San Luis Obispo High School is more than halfway through a $100 million renovation project that started four-and-a-half years ago.
The project has already produced a new gym a new math lab building which opened last March, but it's set to provide major upgrades for nearly all departments.
An old parking lot will become a 400-seat performing arts center and a brand new office building for school staff.
A band room and a nine lane track are also being added by January 2020.
The school's principal, Leslie O'Connor, says having these amenities available by January will allow time for the main classroom section to be constructed.
"We know that our main classroom building, the 100 building, is the big project which is probably going to come in at an excess of $20-25 million," O'Connor said.
The main building will take two years to reconstruct and once finished, will be open as a student union from 7 a.m. to 7 p.m.
Some students are currently set up in portable classrooms and also using a temporary cafeteria while the construction is underway.
O'Connor says the complete revamp is expected to take another three to four years to complete.