Quarry Hospital is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 21 July 2000. Hospital.

Quarry Hospital

WRENN ID
small-stair-dock
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
21 July 2000
Type
Hospital
Address
Quarry Hospital, Pen-Yr-Orsedd, Caernarfon, Llanllyfni
OS grid reference
SH 509 537
Coordinates
53.06018, -4.22512
Source
Cadw listing

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

Description

Quarry Hospital is a single-storey building with a rectangular plan, oriented roughly from north-west to south-east. It features a gabled projection at the center of the front. The structure is built of uncoursed rubblestone with red brick dressings and has gable-ended slate roofs, although many slates were missing at the time of the survey. A central brick stack is present. The lower central gabled projection includes a pair of door openings and a small 2-light window above. On either side of the gable, there are two windows, each with a 2-light casement and brick reveals. Much of the original plasterwork inside the building remains intact.

Local climate

Quarry Hospital sits in one of the wettest parts of the UK, with an average of 1,380 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 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 12 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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