The current high school was built in 1969 and the entire Fenton Area Public Schools complex has evolved over decades; the high school recently underwent major renovations and expansion. In 2006, a new addition was made to the English wing of the school. In 2007, the building underwent renovations to expand the fine arts wing, pool, and lunch room, and to add an auxiliary gym. With these new renovations the High School now offers an IB Diploma Programme curriculum.
The previous Fenton High School, which was first built in the 1890s and was expanded over the decades, became a middle school, and, with the 2006-07 opening of Schmidt Middle School which shares the Fenton Area Public School complex with the high school, Ellen Street Academy. Southern Lakes Parks and Recreation is also housed at Ellen Street Academy.
In addition to the Little League Baseball fields, other athletic fields at Fenton High School include Ivan Williams Field, used for football and track and field, a soccer field and high school baseball fields. Ivan Williams Field was rebuilt in 2007 to seat 2,500 spectators. However, the school welcomed more than 3,500 people into the stadium for the opening home football game of the 2007 season.