en_tn/2ch/26/21.md

to the day of his death

"until he died" or "the rest of his life"

lived in a separate house

This indicates that he lived away from other houses and other people.

he was cut off from the house of Yahweh

Here being "cut off" from Yahweh's house represents being excluded from the temple. AT: "he was excluded from the house of Yahweh" or "he was not allowed to go to the temple" (See: rc://en/ta/man/translate/figs-metaphor)

Jotham, his son, was over the king's house

Here being over something represents having responsibility or authority for it. AT: "Jotham, his son, was responsible for the king's house" or "Jotham, his son, was in charge of the palace" (See: rc://en/ta/man/translate/figs-metaphor)

the king's house

This refers to the king's palace, which the king was no longer living in.