‘Ad quod damnum’ is a Latin phrase meaning ‘to what damage.’ It refers to a writ directing the sheriff to inquire of jurors under oath to what damage a grant would be to various people if the king were to make the grant. The writ was issuable from the Court of Chancery. The writ is of ancient origin. Ad quod damnum is also known as the writ of ad quod damnum.
Ad quod damnum is a legal phrase used for assessing damages relating to privately owned land that is taken for public use.