Not in any buildings Steve but I did have a wasps nest in a low (2ft. above dirt level) dry stone wall this year. They prevented me, until the temperature went cooler and pollen was in sort supply, from removing and old open bridge and replacing it with my new covered bridge. I presume their nest is still there and contains pupae?
I had thought about removing some of the stonework and removing any nest, or traces of one, but thought maybe if I did that they would return in spring/early summer and find a nice alternative home in my covered bridge. aaargh!.
I will watch this thread with interest