Quarry Offices is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 21 July 2000. Office.
Quarry Offices
- WRENN ID
- waiting-jade-bracken
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 21 July 2000
- Type
- Office
- Address
- Quarry Offices, Pen-Yr-Orsedd, Caernarfon, Llanllyfni
- OS grid reference
- SH 509 537
- Coordinates
- 53.06033, -4.22532
- Source
- Cadw listing
Description
The Quarry Offices is a single-storey T-plan office building. The earlier section, which is the cross-wing to the west, is aligned approximately north-south, while the later section to the east is aligned roughly east-west. The later range features doors at both the front and back, allowing workers to enter and exit as they collected their wages. The building is constructed of coursed slate rubble, with the earlier cross-wing showing remnants of render and likely later slate hanging, while the later range includes some red brick dressings. It has gable-ended slate roofs with brick stacks. The front cross-wing has a 12-paned sash window, and the later range contains three 6-paned sash windows. Original plaster finishes are still intact.
Local climate
Quarry Offices 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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- 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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