The Old Mill Including Studio Adjoining the South West

This is a house, formerly a farmhouse and likely a mill house, dating probably to the early 16th century, with later improvements from the late 16th and 17th centuries, and modernised around 1970. The walls are plastered cob on rubble footings, with stone rubble stacks, two of stone and one of 20th-century brick. The roof is thatched.

Originally a 3-room-and-through-passage house, the layout evolved into a 3-room plan facing south-east, with a service end to the north-east. The rear passage doorway has been blocked, and the lower passage screen removed. There are end stacks to the former service and inner rooms, the latter projecting. The building has an irregular front with four windows, featuring a mix of 19th and 20th-century casements with glazing bars. A first-floor window to the right of centre has a leaded light, and all upper windows have thatch eyebrows. The front doors are circa 1970 glazed doors, positioned in the centre of the passage and at the left end. The roof is gable-ended to the left and hipped to the right.

Inside, the oldest part of the building is the roof structure. Although largely concealed by later partitions, the visible elements suggest a wholly 16th-century construction. One exposed truss over the inner room is likely early 16th century, featuring a jointed cruck held together by pegged buried slip tenons. Elsewhere, the purlins are visible, with those over the hall bay showing a mid-16th-century chamfered profile with run-out stops. Evidence of smoke-blackening from a former open hearth fire is present. The ground floor rooms contain features from the late 16th and 17th centuries. The former inner room has a soffit-chamfered crossbeam with late step stops. The fireplace is blocked. The hall has a crossbeam from the late 16th to early 17th century, with a broad soffit chamfer and step stops. There's a likely 17th-century rubble fireplace with an oak lintel supported on oak pads, with a roughly chamfered soffit, and an oven doorway in the rear wall. An oven projection would have blocked the probable passage. A roughly chamfered soffit crossbeam is also present in the service end, with a blocked fireplace.

Attached to the left (inner room) end and set back from the front is a former shippon with a hayloft, now converted into a studio/office. Constructed of rubble with a slate roof and featuring a 20th-century casement window and door on the left end, this section is included in the listing for group value. The building is labelled South Yeo Mill on Ordnance Survey maps.