Under construction; indicates that a building or facility is currently being built (construction in progress).
駅前に新しいショッピングモールが建設中だ。
A new shopping mall is under construction in front of the station.
この道路は建設中のため、片側通行になっています。
This road is under construction, so traffic is one-way.
建設中のビルからは毎日大きな音が聞こえる。
Loud noises can be heard every day from the building under construction.