I used to have a bad problem with wasps in my mini barn until one year I saw this red, mud cocoon looking thing being built over the inside door on an old paint roller handle. Turned out to be a mud wasp nest. Watching her build it out of good ol' PEI red mud was fascinating so I let her finish. I only ever saw one of them at a time so it wasn't very intimidating.
I was later told by a friend and professor at the local vet college that it is wise to let them build as they are solitary, very docile unless physically handled and they don't defend their nests. Despite that, just their presence seems to discourages the more aggressive and swarming paper wasps from building nests close by.
My tenant is on her fourth year of rebuilding her home and I have never even had to complain about the noise.
