The Clay family sold the house and much of the estate on the death of Henry Clay to the Chepstow Racecourse Company (of which the Directors were all members of the Clay family), who opened the new racecourse there in 1926. The house, already in a poor state of repair, was abandoned and stripped, gradually decaying to its current ruinous condition, with just the main walls still standing. During World War II the area was used by US forces training in urban warfare before the Normandy landings; damage from the live fire exercises is still visible. The woods overlooking the river became established as a nature reserve, and footpaths which now form part of the Wye Valley Walk were reopened in the 1970s. Plans to develop the site as a hotel or outdoor pursuits centre have so far been unfulfilled, with emergency repairs to the house carried out in 2008–09.