New classroom new staff room

We have started our new project.
We are building a building with new classrooms and a staff room. Our school is becoming very popular and the existing classrooms are too few.

To build the new building, the old, very dilapidated building must first be demolished. We have calculated that it would be cheaper for us to leave the old building instead of renovating it. We can use part of the old foundations for the new building, which saves us costs again.