Powder House at Sw75353768 is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 24 November 1988. Gunpowder store.

Powder House at Sw75353768

WRENN ID
deep-pewter-bramble
Grade
II
Local Planning Authority
Cornwall
Constituency
Truro and Falmouth MP: Jayne Kirkham (Lab)
Country
England
Date first listed
24 November 1988
Type
Gunpowder store
Address
Powder House at Sw75353768, Cot Hill, Ponsanooth
OS grid reference
SW 753 376
Coordinates
50.19652, -5.14904
Source
Historic England listing

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

Description

The powder house at Ponsanooth, dating from around the mid-19th century, served as a gunpowder store for the former Kennal Vale Gunpowder Works. It is constructed of granite rubble with granite dressings and features a grouted scantle slate roof with gable ends. The building has a rectangular plan, with a doorway located in the middle of each gable end, aligned from southwest to northeast. It is a single-storey structure with simple, unaltered elevations. The only openings are the doorways at each gable end and small ventilators in the side walls, with ledged doors. Inside, the interior remains simple and unaltered, preserving the original roof structure. This powder house is one of a group of three identical buildings.

Local climate

Powder House at Sw75353768 receives an average of 850 mm of rain a year. This makes it wetter than 59% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 84% of listed buildings.

It experiences an average of 7 freeze-thaw cycles a year, fewer than 95% of listed buildings. Of these, 3 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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Nearby listed buildings

  1. Powder House at Sw75343769 Grade II 12 m
  2. Powder House at Sw75333771 Grade II 28 m
  3. Gate Piers and Flanking Walls at Entrance to Former Gunpowder Works at Sw754377 Grade II 71 m
  4. Park Cottage Grade II 99 m
  5. Bridge at SW 7506 3747 Grade II 351 m
  6. The Old Mill Grade II 366 m
  7. Mill at Sw75043747 Grade II 369 m
  8. Mill at Sw75033747 Grade II 389 m
  9. Former Mill Immediately North West of the Mill House Grade II 417 m
  10. Ponsanooth Methodist Church, Including Forecourt Walls, Steps and Gate Piers Grade II* 419 m