Primary House at Llam-y-Lleidr is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 21 June 2001. House.

Primary House at Llam-y-Lleidr

WRENN ID
twisted-screen-vale
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
21 June 2001
Type
House
Address
Primary House at Llam-y-Lleidr, Harlech, Gwynedd
OS grid reference
SH 593 320
Coordinates
52.86748, -4.09132
Source
Cadw listing

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

Description

Llam-y-Lleidr is a single-storey house and byre, featuring a primary cottage at the downhill end and a single-bay byre section at the uphill end, with a later cart bay stepped up beyond. The building is constructed of local rubble, with the front elevation of the house section (northeast) showing residual whitening. It has medium-steep old slate roofs, while the rear pitch of the house section is covered with corrugated iron. The house has a squat end chimney on the left and a near-centre entrance at the front, which features a recessed boarded door. To the left of the entrance is a small, square primary window with 20th-century plain glazing. The byre section includes a deeply-recessed boarded door on the right and 20th-century boarded doors for the cart bay. The interior was not inspected during the survey.

Local climate

Primary House at Llam-y-Lleidr sits in one of the wettest parts of the UK, with an average of 1,490 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 97% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 60% of listed buildings. Of these, 15 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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  • 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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