Betchworth Castle is a mostly crumbled ruin of a fortified medieval stone house with some tall, two-storey corners strengthened in the 18th century, in the north of the semi-rural
parish of
Brockham. It is built on a sandstone spur overlooking the western bank of the
Mole in
Surrey in
England. The ruin is a
Scheduled Ancient Monument and is in the lowest category of
listed architecture, Grade II, due east of
Dorking railway station in
Dorking and due west of
Reigate. Although close to the river and edge of the course it is surrounded by "
Betchworth Park" Golf Course named after the village east.