BS. I wanted to build one on my property, but here in Germany you need a permit if you wanna build a birds house (I’m not kidding, in some areas you do), I didn’t get one, neighbors and shit, so I sold the house, we’re moving to Denmark this year. No neighbors, no problems. Especially not German neighbors! As long as you have a Danebrog (Danish flag) on your property, you can build a lot. It’s your property at last.