Barn at Eglwys Nunydd is a Grade II listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 12 November 1952. House. 2 related planning applications.

Barn at Eglwys Nunydd

WRENN ID
open-tallow-sedge
Grade
II
Local Planning Authority
Neath Port Talbot
Constituency
Aberafan Maesteg MP: Stephen Kinnock (Lab)
Country
Wales
Date first listed
12 November 1952
Type
House
Address
Barn at Eglwys Nunydd, Water Street, Margam, SA13 2TF
OS grid reference
SS 803 849
Coordinates
51.55027, -3.72773
Source
Cadw listing

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

Description

The barn at Eglwys Nunydd is a large, symmetrical structure built from rubble stone, featuring seven bays and massive battered walls. It has a corrugated asbestos roof. The central cart-passage is flanked by a gabled porch on the south side, which has a slate roof. There is a full-height entrance with a timber lintel and a blocked ventilation slit at the gable apex. Additional ventilation slits are located immediately to the right of the porch and at the far left. The east gable end contains two ventilation slits and another in the gable apex. On the north side, there is a central doorway with a timber lintel and red brick jambs. The west gable end features a central square opening that was once a loft hatch, with two socket holes below it that likely supported the former loft. There are also two ventilation slits on the ground floor near the exterior walls.

Inside, the barn has simple tie beam trusses with three purlins on each side. The jambs of the porch slightly project inward and support the central pair of tie beams. The floor is made of earth. The ventilation slits have splayed openings, and there were originally two on each side of the front porch. There is a blocked square opening in the east gable that would have matched the one on the west end.

Local climate

Barn at Eglwys Nunydd sits in one of the wettest parts of the UK, with an average of 1,220 mm of rain a year. This makes it wetter than 92% 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 23 freeze-thaw cycles a year, fewer than 76% of listed buildings. Of these, 9 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
  • 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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