Duke Street Courthouse is the principal court of justice in Lancetide. Within it, the King's Court tries cases in which the crown is a prosecutor, and the Court of Common Please tries cases between individuals and businesses.

The building is impressive, hewn from brown stone and dwarfing the many homes and shops around it. After entering through several well-attended guard posts, the interior is equally impressive, with walls panelled in dark oak and ornate brass chandeliers lighting the chambers.

The court and city judiciary is overseen by The Councillor of Justice, a member of the Lancetide Municipal Government. The courts are protected by a small branch of The City Guard of Lancetide.