Formal ownership of the land seems unlikely. As mentioned in the chapter Harvard has owned that property almost as long as it's existed. It'd be a huge scandal if nothing else.
It's probably simpler to subvert the entire university than take one building. Which started as a joke, but actually seems surprisingly plausible at a second look.
Harvard has a weird setup with a special
corporation with a small number members that owns the whole thing. Nowadays it's a 13 person board, but the quest is happening in 2006. From its foundation to that year the corporation only has 6 members, it changed things up because the president at the time was a sexist fuckup*. He's staring down a no confidence vote and the university is in managerial turmoil.
Which is the perfect time to make a deal with a devil.
We don't have VEE but we could offer him a social rebuild via IDU, dirt on his rivals (which we naturally keep copies of in addition to any blackmail we dig up on him), and demonic AI assistance in doing the hard parts of his job.
All he has to do is sign on the dotted line.
Taking the other seats will be harder, but we have the best information warfare tool in existence and they're secretive academic plutocrats. There's something for us to use.
Justifying it IC is a little tricky, but I can sort of see making the argument that we're giving these guys their just desserts and saving the university from suffering simply because it's leadership is unconcerned with their wellbeing and completely unequipped to deal with their new supernatural terrain feature.
* I'm assuming that we won't have real people appearing in the quest, but that events should roughly be the same. So even if the current president is completely different their general struggles with the school would be the same.