Merrion Court Granary Range and Mill is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 8 December 1995. House.

Merrion Court Granary Range and Mill

WRENN ID
frozen-cinder-summer
Grade
II
Local Planning Authority
Pembrokeshire Coast National Park
Constituency
Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
Country
Wales
Date first listed
8 December 1995
Type
House
Address
Merrion Court Granary Range and Mill, Warren, Castlemartin
OS grid reference
SR 937 972
Coordinates
51.63599, -4.98114
Source
Cadw listing

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

Description

Merrion Court Granary Range and Mill is an early 19th-century granary building that stands two storeys high, constructed from rubble limestone masonry arranged in approximately 0.6-meter courses, topped with a slate roof. The building features a symmetrical design with a central pediment and a set of four cart-shed arches that are now blocked. Above these arches is a granary door with a half-round arched head made of projecting voussoirs, flanked by two square windows with flat voussoir heads, positioned just outside the reach of the pediment. An iron weather vane sits at the apex of the roof.

To the left of the lower storey, there is a cowshed that is connected to a later cowshed located along the roadside. Additionally, there is a horse-gin extension on the front, slightly right of the center, measuring about 10 meters wide by 9 meters deep. A large beam runs across this extension from north to south, crudely scarfed, to support the top journal of a vertical axle, which is visible in the side of the beam.

At the eastern end of the building, there is a return wing that houses a single-stone corn mill. The primary power source for the mill is a breast-fed water wheel, approximately 3.6 meters in diameter and about 1.5 meters wide, located in the basement. A culverted leat runs from the north, and a culverted tailrace exits into the field to the south. This structure represents a fine early example of integrated model agricultural buildings on a tenant holding within the Stackpole Estate.

Local climate

Merrion Court Granary Range and Mill sits in a wetter-than-average part of the UK, with an average of 1,140 mm of rain a year. This makes it wetter than 89% 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 2 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows 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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