No. 4, Yon Street

No. 4 on Yon Street is a house dating from the late 15th century or early 16th century, with remodels in the late 16th century and again in the 17th century. It is constructed of plastered stone rubble and cob, topped with a thatched roof that has both hipped and gabled ends. The house features a rendered axial stack.

The layout suggests it was originally the high end of a late medieval house, with the lower left end (now No. 6) having been extensively rebuilt as a separate dwelling. The hall and inner room were originally open to the roof and heated by an open hearth fire. A chamber was added over the inner room, likely in the late 16th century, while the hall remained open. In the 17th century, a floor was added to the hall, and an axial stack was constructed at its lower end, although the inner room likely remained unheated.

The exterior is one storey with an attic and has an asymmetrical front. There are two 20th-century casements on the ground floor, with the left one featuring a timber lintel and a very small opening to the right of an off-centre 20th-century glazed door. Above, there is an early 20th-century two-light casement under the eaves, along with a small lunette dormer with radiating glazing bars in the thatch to the right. The rear elevation is blind.

Inside, the former hall (the left room) has chamfered cross beams with jewel-and-bar stops, and the hall fireplace is blocked. The inner right-hand room has rough, unchamfered beams. The original three-bay roof structure remains intact, featuring two side-pegged jointed cruck trusses with threaded purlins and a diagonally-set trenched ridge piece, but lacks collars. The roof is complete with common rafters and is smoke-blackened from end to end, affecting about half of the thatch and battens. A wattle-and-daub partition has been inserted between the two trusses, which is smoke-blackened only on the hall side.