Examples of using "建設中です" in a sentence and their english translations:
The bridge is still under construction.
A new school building is under construction.
They are building a long bridge across the channel.
are building the International African American Museum.
An office building, with 22 stories above ground and 2 below, is under construction.
Our school's gym is under construction now.
The new library has been under construction since last year.
Incidentally a motorway ramp is being constructed in the neighbourhood, a few hundred metres away, of my clinic.