II*Church · listed 1968St Rhedyw's ChurchOn the list as Church of St RhedywPhoto: Jaggery · CC BY-SA 2.0
Photo: David Medcalf · CC BY-SA 2.0–Not graded
History of Llanllyfni · Cadw
Old homes in Llanllyfni: 65% built before 1919
For Llanllyfni, that is 4 times the typical town’s share, 15%. Cadw lists 4 buildings inside Llanllyfni’s built-up area, 114 for every 10,000 residents.
Listed buildings
4
114 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
65%
typical UK town 15%
In pictures
Landmarks of Llanllyfni
Nearly every Grade I and II* building, photographed. Tap a photo to step through them full screen.
Photos 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 Llanllyfni’s history is
Every Grade I and II* building, monument and historic park.
Grade II*
Hover a dot for its name; tap one with a photo to open it.
4 listed buildings by grade
0 Grade I1 Grade II*3 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 II*
The Grade II* listed building in Llanllyfni
Particularly important buildings of more than special interest. Every one is photographed. Each opens its own page, with the official list entry.
Grade II
3 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 3 Grade II listed buildings, A to Z
Homes by age
65% of Llanllyfni’s homes were built before 1919
Every home by when it was built, from council tax records, against England & Wales (the dark tick).
62%
Before 1900
3.4%
1900–18
1.1%
1919–29
10%
1930s
6.3%
1945–54
1.1%
1955–64
4.6%
1965–72
2.9%
1973–82
1.1%
1983–92
1.1%
1993–99
2.9%
2000–08
2.9%
2009–15
0%
2016–25
LlanllyfniEngland & Wales
62% of homes are Victorian or older, against 16% across England and Wales. The busiest period since was the 1930s, which added 10% 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 Llanllyfni
| Town | People | Listed | Grade I | History |
|---|---|---|---|---|
| Llanllyfni | 352 | 4 | 0 | — |
| Penygroes | 1,793 | 8 | 0 | B |
| Caernarfon | 9,831 | 250 | 7 | A+ |
| Llanrug | 1,537 | 0 | 0 | C− |
| Llanberis | 1,838 | 13 | 0 | A− |
| Criccieth | 1,737 | 29 | 0 | A |
| Bethel | 1,091 | 4 | 0 | B− |
| Clwt-y-bont | 1,385 | 2 | 0 | B− |
In brief
Llanllyfni in brief
Old houses are part of Llanllyfni’s character: 65% of its homes were built before 1919, against 15% in the typical UK town. All told, the list holds 4 listed buildings. Otherwise the figures are ordinary: R. Silyn Roberts (1871) was born here before 1900; and the list grew between 1968 and 2000.
Questions about Llanllyfni’s history
How many listed buildings are there in Llanllyfni?
Cadw lists 4 buildings inside Llanllyfni’s built-up area: 0 Grade I, 1 Grade II* and 3 Grade II.
How old are the homes in Llanllyfni?
65% of homes were built before 1919 and 76% before 1940, from the Valuation Office Agency’s council tax records (March 2025).
Llanllyfni 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.