The Niamos Courthouse included a large hearing room where trials took place, including a tall desk for the presiding judge and one for a secretary equipped with an automated typewriter which he used to write sentencing cards with as well as a holopad screen. There was also a large red banner behind the judge, bearing the Imperial crest. The room was staffed with coastal defender stormtroopers carrying zap rods during trials to keep the prisoners in order. Behind the building was an Embarkation Yard where at least three Imperial prisoner transport ships could land and take off from. Prisoners were escorted to a staircase leading to the barge landing pads, from where they were directed to the barge headed to the prison they would serve their sentence in.
The Niamos Courthouse first appeared in "Announcement," the seventh episode of the Andor television series, which aired on October 19, 2022. The back of the courthouse was filmed at Carmel College in Wallingford, Oxfordshire, England.