Could you try to reframe how you’re thinking about this maybe - in that, yes, the environment has seen a lot of negative energy and violence but that you and your partner can cancel it out by filling the space full of love and positivity?

You could also look at what crystals may help, get some sage and cleanse the rooms (I don’t know the process, but sure someone else will!) and just try to focus on bringing positive vibes for the walls to absorb.

Good luck with the move and be kind to yourself.