Okeltor Mine Buildings is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 19 October 1987. Industrial. 3 related planning applications.
Okeltor Mine Buildings
- WRENN ID
- tall-cellar-sunrise
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- South East Cornwall MP: Anna Gelderd (Lab)
- Country
- England
- Date first listed
- 19 October 1987
- Type
- Industrial
- Address
- Okeltor Mine Buildings, Calstock, PL18 9SQ
- OS grid reference
- SX 444 689
- Coordinates
- 50.49938, -4.19478
- Source
- Historic England listing
Description
The Okeltor Mine buildings date from the mid to late 19th century and are located on the upper bank of the River Tamar, opposite Gawton in Devon. The mine complex, which produced lead, copper, tin, and arsenic, consists of several structures including an engine house with a chimney approximately 30 metres to the northwest, a count house, and a smithy.
The engine house is rectangular and built of slatestone rubble with brick dressings, featuring arched openings with brick detailing. A bob wall stands to the south. A section of the cylinder plinth, constructed of two wide granite stones, remains in the centre. The engine house originally housed a 50-inch cylinder draught engine, operating 75 fathoms of 12-inch plunger lifts and 15 fathoms of 12-inch drawing lifts, installed in 1864. The circular, tapered chimney is constructed of rubble with a brick top and cornice.
The count house is a single-story structure with a hipped slate roof, featuring a window to the front and a door on the side. Adjacent is the single-story smithy, with a corrugated iron roof and an open front.
Further buildings on the site include a dry, boilerhouse, crusher, a whim engine house, a Brunton calciner, stamps, buddles, the remains of arsenic labyrinths, and an arsenic chimney. This was a significant mine near Calstock, boasting a quay capable of accommodating vessels up to 200 tons. The main engine shaft extended to 80 fathoms below the level of the Tamar, with the main copper load passing under the river into Gawton mine in Devon. The mine ceased operations in 1887.
Local climate
Okeltor Mine Buildings sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 81% of listed buildings.
It experiences an average of 17 freeze-thaw cycles a year, fewer than 84% of listed buildings. Of these, 7 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
Sign in or create a free account to unlock:
- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 2 transactions since 2023
- Related listed building consents — 3 applications
- 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.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
this building 1 similar nearby listed buildings