He was a leper; the cause whereof see 2 Chronicles 26:16. Dwelt in a several house; separated from conversation with others by virtue of that law, Leviticus 13:46, which being the law of the King of kings, bound kings no less than subjects. Over the house, judging the people of the land, i.e. he governed the king's court and whole kingdom, in his name, and as his vicegerent.
Related Commentaries of 2 Kings 15:5
2 Kings 15:5
5 And the LORD smote the king, so that he was a leper unto the day of his death, and dwelt in a several house. And Jotham the king's son was over the house, judging the people of the land.