Nothing in this article shall be deemed to prevent the alteration or enlargement of a nonconforming or conforming nonresidential building with a nonconforming use or construction of an addition to existing building(s) or additional building on the premises, so long as said increase in size of the building(s) created by enlargement of the existing buildings or structures or by the construction of a new and separate building or structure does not result in an increase in the overall building footprint(s) of more than 30%, except that said increase shall not exceed the applicable maximum lot coverage, and all other setback and area requirements shall apply, provided that the following site remediation measures, in full or in part, as shall be determined by the Planning Board within its sole discretion, are included as an essential element of the aforesaid expansion:
Substantial enhancement of the overall site landscaping and/or natural vegetation.
Employment of best visual practices by upgrades to existing building facades and/or design of new buildings and/or the additions to existing buildings which accurately or more accurately depict the historic and/or existing rural character of the immediate and nearby neighborhood(s).