What sororities require living in-house

As of today, I would guess only Tri Sigs wouldn't require living in house since they currently don't have a house but the rest do.

i believe all of the houses besides sigma sigma sigma (as they don’t have a house) have at least a year live in requirement. You can, if you have certain circumstances, get out of the housing most the time pretty easily, if need be for most, if not all houses. hope this helped!

How about replying only if you actually know the answer? While most houses want women to live in the house the year after they pledge, some houses can't accommodate everyone, so you might not get to live in. Usually a point system determines who can live in. That includes GPA, participation etc. So be the best you can be and you likely will be among the members of your recruitment class who can live in the house. BTW, this is truly something to aim for. It's a big part of what sorority life is about.