Update - 2 calls and many texts today from stbxah, fresh out of rehab. I've now officially blocked him.
He says he wants to meet up so he can "tell me things" and I told him I am not able to meet, but if he needs to discuss house/mortgage stuff we can do that over the phone tomorrow. To which he said "why are you making this so hard" and "you can't hide at your parents house forever" -- which to me is a borderline threat and I quickly blocked him as a result. If house things come up he can email me or go through my attorney.
He is angry and in denial. Bad combo. He and his mom are heading to her place up north until after New Years, so I at least know I'll have physical space. I plan to take someone with me when I go check on the house, pick up mail, etc. Thank you all for your encouraging words.