Such nonconforming building or other structure which has been damaged or destroyed by any means to the extent of 75% or more of its equalized assessed value as determined by the Assessor of the Town of Cheektowaga or the Town of Lancaster, as may be applicable, or which has been ordered to be demolished or removed by the Village Board of Trustees by resolution shall not be rebuilt nor repaired except in conformance with the regulations of this chapter. In the case of a permitted restoration of a nonconforming use, neither the floor area nor the cubical content shall be increased from the original nonconforming building or other structure.