John Julius, Chris Kuhn and Eric Schwaab have appealed the decisions of the Hyannis Main Street Waterfront Historic District Commission (HHDC) to approve the Applicant’s request, WinnDevelopment, Company LP, for a Certificate of Demolition of the existing structure and for a Certificate of Appropriateness for a proposed residential structure with associated improvements. The subject property is located at 307 Main Street, Hyannis, as shown on Assessor’s Map 327 Parcel 103