- September 6, 2019 - Bond anticipation note issued to finance building design
- August 7, 2019 - Closed on purchase of adjoining property
- June 11, 2019 - The referendum for the new building project passed.
- April 10, 2019 - Maine State Board of Education approved the "Concept Design" for the SMHS new building project.
- March 20, 2019 - At a public forum held at SMHS, the community voted to support moving forward with the "Concept Design".
- December 12, 2018 - The Maine State Board of Education approved the "Site Application" for the SMHS new building project
- May 1, 2018 - At a public forum held at SMHS, the community voted to support keeping the new Middle/High School on the existing Sumner Memorial High School site
- February 6, 2018 - Board voted unanimously to include the middle school grades (6-8) as part of the new building project
- January 2, 2018 - Board approves to proceed with the application to locate new facility on existing SMHS site
- February 17, 2017 - Initial Approval