Have you seen wasps near it? It does look like a wasps nest but it could be vacant. When its cool ( early morning or late evening), 1) tie a slip knot loop larger than your fist over your wrist . 2) place a large plastic bag or sack over the nest, 3) grasp the closed bag neck tightly then bring the string hoop over the neck, pull tight then secure with another knot. Take to some where in the country side then snip a corner off the sack (facing away from you) .