Can one use a succa built by a non-Jew? If not, how much involvement of a Jew is required to make the succa kosher?
Shulchan Aruch writes 635/1
סוכה אע"פ שלא נעשית לשם מצוה כשרה והוא שתהיה עשויה לצל כגון סוכת עכו"ם
As long as a Sukka was made - meaning if the schach was put up - to make shade, it is kosher, such as a one put up by a non Jew.
