Engine House & Accumulator Tower is a Grade II listed building in the Carmarthenshire local planning authority area, Wales. First listed on 17 February 1986. Engine house.
Engine House & Accumulator Tower
- WRENN ID
- mired-banister-moth
- Grade
- II
- Local Planning Authority
- Carmarthenshire
- Constituency
- Llanelli MP: Dame Nia Griffith (Lab)
- Country
- Wales
- Date first listed
- 17 February 1986
- Type
- Engine house
- Address
- Engine House & Accumulator Tower, Llanelli
- OS grid reference
- SS 499 997
- Coordinates
- 51.67631, -4.17102
- Source
- Cadw listing
Description
The Engine House and Accumulator Tower is a Grade II listed building constructed from rubble stone, featuring ashlar dressings on the tower and the north facade, with slate roofs that have mostly been replaced with corrugated iron. The structure consists of three parallel sheds, with the tower located at the north end of the east shed.
The tower has a high base with a cambered-headed doorway on the north side, leading to a two-stage main storey that is supported by five flat buttresses on each face, including a pair at the corners and one in the center. A date stone from 1900 is located at the base of the center buttress on the north side. There are pairs of louvred vents on either side of the center buttress at mid-height, and a string course at two-thirds height, with the buttresses terminating in set-offs midway up the second stage. Another string course runs beneath a high embattled parapet, which features outer battlements that are stepped up. The interior of the tower is open to the sky and contains a large iron cylindrical water tank.
To the right of the tower is the coped gable of the center shed, which has a blocked low brick arch that was formerly connected to a detached chimney. The west shed projects to the right and has a coped shouldered north gable with a large cambered arched entry that is now blocked. The west side wall features three ashlar cambered-headed windows with tooled quoins, voussoirs, and sills, topped by a stepped eaves cornice. An added brick range to the south incorporates some stone walling from an earlier range, with three cambered-headed windows and doors at the south end.
The east shed, located behind the tower, is believed to have served as the engine house, while the center shed functioned as the boiler house and the west shed was used for maintenance. The east shed has paired coped gables, both featuring ashlar voussoirs above cambered arched entries on the south end. The original roofs have been removed and replaced at a lower level with corrugated iron. The east side of the east shed includes two cambered-headed windows with ashlar voussoirs and sills, and there is a corrugated iron shed at the northeast angle on a rubble stone base, projecting forward of the tower.
The interiors have not been seen but are reported to retain an inspection pit and hydraulic equipment.
Local climate
Engine House & Accumulator Tower sits in one of the wettest parts of the UK, with an average of 1,430 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 10 freeze-thaw cycles a year, fewer than 91% 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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- 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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