mary1971
St Philip's Church1992
Vaynol Hall1952
Vaynol Old Hall1952

Each name links to its official list entry.

Are there scheduled monuments in Gwynedd?

Yes, Gwynedd has 512 scheduled monuments: nationally important sites such as earthworks, ruins and ancient buildings, protected from unauthorised change. These are 50 of them.

Which part of Gwynedd has the most listed buildings?

Dolgellau has the most listed buildings of the 64 areas of Gwynedd, with 270.

Listed buildings in each area of Gwynedd
AreaListed buildingsPer 1,000 homesHomes in a conservation area
Dolgellau270218.6—
Caernarfon25858.5—
Bangor19837.2—
Porthmadog18299.5—
Llandygai157151.4—
Llandwrog139128.0—
Pwllheli13573.4—
Aberdaron123——
Beddgelert115——
Penrhyndeudraeth105115.1—
Llandderfel102——
Llanllyfni10156.7—
Pentir9271.3—
Maentwrog91——
Llanfrothen88——
Barmouth8885.2—
Dolbenmaen74135.8—
Llanfihangel-y-Pennant73——
Bala7276.2—
Ffestiniog7233.2—
Llanystumdwy7185.7—
Brithdir and Llanfachreth67——
Llanllechid66——
Mawddwy66——
Llannor6671.6—
Talsarnau64——
Llanengan6176.4—
Dyffryn Ardudwy6187.5—
Arthog54107.1—
Corris53——
Llanfair47——
Llanbedr46——
Llanegryn44——
Llanuwchllyn42——
Aberdovey40——
Llanddeiniolen4019.4—
Bethesda4019.3—
Criccieth3950.8—
Buan39——
Llanelltyd36——
Llanberis3641.0—
Llanwnda3643.5—
Llanrug3630.9—
Tudweiliog35——
Clynnog34——
Llangelynin33——
Y Felinheli3331.7—
Pennal32——
Tywyn3220.4—
Waunfawr3150.6—
Betws Garmon27——
Bryn-Crug26——
Llanycil23——
Botwnnog22——
Harlech2234.1—
Bontnewydd21——
Aber21——
Trawsfynydd21——
Llangywer20——
Nefyn1715.5—
Ganllwyd15——
Llanbedrog15——
Llanaelhaearn15——
Pistyll11——

A dash means the area is too small for a fair rate, or its council has not published conservation area boundaries.

What else do people ask about Gwynedd?

More quick answers on house prices, sales, areas, green space, crime, air quality and listed buildings in Gwynedd.

Where does this data come from?

Price information is from HM Land Registry, location boundaries are from OpenStreetMap, and households and population are from Nomis Census 2021 postcode estimates (21 March 2021). Parks and green space are from OS Open Greenspace. Contains OS data © Crown copyright and database right 2026. Crime is from police.uk street-level data. Contains public sector information licensed under the Open Government Licence v3.0. Source: police.uk. Listed buildings and scheduled monuments are from Historic England and Cadw, and conservation areas from planning.data.gov.uk. Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), licensed under the Open Government Licence. Air quality is from Defra modelled background pollution maps. Contains public sector information licensed under the Open Government Licence v3.0. Source: Defra modelled background pollution, 2025.

Last updated 11 November 2026 at 00:15 with the latest Land Registry data (September 2026). The Gwynedd dataset covers 6,531 postcodes.

Read our full data methodology

Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

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