II*Public · listed 1996Parc and Dare HallOn the list as Park and Dare Workmen's Institute and HallPhoto: Nigel Davies · CC BY-SA 2.0
Railway footbridge · Photo: Jaggery · CC BY-SA 2.0C+History Grade
History of Treorchy · Cadw
Old homes in Treorchy: 83% built before 1919
For Treorchy, that is 6 times the typical town’s share, 15%. Cadw lists 5 buildings inside Treorchy’s built-up area, 6.5 for every 10,000 residents. We have photos of 4 of its listed buildings. Treorchy grades C+ for history: #15 of 32 in Mid Glamorgan.
Listed buildings
5
6.5 per 10,000 residents
Grade I
0
exceptional interest
Grade II*
1
more than special interest
Scheduled monuments
0
nationally important sites
Homes built before 1919
83%
typical UK town 15%
In pictures
Landmarks of Treorchy
Nearly every Grade I and II* building, photographed. Tap a photo to step through them full screen.
Park and Dare Workmen's Institute and HallGrade II* listed
Church of St GeorgeGrade II listed
Bethlehem Eglwys Presbyteraidd Cymru/ Bethlehem Welsh Presbyterian ChapelGrade II listed+1See all photosPhotos from Wikimedia Commons and Geograph, copied to our own server, each credited to its photographer with its licence; names open the building’s page or its official list entry.
The map
Where Treorchy’s history is
Every Grade I and II* building, monument and historic park, over the age of each neighbourhood’s homes.
Grade II*
Homes built before 1919, by neighbourhoodunder 10%10–25%25–50%50%+
5 of 5neighbourhoods have mostly pre-1919 homes; in the oldest, 93% were built before 1919.
Hover a dot for its name; tap one with a photo to open it.
5 listed buildings by grade
0 Grade I1 Grade II*4 Grade II
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. Neighbourhood dots: the population-weighted centre of each Census 2021 output area, coloured by its neighbourhood’s (LSOA’s) share of homes built before 1919 (Valuation Office Agency, March 2025).
Grade II*
The Grade II* listed building in Treorchy
Particularly important buildings of more than special interest. Every one is photographed. Each opens its own page, with the official list entry.
Grade II
4 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.
History Grade
Treorchy grades C+ for history
Protected heritage and the age of the town’s homes, against all UK towns.
Protected heritage, for its size and in all (6 points, 8 per 10,000 residents)More than 20% of UK towns
Homes built before 1919 (83%)More than almost every UK town
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.
Homes by age
83% of Treorchy’s homes were built before 1919
Every home by when it was built, from council tax records, against England & Wales (the dark tick).
50%
Before 1900
34%
1900–18
0.6%
1919–29
0.3%
1930s
2.5%
1945–54
1.7%
1955–64
1.4%
1965–72
0.8%
1973–82
4.4%
1983–92
2.2%
1993–99
0.6%
2000–08
0.6%
2009–15
0.8%
2016–25
TreorchyEngland & Wales
50% of homes are Victorian or older, against 16% across England and Wales. The busiest period since was 1900–18, which added 34% 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.
Neighbours
Listed buildings in the places around Treorchy
| Town | People | Listed | Grade I | History |
|---|---|---|---|---|
| Treorchy | 7,645 | 5 | 0 | C+ |
| Maerdy | 2,843 | 0 | 0 | C |
| Treherbert | 5,427 | 5 | 0 | B− |
| Rhondda | 13,271 | 8 | 0 | B− |
| Ferndale | 4,301 | 3 | 0 | C+ |
| Nant-y-moel | 2,378 | 1 | 0 | C |
| Tylorstown and Pontygwaith | 3,551 | 1 | 0 | C |
| Tonypandy | 17,209 | 7 | 0 | B− |
In brief
Treorchy in brief
More of Treorchy’s homes are old than in most places: 83% were built before 1919, against 15% in the typical UK town. In all there are 5 listed buildings, including Parc and Dare Hall. For its size the list is short: per resident, it has more listed heritage than only 20% of UK towns. The rest is about typical: like most towns its size, it has no Grade I building; Iorwerth Thomas (1895) was born here before 1900; and all its entries went on the list in 1996.
Questions about Treorchy’s history
How many listed buildings are there in Treorchy?
Cadw lists 5 buildings inside Treorchy’s built-up area: 0 Grade I, 1 Grade II* and 4 Grade II.
How old are the homes in Treorchy?
83% of homes were built before 1919 and 84% before 1940, from the Valuation Office Agency’s council tax records (March 2025).
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.