Tan-y-ffynnon is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 28 May 1999. Cottage. 1 related planning application.
Tan-y-ffynnon
- WRENN ID
- outer-forge-frost
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 28 May 1999
- Type
- Cottage
- Address
- Tan-y-ffynnon, Rhos Isaf, Caernarfon, Llanwnda, LL54 7NG
- OS grid reference
- SH 487 575
- Coordinates
- 53.09397, -4.26036
- Source
- Cadw listing
Description
Tan-y-ffynnon is a cottage dating from the 19th century. It has a single-storey, two-room layout with a full-length catslide outshut at the rear and a loft on the right side. There is a lower wash house that is contemporary to the cottage, set back and attached to the left gable end, along with two small lean-tos attached to the outshut. The exterior is constructed of rubblestone, which is roughly dressed and coursed at the front, pebbledashed on the right gable end, and features buttered pointing on the left gable end, rear, and wash house; the lean-tos are partly made of brick.
The symmetrical front of the cottage includes four-paned sash windows with large stone lintels on either side of a central boarded door, which is sheltered by an open gabled timber porch that is accessed by a short flight of steps. There are rendered integral end stacks with chimney pots. The right gable end has a small window to the right of the stack that provides light to the loft. At the rear, there are small four-paned sashes to the right of the two projecting lean-tos, with the left serving as a coal house and the right as a porch, each having a boarded door on the right return; the porch door includes a glazed panel. The wash house features a small four-paned sash window at the front and an integral red brick end stack on the left, with a boarded door at the rear where it meets the cottage.
The main cottage was not accessible during the survey, but the wash house has a pavior floor, a stove, and a wash stand.
Local climate
Tan-y-ffynnon sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- Sale history — 5 transactions since 2000
- Related listed building consents — 1 application
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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