Good call, yes these are Steatoda nobilis. Safer to move them out of harm's way, but they are quite skittish & move fairly fast when spooked. They don't seem to relish contact with humans & often stay out of reach.
I can appreciate that's not welcome news, but just about every building around here is too...traffic lights, cars..they get everywhere. But they're not a hot topic of conversation around here because they largely go completely unnoticed, they might live in close quarters to us, but physical contact is very rare.
Sensible to be aware of them though & not tempt fate.