Being without ur partner must be tough since ur so far along, but ur going to have to be strong since he's fixing up the new house while ur at ur moms. If the house is in livable condition for u go over there and stay then do that, but if doing that is just going to cause u stress then just stay at mom's. I'm pretty sure that's what u two arranged to begin with. u don't have too much longer to go, be strong u guys will be together very soon.
I agree. I'm sure this arrangement isn't easy on him either. He's probably stressed being away from you knowing you're that far along and baby could arrive anytime, but also wants the house right so he can bring his new family home to it.
You need all the rest you can get right now, & yes, if they space isn't relaxing or accommodating to your needs, then stay where you are.