For those interested in more history of this situation, look at the Moultonboro's GIS system at
https://www.axisgis.com/moultonboroughNH/ - Search for Corr, select the property, then click on documents and links. There are building permits, zoning board decisions, variance applications and DES correspondence.
While the location change is well documented and ZB approved, I'm left wondering where the "changes in configuration, construction type or dimensions in accordance with plans dated 11/2/15" were approved. The variance application and new building permit, dated 5/25/16 references the original building permit and raises the estimated cost but has no hint of a multi-level structure.
Unless the building is longer, which the pictures imply it may be, there shouldn't be greater impact to water quality from roof runoff. Hopefully the supreme court will focus on confirming the building was built as approved.