Subdivision Approval. All subdivisions as defined under Section 26-2 are subject to the review procedures outlined below.

Site Plan Approval. Except as hereinafter provided, no construction permit shall be issued for any structure until a site plan has been reviewed and approved by the appropriate board, except that 1. a building permit for a single family dwelling unit and its accessory building on a lot shall not require site plan approval; and 2. any addition or alteration to an existing conforming residential or nonresidential structure which does not account for more than twenty-five (25%) percent additional building coverage shall not require site plan approval if, in the opinion of the Construction Official, such addition or alteration will not result in nonconformance with Borough ordinances and will not create nuisance problems to adjacent land uses.