Old Rosedew House is a Grade II listed building in the Vale of Glamorgan local planning authority area, Wales. First listed on 20 November 1974. House.

Old Rosedew House

WRENN ID
pale-corbel-rush
Grade
II
Local Planning Authority
Vale of Glamorgan
Constituency
Vale of Glamorgan MP: Kanishka Narayan (Lab)
Country
Wales
Date first listed
20 November 1974
Type
House
Address
Old Rosedew House, Llantwit Major, Cowbridge / Y Bont-Faen
OS grid reference
SS 967 682
Coordinates
51.40343, -3.48587
Source
Cadw listing

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

Description

Old Rosedew House is a two-storey building featuring local rubblestone walls with rendered cladding and Welsh slate gabled roofs, topped with three chimneys. The house has a single depth layout, with a later higher addition that was formerly a granary at the south end, which has higher eaves and ridge. A stone stack has been built up in brick on the north side. The east elevation of the main house includes a 2-light casement window on the upper floor.

The low wing of the east elevation shows that the first and second bays are part of Rosedew, followed by a 2-light wood casement window with small panes on both the ground and first floors, located beyond the stone stack. To the south of the end brick stack, there is a smaller 2-light window on the ground floor and a single light window on the first floor.

Adjoining the north end of the house is a former barn, which has its east elevation visible from the south end. This elevation features a small boarded loft doorway, a blocked deep segmental doorway, another small boarded loft doorway, and a window. The rear (west) elevation has not been seen.

The interior of Old Rosedew House was not observed during the resurvey. It is believed to consist of a hall and inner room, which may represent the original three-room plan, with an extension into the barn at the north end. The interior is said to contain a fireplace at both the south end and in the centre, arched stopped and chamfered stone doorways, including one between the north and south rooms, and a 'cross-passage' doorway in the west elevation. There are also stopped and chamfered beams, and a former partition between the middle and north rooms. These features are supported by the Royal Commission on the Ancient and Historical Monuments of Wales, which indicates a plan showing a mural stair and the walls broken through at either end into the former barn and outhouse.

Local climate

Old Rosedew House sits in one of the wettest parts of the UK, with an average of 1,170 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% 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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  • Detailed attributes — period, style, materials, features
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  • 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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