After a nearly 15 year period of explosive growth, the district's enrollment has now stabilized.  New, residential housing developments in the City of Mason and Deerfield Township are part of the Facility master Plan, but there remains a general decline in enrollment when considering that the Class of 2018 (Mason's largest class) had 920 students while there are 660 students in the Class of 2032.

The plan ensures that all Mason City Schools are safe,  technology-ready and high quality learning environments.  The plan eliminates splitting grades and lessens the number of transitions students make, while providing flexibility so that the district's facilities address the needs of Mason's learners today and 50 years from now.

Under the plan, the district began leasing Western Row Elementary to the Warren County Educational Service Center in 2020.  Closing Western Row save approximately $550,000 a year in operating costs a year.  In 2012, the district closed another elementary school, Mason Heights, based on enrollment.  That saved $700,000 in operating costs and eliminated additional costs that would be needed to maintain an aging building.  Royalmont Academy purchased Mason Heights for $1 million.

During the 2018-2019 school year, Mason Middle School (which was built in 1959 as the original Mason High School) was closed for a total renovation.  Mason Middle School was originally built as mason High School 60 years ago  Watch this video featuring Al Voorhis (MHS Class of 1944) who was the original MHS architect and his son Jim Voorhis (MHS Class of 1979) architect of all the district's current schools as they explore the renovated MMS together.