en_tn_condensed/lev/14/48.md

the house was plastered

This can be translated in active form. Alternate translation: "the owner put new clay on the stones" (See: rc://en/ta/man/translate/figs-activepassive)

he will pronounce the house clean

A place that is fit for people to occupy is spoken of as if it were physically clean. (See: rc://en/ta/man/translate/figs-metaphor)