Plas-yn-Llan is a Grade II listed building in the Conwy local planning authority area, Wales. First listed on 22 July 1998. House.

Plas-yn-Llan

WRENN ID
gentle-timber-spring
Grade
II
Local Planning Authority
Conwy
Constituency
Bangor Aberconwy MP: Claire Hughes (Lab)
Country
Wales
Date first listed
22 July 1998
Type
House
Address
Plas-yn-Llan, Llanfair Talhaiarn
OS grid reference
SH 927 702
Coordinates
53.21831, -3.60786
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Plas-yn-Llan is a T-shaped building dating from the 19th century, featuring two-and-a-half storeys constructed of rendered and whitened rubble with a slated roof that is half-hipped on the sides. It has two large brick chimneys with simple cornicing at the center. The symmetrical facade has three bays and a central entrance accessed through a single-storey flat-roofed porch from the late 19th century. This porch has plain-glazed sides and a four-panel part-glazed door, supported by corner posts and topped with a simply-moulded cornice.

On either side of the entrance are large single-storey canted bays made of wood with flat roofs, which are later 19th-century additions. Each bay features four-pane Victorian sash windows. The first floor contains three 16-pane unhorned sash windows from the 19th century, each with projecting sills. The outer second-floor bays have similar but smaller windows, while the center has a small marginally-glazed sash window. The three bays are topped with gables that have plain bargeboards, with the central gable being smaller and lower than the flanking ones.

On the right (west) side, there is an angled single-storey addition featuring 16-pane and 6-pane 19th-century windows above. The left (east) side has additional 16-pane sash windows from the 19th century across three floors. At the rear, there is a two-storey wing that includes further 4-pane and 16-pane sash windows. The interior was not inspected during the survey.

Local climate

Plas-yn-Llan sits in a wetter-than-average part of the UK, with an average of 1,010 mm of rain a year. This makes it wetter than 81% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 59% of listed buildings.

It experiences an average of 30 freeze-thaw cycles a year, fewer than 66% 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
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  • 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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