Mettingham Castle was founded by Sir John de Norwich, who was given a licence to crenellate his existing manor house on the site in 1342.
[2] An Edwardian style gatehouse formed the entrance to the castle and supplemented a stone wall that surrounded the property.
[3] By 1562, there were "stables, servants' lodgings, kitchen, bakehouse, brewhouse, malting house, storehouses, and an aisled hall" within the castle walls.
[7] Today the site is a scheduled monument and a grade 2 listed building; the gatehouse still survives, as do some of the stone walls and many of the surrounding moats and earthworks.
[8] In the 21st century a major renovation project occurred at the castle to repair the worsening damage, involving a grant of £330,000 by English Heritage.