A Norwich Free School, the Sir Isaac Newton Sixth Form, has moved into the city's Old Fire Station.
The sixth form, which specialises in maths and science, has been running in temporary classrooms for two terms while the listed building was converted into a school.
The architects have retained many of the features of the old fire station, creating open spaces for students to gather.
The tender hall where the fire engines were kept is now a lecture theatre.
The Principal, Dr Mark Evans, says the building will add to the students' learning experience.
"It speaks of 70 years of fire engines parked in this very spot, of course the poles in the corner of the room are listed and the doors themselves have been kept, though we've put in a little extra glass."
"The whole space will always say fire station, important norwich heritage, as well as cutting edge science school."
Tomorrow evening at 7pm, the school will hold an open day, both for prospective parents and for visitors interested in the building's story.