Assembly shop at former Union Ironworks is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 3 May 2002. Workshop.
Assembly shop at former Union Ironworks
- WRENN ID
- watchful-obsidian-flax
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 3 May 2002
- Type
- Workshop
- Address
- Assembly shop at former Union Ironworks, Caernarfon
- OS grid reference
- SH 480 624
- Coordinates
- 53.13749, -4.27254
- Source
- Cadw listing
Description
The assembly shop at the former Union Ironworks is a single-storey, square-shaped workshop built in brick, featuring five bays and a flat roof that has been replaced, set behind a coped parapet that has been partly rebuilt. The central bay is wider and includes a doorway topped by a large radial-glazed overlight. The outer bays contain round-headed windows that are recessed within round-headed bays, adorned with bullnose dressings, and fitted with small-pane iron-framed glazing.
On the right end wall, there is a single-storey added lean-to, above which are five windows arranged in groups of three and two, set within arched bays similar to those on the front. The left end wall mirrors this design, featuring an upper tier of windows grouped in twos and threes. At ground level, there are two blocked, wide cambered openings with brick voussoirs supported on iron plates at the soffit, which originally led to attached ironworks buildings that have since been demolished.
Additionally, there is a lower brick gabled rear wing topped with a corrugated asbestos-cement roof.
Local climate
Assembly shop at former Union Ironworks sits in one of the wettest parts of the UK, with an average of 1,370 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 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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