IHouse · listed 1951Llancaiach FawrOn the list as Llancaiach-fawrPhoto: Rose Cottage · Public domain
Llancaiach-fawr · Photo: Rose Cottage · Public domainC+History Grade
History of Trelewis · Cadw
2 listed buildings, 1 of them Grade I
On the Cadw list, all of them stand inside Trelewis’s built-up area, 9.9 for every 10,000 residents. 34% of its homes were built before 1919. Trelewis grades C+ for history.
Listed buildings
2
9.9 per 10,000 residents
Grade I
1
exceptional interest
Grade II*
0
more than special interest
Scheduled monuments
0
nationally important sites
Homes built before 1919
34%
typical UK town 15%
The map
Where Trelewis’s history is
Every Grade I and II* building, monument and historic park.
Grade I
Hover a dot for its name; tap one with a photo to open it.
2 listed buildings by grade
1 Grade I0 Grade II*1 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.
Grade I
The Grade I listed building in Trelewis
Buildings of exceptional interest, about 1.6% of all listed buildings. Every one is photographed. Each opens its own page, with the official list entry.
Grade II
1 Grade II listed building
Most listed buildings are in this grade, which covers buildings of special interest. Open any building to read its official list entry.
All 1 Grade II listed buildings, A to Z
History Grade
Trelewis 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 (4 points, 20 per 10,000 residents)More than 25% of UK towns
Homes built before 1919 (34%)More than 89% of 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.
Homes by age
34% of Trelewis’s homes were built before 1919
Every home by when it was built, from council tax records, against England & Wales (the dark tick).
31%
Before 1900
1.9%
1900–18
12%
1919–29
0.9%
1930s
2.8%
1945–54
14%
1955–64
8.6%
1965–72
0.9%
1973–82
3.9%
1983–92
2.8%
1993–99
0.9%
2000–08
13%
2009–15
5.7%
2016–25
TrelewisEngland & Wales
31% of homes are Victorian or older, against 16% across England and Wales. The busiest period since was 1955–64, which added 14% 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.
Towns its size
Trelewis has the 90th most Grade I buildings of 1,490 towns its size
Places of 1,000–3,000 people outside London, by Grade I listed buildings.
Trelewis1
#1,219 of 1,490for listed buildings per resident (10 per 10,000). Burford, Lavenham and Painswick lead.
89 have more. The typical town its size has 0.
Neighbours
Listed buildings in the places around Trelewis
In brief
Trelewis in brief
More of Trelewis’s homes are old than in most places: 34% were built before 1919, against 15% in the typical UK town. In all there are 2 listed buildings, 1 of them Grade I. Only 89 of the 1,490 towns nearest its size have more Grade I buildings. Beyond that, per resident it sits near the middle of UK towns; and the list grew between 1951 and 2001.
Questions about Trelewis’s history
How many listed buildings are there in Trelewis?
Cadw lists 2 buildings inside Trelewis’s built-up area: 1 Grade I, 0 Grade II* and 1 Grade II.
What are the Grade I listed buildings in Trelewis?
One: Llancaiach-fawr.
How old are the homes in Trelewis?
34% of homes were built before 1919 and 47% 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.