Photo: Ian Greig · CC BY-SA 2.05 listed buildings
On the Cadw list, all of them stand inside Trearddur’s built-up area, 54 for every 10,000 residents. Every listed building in Trearddur is Grade II. 15% of its homes were built before 1919.
Where Trearddur’s history is
Every Grade I and II* building, monument and historic park.
Hover a dot for its name; tap one with a photo to open it.
Cadw lists buildings of special architectural or historic interest in three grades: Grade I for buildings of exceptional interest, Grade II* for particularly important buildings of more than special interest, and Grade II for buildings of special interest. Listing protects the whole building, inside and out.
Every entry on Cadw’s register of listed buildings whose point lies inside the ONS 2022 built-up-area boundary. One list entry can cover a terrace or a group of buildings.
5 Grade II listed buildings
Most listed buildings are in this grade, which covers buildings of special interest. Open any building to read its official list entry.
All 5 Grade II listed buildings, A to Z
Listed buildings in the places around Trearddur
| Town | People | Listed | Grade I | History |
|---|---|---|---|---|
| Trearddur | 932 | 5 | 0 | — |
| Holyhead | 11,753 | 53 | 2 | A− |
| Valley | 2,003 | 3 | 0 | C− |
| Bodedern | 1,193 | 4 | 0 | B− |
| Llanerchymedd | 1,155 | 3 | 0 | B− |
| Cemaes | 1,023 | 1 | 0 | C |
Trearddur in brief
Trearddur has 5 listed buildings. Otherwise the figures are ordinary: all its entries went on the list in 1998; and 15% of its homes were built before 1919, close to the 15% in the typical UK town.
Questions about Trearddur’s history
How many listed buildings are there in Trearddur?
Cadw lists 5 buildings inside Trearddur’s built-up area: 0 Grade I, 0 Grade II* and 5 Grade II.
How old are the homes in Trearddur?
15% of homes were built before 1919 and 24% before 1940, from the Valuation Office Agency’s council tax records (March 2025).
Trearddur has no History Grade.
Listed buildings, scheduled monuments and historic parks and gardens: Cadw, © Crown copyright, via DataMapWales.
Sources: Cadw listed buildings, scheduled monuments and registered historic parks and gardens via DataMapWales, October 2026, inside the ONS 2022 built-up-area boundary · Valuation Office Agency, Council Tax: stock of properties by build period (31 March 2025) · TownRatings grades: our own summary of the data, ranked against UK towns only. All under the Open Government Licence v3.0.
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.