Farm Buildings at Garth Farm and Heylin Farm

The farm buildings at Garth Farm and Heylin Farm date back to the 18th century and are constructed from English garden wall bond brick, featuring corrugated asbestos and slate roofs with open eaves. The layout is an open 'U'-plan, with a central cross range that creates one closed yard and one open yard at the northeast end, which may have originally been designed as two closed yards. At the corners are two-storey pavilion blocks with hipped roofs, with the Bailiff's house located at the northeast corner, now known as Garth farmhouse. The buildings have large 20th-century windows.

The main southwest elevation features a central driftway with a three-centred cart arch made of two half-brick rings, which is rebated for doors. There are four tiers of vented brickwork in lozenge patterns, along with pitching openings on the southwest side and within the driftway. The wings comprise a long range of cow houses that have four-centred arches leading to the yard. The low-pitched roof trusses are supported by struts from the haunched king posts to a single tier of purlins.

The upper closed yard is enclosed by a stone wall with rounded corners, containing the central fold yard. The cross range of buildings, which may have originally served as animal shelter for the foldyard, has been largely rebuilt. Some original doors and windows remain.

Attached to the southwest corner is an open-sided three-bay sawmill building, which has been extended by a single bay to the northwest. It features a gabled roof covered with torched graduated slates, supported by wide king post trusses with queen posts. There is a valley gutter against the brick farm building, and the southwest elevation consists of four stone piers with later infill on the southeast elevation.

The buildings have been largely altered due to post-war conversion and have suffered fire damage in part of the southwest range, but they still retain the original layout's plan form. There is also evidence of former saw pits at the eastern end of the sawmill building.