Barn at Maindiff Farm is a Grade II listed building in the Monmouthshire local planning authority area, Wales. First listed on 5 February 1998. Barn.
Barn at Maindiff Farm
- WRENN ID
- stubborn-cupola-cream
- Grade
- II
- Local Planning Authority
- Monmouthshire
- Constituency
- Monmouthshire MP: Catherine Fookes (Lab)
- Country
- Wales
- Date first listed
- 5 February 1998
- Type
- Barn
- Address
- Barn at Maindiff Farm, Abergavenny, Llantilio Pertholey
- OS grid reference
- SO 312 151
- Coordinates
- 51.83033, -2.99899
- Source
- Cadw listing
Description
The barn at Maindiff Farm is a Grade II listed structure built from roughly squared red sandstone rubble, featuring some red brick dressings and a Welsh slate roof. It has central opposed doors with a large gabled porch on the outside, which includes diagonally boarded doors, while the yard side has plain double doors. The Victorian end of the barn displays three long vertical slits on either wall, along with an additional slit beyond the doors that are divided in two for the tallet. Any earlier openings in the walling are now blocked. The Victorian gable end features a large elliptically headed window measuring 3 by 4 feet, with a slit vent below, which likely served as a taking-in door to the tallet.
Inside, the barn is very spacious, consisting of nine bays. At one end, there are two principal rafter trusses that are probably from the 18th century, while the other six are machine-sawn Victorian Queen post trusses with iron straps. The structure includes two tiers of staggered purlins and secondary rafters, which are likely all from the late 19th century.
Local climate
Barn at Maindiff Farm receives an average of 960 mm of rain a year. This makes it wetter than 74% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 71% of listed buildings.
It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 22 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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- Carriage House at Maindiff Farm
- Maindiff Farmhouse
- Mill House
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- Octagonal Shelter 4 in the grounds to north of Pen-y-fal
- Octagonal Shelter 3 in the grounds to south of Pen-y-fal
- Octagonal Shelter 5 in the grounds to north of Pen-y-fal
- Saxonbury Nursing Home (formerly Haverang House)
- Octagonal Shelter 2 in the grounds to south of Pen-y-fal
- Parc Pen-y-fal (former main hospital building)