When a building or structure is undergoing renovation or repair work, it is typically marked as "under construction." However, this term can become repetitive and lose its impact over time. So, it's essential to have a few synonyms in your vocabulary to describe the same thing. Some alternatives to "under construction" include "in progress," "being remodeled/renovated," "undergoing repairs," "currently being built," "under development," and "in the midst of renovation." These synonyms add variety to your vocabulary, making your communication more interesting, and avoiding boredom for your audience. Choose the one that suits your sentence structure and ensures perfect communication.