Hosey Common is today a woodland area to the south east of Westerham. Within the woodland is a shallow dry valley. A western facing escarpment contains the former entrances of several stone quarries.
It is believed there are six entrances, running to the east, the longest extending to around 70 metres. There are also north south galleries that connect some of the entrance passages. The quarries are believd to date from the early or mid 19th century.
The stone is of relatively poor quality ragstone and is likely to have been used for local buildings. The site is now managed by the Kent Wildlife Trust and portions of the quarry are used by hibernating bats.