‘危房’ literally combines 危 (wēi), meaning 'dangerous' or 'precarious', and 房 (fáng), meaning 'building' or 'house'. Together, it refers specifically to a building that is structurally unsound—often due to age, poor construction, earthquake damage, or lack of maintenance—and therefore unsafe for occupancy. It’s a formal, official term frequently used in urban planning, housing inspections, safety regulations, and government notices.

The word carries serious connotations: calling a building a 危房 implies an imminent risk of collapse or injury, not just general disrepair. It’s commonly found in administrative documents, news reports about disasters or demolition projects, and public safety announcements. Unlike casual terms like 破房子 (broken house), 危房 is a technical classification with legal and safety implications—often triggering mandatory evacuation, renovation, or demolition.