The school is nearly 20-years-old.
And a second expansion may already be on the way for Dakota Valley's High School.
The last expansion at Dakota Valley was five years ago in order to deal with growing enrollment.
But the number of new students continues to increase every year, and now the school is past its maximum capacity.
The district's school board has approved a committee's recommendation for the new construction to begin next summer.
The cost could run anywhere from about $12.5 million dollars up to $21 million.
"It will provide the educational opportunity for us, which we already have, but it won't be in a crowded situation. One thing is this high school is built to hold 300 and were at about 320 now. We expect to be at about 360 next year and the year after 380 and then close to 400," said Superintendent Al Leber.
The next step will be for the district to hire an architect to come up with a design and hire a bonding company.
Voters would be asked to approve the bond issue for the new building next spring.
If approved, the new building could be ready by the fall of 2016.