There’s a branch from my neighbor’s tree growing over my fence. Can I trim it back?

The answer is yes!  The common law rule states: A possessor of land is not liable to persons outside the land for a nuisance resulting from trees and natural vegetation growing on the land.  The adjoining property owner to such a nuisance, however, is privileged to trim back, at the adjoining owner’s own expense, any encroaching tree roots or branches or other vegetation which has grown onto his property.

You may trim the vegetation, but keep in mind, that you may only trim UP TO the property line, and you are responsible for properly disposing of any cuttings.