Notwithstanding § 62.23(7)(h), Wis. Stats., the repair, reconstruction, renovating, remodeling, or expansion of a legal nonconforming structure, or any environmental control facility related to a legal nonconforming structure, located in the C-1 Conservancy District and in existence at the time of adoption or subsequent amendment of this chapter is permitted pursuant to § 61.351(5), Wis. Stats.