We moved about a block last year and I coordinated the entire move, so I completely understand where you are. Things I hadn’t thought of but wish I had -> not every office space in the new location was compatible with our current furnishings/decor. Unless it comes furnished or you are getting new furnishings, measure each space carefully and move furniture accordingly. It would also be super helpful to take your team members over ahead of the move and let them get an idea of the space that they’ll be occupying. When we moved (despite the fact that I was the coordinator), I didn’t have an idea of my workspace layout, so there was a lot of adjustment of what to do with my personal items and reference materials.
Finally, I know you know this but plan every possible needed item for a successful day to already be in place before the staff reports to the new facility. We had everything in place like internet, but I didn’t think to start new water cooler service (we were an expansion) until the week before and they weren’t able to deliver until we’d already been in the space for several days. Likewise if you’re getting a new fridge, make sure it’s in place long enough to be cold for when lunches go in it on day 1. If you’re moving the current fridge, make sure your people take their stuff home/clean it out before the move.