Within 35 days of the close of the hearing, the Board of Appeals shall make findings of fact and grant, grant with conditions, or deny the appeal. Written notice of the decision of the Board shall be sent to the appellant, the Code Enforcement Officer, the Planning Board, and the Select Board within seven days of the decision. For appeals or variances in any Shoreland Zone, the Board shall cause written notice to be mailed to the Department of Environmental Protection within seven days of the Board's decision. Decisions shall be in writing and shall contain a statement of findings and conclusions, as well as the reasons or basis therefor. Decisions shall be sent to the appellant via certified mail.