Farmbuildings at Glan-y-mor-isaf

The farm buildings at Glan-y-mor-isaf are a model farm complex dating back to the 18th century, arranged around a cobbled yard. The yard is enclosed on three sides, with open-fronted shelter sheds located in the centre, facing each way onto smaller walled yard areas. The buildings are constructed of regularly coursed rubble stone, with many well-dressed Anglesey limestone blocks, particularly in the barn. The upper section of the barn's east gable end was rebuilt in the mid-20th century using red brick. The roofs are slate, with hipped endings to the cart shelter range and slate copings to the gable ends of the single-storey buildings.

The west range features a two-storey cart shelter/loft range on the left, with three cart bays to the left, the outer ones having segmental-shaped lintels, and a boarded door to the right, which indicates a later extension. There are four eaves openings: an 8-pane/boarded ventilator window, a boarded hatch, another ventilator window, and a 6-paned sash window, all with slate cills. A red brick ridge stack sits to the right. Adjacent is a long, single-storey range with two doorways towards the southern end, one with a boarded door, the other blocked with a ventilator window inserted in the infill.

The north range includes a barn to the right, which continues the cart shelter range on the west side. External brick steps, with slate treads, lead to a boarded door on the upper level. A central segmental-headed doorway with a keystone forms one side of an opposing entrance. The range also features ventilation slits. To the left is a largely unbroken rear wall of a single-storey cowhouse range, with access primarily from the yard side.

The internal yard elevations are accessed through the back of the cart shelter. The barn's interior mirrors the external elevation and includes a cross-shaped and long, narrow ventilation slit to the right of the doorway. The cowhouse to its right has a doorway on the left and another to the right, flanked by ventilator windows. A similar arrangement of doors and windows is present on the long cowhouse range on the east side. The west range contains stables in its single-storey section. The central, open-fronted shelter shed has wide openings extending to eaves level in both long walls. The walled enclosure largely survives on the west side, with some parts removed from the east. The north gable end wall has a large built-in slate trough to the left and a boarded door on the right. The cowhouses have A-frame trusses. A range to the east houses a large slate slab water tank. The barn’s roof is a king-post design and was rebuilt around 1944, but follows a 19th-century pattern.