Former Mumbles Railway Electricity Sub-Station is a Grade II listed building in the Swansea local planning authority area, Wales. First listed on 11 February 1998. Electricity sub-station. 2 related planning applications.

Former Mumbles Railway Electricity Sub-Station

WRENN ID
seventh-pillar-moon
Grade
II
Local Planning Authority
Swansea
Constituency
Gower MP: Tonia Antoniazzi (Lab)
Country
Wales
Date first listed
11 February 1998
Type
Electricity sub-station
Address
Former Mumbles Railway Electricity Sub-Station, Blackpill, SA3 5AS
OS grid reference
SS 619 905
Coordinates
51.59703, -3.995
Source
Cadw listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

This is a former electricity sub-station, dating from the period of the Mumbles Railway. It is constructed of brown brick with concrete dressings and has a flat roof concealed behind a plain parapet. The building has round-arched windows with an impost band and small-pane metal glazing incorporating marginal lights. Five windows face the road to the west, while a doorway with a missing hood and a louvred vent are located on the left-hand end. The south end wall features two lunettes and a broad doorway on the left. A six-bay Tuscan portico faces the sea, above which are two lunettes, and the parapet is inscribed with the words 'Blackpill’ in raised lettering. The north elevation contains two lunettes. The machinery has been removed, but the interior retains a tiled floor and I-beams supporting the ceiling.

Local climate

Former Mumbles Railway Electricity Sub-Station sits in one of the wettest parts of the UK, with an average of 1,380 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 14 freeze-thaw cycles a year, fewer than 87% of listed buildings. Of these, 5 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 4 transactions since 1996
  • Related listed building consents — 2 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
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