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Powder House

A Grade II Listed Building in Blaenavon, Torfaen

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Latitude: 51.7803 / 51°46'48"N

Longitude: -3.0934 / 3°5'36"W

OS Eastings: 324663

OS Northings: 209631

OS Grid: SO246096

Mapcode National: GBR F2.Z38Z

Mapcode Global: VH79C.BJH3

Plus Code: 9C3RQWJ4+4J

Entry Name: Powder House

Listing Date: 9 February 1995

Last Amended: 9 February 1995

Grade: II

Source: Cadw

Source ID: 15304

Building Class: Domestic

Location: Situated on the north side of Garn Road, to the north-west of Blaenavon.

County: Torfaen

Community: Blaenavon (Blaenafon)

Community: Blaenavon

Locality: Garn-yr-Erw

Built-Up Area: Blaenavon

Traditional County: Monmouthshire

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Probably dates from the second half of the nineteenth century (pre 1880). Built to store explosives, presumably for nearby mining. A rare surviving example of its kind.


Built on a rectangular plan, one storey high, stone built in random rubble construction. The building is set within a stone curtain wall, which survives to its full 2.5m height at its north-east corner. A single opening stands opposite the doorway of the building. The doorway is in the centre of the north gable wall. It has brick jambs and an iron lintel. Three iron tie-bars are at eaves level on the side walls and these clasp a pair of iron, L-section girders. Of the pitched roof, only the timbers survive, with some slates lying nearby.


An inner brick wall runs parallel to the stone outer skin (with doorway in matching location). There is a central drainage channel in the floor. The ceiling is formed as a brick tunnel vault.

Reasons for Listing

Listed for its special interest as a rare surviving example of this building type and for its associations with the local mining industry.

Recommended Books

Other nearby listed buildings

  • II Chain Store
    Situated at the north-east corner of the site, above the track leading up to the balance tower.
  • I Blast Furnaces
    Three extant furnaces and the remains of others, stand in a row on the north-west side of the furnace yard, behind the cast houses.
  • II Calcining Kilns
    Situated at the northern edge of the site, above the Blast furnaces.
  • I Cast House and Foundry
    Situated on the north-western side of the site.
  • II Storage Shed and attached Chimney
    Situated to the south of the cast houses and adjoining the site of the western-most one.
  • I Balance Tower
    Situated at the northern end of the Blaenavon Ironworks site and dominating the complex.
  • II Pay Office
    Situated to the south-west of Stack Square and built against the curtain wall for the site.
  • II Gilchrist Memorial
    Situated in the Blaenavon Ironworks Museum car park at the north end of Blaenavon town and to the south-west of the Ironworks; reached off North Street.

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