II*Church · listed 1999Elim Pentecostal ChurchPhoto: Jaggery · CC BY-SA 2.0
Bethania Independent Chapel · Photo: GeraintTudur2 · CC BY-SA 3.0B−History Grade
History of Mountain Ash · Cadw
Old homes in Mountain Ash: 73% built before 1919
The typical town has 15%: Mountain Ash has 5 times the share. Cadw lists 10 buildings inside Mountain Ash’s built-up area, 7.7 for every 10,000 residents. We have photos of 5 of its listed buildings. Mountain Ash grades B− for history: #10 of 32 in Mid Glamorgan.
Listed buildings
10
7.7 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
73%
typical UK town 15%
In pictures
Mountain Ash in 5 photos
Nearly every Grade I and II* building, photographed. Tap a photo to step through them full screen.
Elim Pentecostal ChurchGrade II* listed
Clock Tower and War MemorialGrade II listed
Mountain Ash Town HallGrade II listed
Church of St MargaretGrade 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 Mountain Ash’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%+
8 of 9neighbourhoods have mostly pre-1919 homes; in the oldest, 99% were built before 1919.
Hover a dot for its name; tap one with a photo to open it.
10 listed buildings by grade
0 Grade I1 Grade II*9 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 Mountain Ash
Particularly important buildings of more than special interest. Every one is photographed. Each opens its own page, with the official list entry.
Grade II
9 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.
How the list grew
4 of Mountain Ash’s 10 listed buildings were added in 2003
The year each building now on the list was first listed.
19501960197019801990200020102020
The first 1 entry was listed in 1988. 4 came in 2003. Only 0 have been added in the last 15 years.
History Grade
Mountain Ash grades B− for history
Protected heritage and the age of the town’s homes, against all UK towns.
Protected heritage, for its size and in all (11 points, 8 per 10,000 residents)More than 27% of UK towns
Homes built before 1919 (73%)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
73% of Mountain Ash’s homes were built before 1919
Every home by when it was built, from council tax records, against England & Wales (the dark tick).
53%
Before 1900
20%
1900–18
2.7%
1919–29
0%
1930s
2.1%
1945–54
1.9%
1955–64
10%
1965–72
2.1%
1973–82
1.7%
1983–92
3.3%
1993–99
1.1%
2000–08
0.2%
2009–15
1.7%
2016–25
Mountain AshEngland & Wales
53% of homes are Victorian or older, against 16% across England and Wales. The busiest period since was 1900–18, which added 20% 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.
Born here
4 notable people born in Mountain Ash before 1900
Their lives on one timeline, earliest first.
Will Osborne
William Jones
George Henry Hall, 1st Viscount Hall
Jack Bailey
18501875190019251950
GH
George Henry Hall, 1st Viscount Hall1881–1965 · British politician (1881-1965)
WJ
William Jones1876–1918 · Welsh footballer (1876-1918)
WO
Will Osborne1875–1942 · Welsh rugby union and rugby league footballer
JB
Jack Bailey1898–1969 · Welsh co-operative activist and politician (1898-1969)
Everyone born in Mountain Ash → Birthplaces from Wikidata; portraits from Wikimedia Commons.
Neighbours
Listed buildings in the places around Mountain Ash
In brief
Mountain Ash in brief
More of Mountain Ash’s homes are old than in most places: 73% were built before 1919, against 15% in the typical UK town. All told, the list holds 10 listed buildings, including Elim Pentecostal Church. George Henry Hall, 1st Viscount Hall (1881), William Jones (1876) and Will Osborne (1875) are among the 4 people born here before 1900. The rest is about typical: like most towns its size, it has no Grade I building; and per resident it sits near the middle of UK towns.
Questions about Mountain Ash’s history
How many listed buildings are there in Mountain Ash?
Cadw lists 10 buildings inside Mountain Ash’s built-up area: 0 Grade I, 1 Grade II* and 9 Grade II.
When were Mountain Ash’s buildings listed?
The first in 1988; the most, 4, in 2003.
Who was born in Mountain Ash?
Among people born before 1900: George Henry Hall, 1st Viscount Hall (1881), William Jones (1876), Will Osborne (1875) and Jack Bailey (1898).
How old are the homes in Mountain Ash?
73% of homes were built before 1919 and 75% 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.