U-Plan Farm Group at Trevor Hall Farm

U-Plan Farm Group at Trevor Hall Farm is a stone-built complex designed in an asymmetrical U-plan, with the southern side being shorter. The building features dressed stone quoins and voussoirs, and is topped with hipped slate roofs that have slightly overhanging eaves. The uphill range includes four gabled timber ridge ventilators, while the downhill range has two circular ridge cowls. Both the western and downhill ranges are adorned with ridge cresting.

The gable end of the uphill range showcases a distinctive circular window framed with dressed stone. This section, which includes a two-window stable and hayloft block, is a later 19th-century enlargement, as indicated by the masonry break and the engineering brick voussoirs above the camber-headed ground floor openings, including a central doorway. To the left, there are additional cowsheds that were converted from a former cartshed, evident from the broad cambered stone-voussoired opening, which has been infilled. Above this opening, there are four rows of doveboxes.

The western range, which encloses the farmyard, features an unusual off-centre projecting gable with a deep timber hood over the loading platform in front of the hayloft doorway. This platform appears to have been enclosed on the sides but lacks an external staircase. There is also a lateral stone chimney stack, suggesting former domestic use, along with an inserted lean-to on the right. The shorter downhill range may have originally provided accommodation for farm workers in the 19th century, as the regular ground floor fenestration is larger than what would be needed for animals. Both the gable end and the southern side have small-pane casement windows. At the eastern end, there is an added range with a blocked doorway on the outer side. The rear of the building features slit ventilators, and the western range has barn doors.

The western part of the complex, likely the former farmhouse, retains some broadly chamfered and tongue-stopped beams. The chimney stack has a domestic stone-linteled fireplace at its base on the downhill side, which is now blocked.