The following text is from the original listed building designation:
HILDENBOROUGH UNDERRIVER TQ 55 SE 2/211 Threshing barn at Rumshed Farm 16.1.75 (formerly listed as Barn and Outbuilding to west of St Julian's Farmhouse)
GV II
Threshing barn. Probably C18. Framed construction on a stone sill, clad with weatherboarding; peg-tile roof; south east outshut concrete block.
Plan: 5-bay threshing barn on an east west axis with opposed full-height doorways to the threshing floor in the centre, the north doorway preserving its original porch. Outshuts flank the north porch, outshut at the east end and one on the south side, east of the door. The south doors were destroyed by the 1987 hurricane.
Exterior: Single storey. The roof is gabled at the west end where the barn adjoins a granary and hipped at the east end where it is swept down over an outshut. The south elevation is blind to the left of the threshing doorway. To the right the roof sweeps down as a catslide over a concrete block outshut with a pair of stable doors. The north elevation has a deep porch with a hipped roof in the centre flanked by outshuts with catslide roofs, each outshut with one door and one window, one of the windows with shutters.
Interior: Clasped purlin collar rafter roof of 5 bays with intermediate birdsmouth ties. There are queen struts above the tie-beam and concave braces between the wall posts and tie beams, some of these braces no longer exist and others have been replaced with straight braces. There is a single tier of upward curving wind braces below the clasped purlins. The wall framing is of large scantling with convex down braces, one only to each bay.
The threshing barn is still in use as a farmbuilding and forms a good farmstead group with other agricultural buildings and Rumshed Farmhouse. The farm has changed its name from St Julian's Farm to Rumshed Farm since 1975. The parish and district boundary runs through the farmhouse, which is partly in Sevenoaks District.
Listing NGR: TQ5661249320

English Heritage, List of Buildings of Special Architectural or Historic Interest (Map). SKE16160.