Photo: Dot Potter · CC BY-SA 2.05 listed buildings
Cadw counts them inside Trelogan’s built-up area, 80 for every 10,000 residents. It also has 1 scheduled monument. 39% of its homes were built before 1919.
Where Trelogan’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
Monuments, parks and gardens
Designations that overlap the town by a tenth of their area or half a hectare.
1 scheduled monument
Nationally important archaeological sites and monuments, protected by law; work on them needs consent from the Welsh Government (Cadw).
39% of Trelogan’s homes were built before 1919
Every home by when it was built, from council tax records, against England & Wales (the dark tick).
36% of homes are Victorian or older, against 16% across England and Wales. The busiest period since was 1973–82, which added 13% of today’s homes.
Valuation Office Agency, council tax stock of properties by build period, 31 March 2025, for the neighbourhoods (LSOAs) that make up the town, split by where their residents live. Homes with no recorded build period (0 here) are left out; 1939–44 is not a period in the data.
Listed buildings in the places around Trelogan
Trelogan in brief
Old houses are part of Trelogan’s character: 39% of its homes were built before 1919, against 15% in the typical UK town. All told, the list holds 5 listed buildings. Beyond that, all its entries went on the list in 2001; and it also has a scheduled monument.
Questions about Trelogan’s history
How many listed buildings are there in Trelogan?
Cadw lists 5 buildings inside Trelogan’s built-up area: 0 Grade I, 0 Grade II* and 5 Grade II.
Are there scheduled monuments in Trelogan?
Yes, 1 scheduled monument, including Berthen-Gam Round Barrow.
How old are the homes in Trelogan?
39% of homes were built before 1919 and 46% before 1940, from the Valuation Office Agency’s council tax records (March 2025).
Trelogan 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.