Tan-y-Marian is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 14 December 1961. Cottages.
Tan-y-Marian
- WRENN ID
- guardian-basalt-auburn
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 14 December 1961
- Type
- Cottages
- Address
- Tan-y-Marian, 21 Gwynant Street, Beddgelert, Caernarfon, Gwynedd
- OS grid reference
- SH 592 482
- Coordinates
- 53.01293, -4.10017
- Source
- Cadw listing
Description
Tan-y-Marian is a terrace of workman's cottages located at Nos 18-21 Gwynant Street, built in the second quarter of the 19th century. This two-storey terrace is constructed from roughly-squared stone blocks and features a continuous slate roof with a tiled ridge and plain, shared chimneys. Each cottage has a single window, with returned slate labels and slate lintels above the ground floor windows. All the doors are from the 20th century. Among the ground floor windows, number 18 retains the original 16-pane sash window, while numbers 18 and 19 have smaller 19th-century 16-pane sash windows under the eaves; the other windows have been replaced with modern versions. This terrace is part of a group of four cottages.
Local climate
Tan-y-Marian sits in one of the wettest parts of the UK, with an average of 1,500 mm of rain a year. This makes it wetter than 98% 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 32 freeze-thaw cycles a year, fewer than 58% of listed buildings. Of these, 16 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
- No sale records on file
- No related consent applications matched
- 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
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