John Gill Commentary 2 Chronicles 26:21

"And Uzziah the king was a leper unto the day of his death, and dwelt in a separate house, being a leper; for he was cut off from the house of Jehovah: and Jotham his son was over the king`s house, judging the people of the land." — 2 Chronicles 26:21 (ASV)

And Uzziah the king was a leper unto the day of his death, and dwelt in a several house, being a leper (See Gill on 2 Kings 15:5),

for he was cut off from the house of the Lord ; not, suffered to enter into that, because of his uncleanness:

and Jotham his son was over the king's house, judging the people of the land ; see (2 Kings 15:5) .