This is in Michigan.
My neighbor put up what he calls a "Temporary Garage" which is about 25 x 35 feet long 10 feet in height at the sidewalls, without a permit. The building is on a gravel pad and is about 18 inches (sidewall) from our property line which has a boundry fence on it which we erected on our side of the property. We put up the fence due to encroachment and tresspassing issues. The overhange of the roof is about 8 inches from the property line and fence. The roof slopes so that the snow will fall on and over the east-west property line onto our property and on top of our fence. We had our property surveyed before we put up the fence and the survey markers are in place. There is one survey marker next to the building which the neighbor put up which I base my measurements for the building's distance from the property line. This building is within 500 feet of a body of water.
We complained to the local building/zoning office about the building and the zoning department issued the neighbor a building permit retrospectively. I am baffled that the zoning office would issue a permit that would allow the roof to dump what will be tons of snow on my property and driveway and will crush our fence and any vehicle parked there. We have a steel building on our property and last winter the snow piles were at least 5 feet high and 8 feet across (compacted) where the snow basically slides off the roof with a great deal of force I have contacted the zoning office to ask them how they could retrospectively issue a permit for this building that will literally dump tons of snow on my property. Crickets. We contacted the neighbor and told them of our concern about the snow. They now run and hide whenever they see us. Advice please.