Barn and Adjoining Horse Mill Approximately 45 Metres West of Waterton Hall Farmhouse

A threshing barn and adjoining horse mill, dating to the mid-to-late 18th century with later alterations and an early 19th-century horse mill. The building is constructed of red-brown brick with pantile roofs. The barn is rectangular, featuring a central through waggon entrance, with a horse mill attached to the east side. It stands two storeys high, with three tiers of openings across five internal bays.

The west side has a waggon entrance, lacking doors, beneath a timber lintel formed from reused timber framing, and a recessed basket-arched panel. The bottom tier of openings includes three blocked breather slits on the left, and to the right, a pair of blocked slits, a rectangular hatch, and an inserted window with glazing bars. The middle tier has a single slit, an inserted board door beneath a cambered brick arch, flanked by casements with glazing bars and brick sills, and to the right, a partly-blocked opening with a hatch door and single slits. To the upper tier are five slits. Stepped eaves are present. A shaped stone kneeler is visible on the left gable, while the right gable was rebuilt in the 20th century.

The east side has a waggon entrance similar to the west, with later brick blocking containing a segmental-headed door. The lower tier features three slits and a hatch on the left, and two slits and a door on the right. The middle tier includes two slits and a hatch on the left, and three slits flanking two hatches. The top tier has six slits. A dentilled brick eaves cornice runs along the top.

The horse mill, adjoining the barn on the left, is single-storey with a canted east end and the south side incorporated into a foldyard wall. It has a hipped roof supported by brick piers, with open sides to the north and east, and an inserted dwarf wall on the north-east side.

The barn’s interior contains a flagstone threshing floor and a five-bay roof with tie beams to the main trusses, intermediate collared principal rafters, and two tiers of staggered butt purlins. The horse mill contains original machinery, including a chamfered central spindle shaft with tongue stops and raking struts to cross beams with harness attachment arms, and an upper drive wheel with iron teeth. The spindle pivots on an iron pin resting in a socket stone. This represents a notably complete set of horse mill machinery for South Humberside.

The barn is likely contemporary with a nearby stable/dovecote dated 1767. The other ranges adjoining the barn and horse mill are not of special architectural or historic interest.