E Farmyard Range including water-wheel at Nant Farm

E Farmyard Range, including the water-wheel at Nant Farm, is a linear group of single-storey farm buildings attached to the service range at the south end of the farmhouse. Constructed from granite rubble stone with slate roofs, this range is part of an L-plan layout that includes a stable, mill-room, wheel-pit, and barn, all facing west in line with the house. The north-facing cow-house and cart shed are listed separately.

The buildings feature granite rubble walls and slated gabled roofs with shallow eaves. The stable has a window, door, and another window under the eaves, with the windows displaying the typical Glynllifon Estate design of a slatted or boarded lower half and small-paned upper half. In the center of the range, there is a low door leading to the mill-room. The barn to the right has a tall boarded door in the center and two loops to the right. The mill tail-race is culverted under the farmyard.

Inside the barn, there is a threshing floor with stone flags on each side and two rear doors, one of which leads to the mill-room. The barn features a 3-bay roof with some replaced timbers. There is a boarded door to the wheel-pit, with a race channelled from the mill pond at the rear. The overshot water wheel, equipped with timber buckets and located in the cross-passage, drives a shaft that projects through the barn wall and along its full length, with pulleys that operate threshing and winnowing machines, controlled by a lower wheel. The stables include boxes for three horses, complete with fittings and a cobbled floor. There is a boarded partition with the mill-room and a connecting door, as well as a stone flagged floor and loft above. The water wheel machinery consists of two toothed wheels and a gear lever, while the gorse mill has been removed.