Former Mount Calvary Baptist Chapel is a Grade II listed building in the Swansea local planning authority area, Wales. First listed on 23 July 1999. Chapel.

Former Mount Calvary Baptist Chapel

WRENN ID
forbidden-oriel-gorse
Grade
II
Local Planning Authority
Swansea
Constituency
Neath and Swansea East MP: Carolyn Harris (Lab)
Country
Wales
Date first listed
23 July 1999
Type
Chapel
Address
Former Mount Calvary Baptist Chapel, St Thomas, St. Thomas
OS grid reference
SS 675 933
Coordinates
51.62353, -3.91441
Source
Cadw listing

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

Description

The Former Mount Calvary Baptist Chapel is a late Gothic style building constructed from coursed rock-faced sandstone with limestone ashlar dressings and slate roofs. It features a gable front with a porch tower on the left and a hipped stair wing on the right. The chapel has a basement and two storeys.

The main gable displays four rectangular basement windows below a plinth, and four rectangular ground floor windows framed in ashlar, which are flat-headed with recessed ogee heads. A sill band runs beneath a large pointed, ornately traceried five-light window, above which is an ashlar band in the gable topped with a cross finial. To the right, a thin octagonal turret with ashlar quoins has a blank panelled section below the gable level and a similar turret above with an ogee domed cap and cross finial. The right wing features a broad basement door with an ashlar flat lintel and incised tracery, as well as an ashlar eaves window band with inset shaped heads to the lights, which include two lights on the front, one on the canted side, and one on the south end. The canted hipped roof is steep.

The tower on the left has two-stage clasping buttresses leading up to a deep parapet with panelled ashlar corner piers and a recessed steep slate pyramid roof. There are steps leading up to a broad segmental arched doorway with chamfered jambs and a moulded head. Above this is a band under a first-floor rectangular ashlar light with inset tracery, and a cambered-headed broad traceried five-light window. The north side mirrors this design but features two rectangular ashlar windows on the ground floor.

The five-bay north side includes a basement, three-step buttresses, and rectangular ashlar windows with quoined jambs and flush sill bands. The south side is similar but has yellow-brick window frames.

During the conversion to flats, most windows were reglazed with timber windows, retaining the leaded lights of the main and tower windows. The front door has also been replaced.

Inside, the ornate interior with curved-fronted cast-iron galleries has been significantly altered due to the insertion of flats, although some roof trusses are still visible in the inner hall.

Local climate

Former Mount Calvary Baptist Chapel sits in one of the wettest parts of the UK, with an average of 1,400 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 97% of listed buildings.

It experiences an average of 21 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 8 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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