St Osyth's Priory Stable Block adjacent to north west of barn

St Osyth's Priory Stable Block, built in the late 18th century and remodelled by Sir John Johnson in the late 19th century, is located adjacent to the northwest of the barn.

The building is constructed of red brick laid in Flemish bond and features a tiled roof. It has two storeys and a hipped roof, connecting to the Tithe Barn at its south end. The east elevation showcases a brick band at the first floor, a central entrance with a four-centred arch, and a late 19th-century door with decorative strap hinges and a fanlight above. There is a similar door at the south end leading to the grooms’ room. The façade also includes three two-light mullion windows with cusped heads, leaded lights, and over-painted brick hood-moulds. The north elevation features a door like that leading to the grooms’ room and a mullion window. The west elevation has an inserted door at ground floor and a taking-in door to the loft towards the north, with a second door opening that has been enlarged and is partially exposed to the elements.

Inside, the former stabling area on the ground floor has lightly chamfered transverse bridging beams and timber clad walls, although the stalls and feed chutes have been removed. The grooms’ room to the south also has timber clad walls, a pamment floor, and saddle mounts on the walls. A stair leads to the loft above, which has no historic fixtures and fittings but features an exposed 19th-century king-post roof. The timber-framed partition with the Tithe Barn at the south end contains studs and a wall-plate of heavy scantling and retains some wattle and daub partitions. A plank door with strap hinges provides access to an inserted mezzanine at the west end of the Tithe Barn.