Photo: Roger Cornfoot · CC BY-SA 2.0No listed buildings inside Trethomas’s built-up area
From Trethomas, the nearest Grade I building is in Caerphilly, 4.6 km away. 11% of its homes were built before 1919. Trethomas grades D− for history.
Listed buildings near Trethomas
The nearest places with Grade I listed buildings, within 25 km.
| Town | Distance | Listed | Grade I | History |
|---|---|---|---|---|
| Caerphilly | 4.6 km | 17 | 1 | C |
| Cardiff | 10 km | 699 | 14 | A− |
| Pontypridd | 11 km | 85 | 1 | A |
| Newport | 12 km | 226 | 3 | B+ |
| Trelewis | 12 km | 2 | 1 | C+ |
| St Fagans | 14 km | 93 | 1 | — |
Trethomas grades D− for history
Protected heritage and the age of the town’s homes, against all UK towns.
Two measures, each ranked against every UK town of 1,000 or more, with protected heritage counting twice as much as the age of homes. Protected heritage counts each listed building by its grade (Grade I three points, II* two, II one), each scheduled monument and battlefield two, and each registered park or garden by its grade; it is ranked both per 10,000 residents and as a total, so a village with one fine church doesn’t outrank a historic city. The second measure is the share of homes built before 1919, from the Valuation Office Agency’s council tax records. History is a character grade: it describes the town and isn’t part of the overall grade.
Trethomas in brief
Nothing in Trethomas is on the list; the nearest place with Grade I buildings is Caerphilly, 4.6 km away. Otherwise the figures are ordinary: 11% of its homes were built before 1919, close to the 15% in the typical UK town.
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.