Code: Unsafe Building (Unsafe building violation)
Description: An unsafe building is a legal emergency because DOB considers the structure dangerous to people or property. It is usually open, vacant, unguarded, or structurally compromised and often has a special UB unsafe building violation.
Practical Meaning: For a homeowner, this means DOB has decided that your building or part of it is so unsafe that you must seal, repair, or demolish it as soon as possible. If you do not act, the city can go to court, do the work itself, and add the survey and construction costs to your property record.
Where You May See It: DOB violation notices, BIS (UB before the violation number), DOB NOW records, Unsafe Buildings Unit letters, title reports, lender questions during sale or refinance.
Why It Matters: An unsafe building violation can lead to high repair or demolition costs, survey fees, and serious problems with refinancing or selling until the unsafe condition is cured and the UB violation is dismissed. It also shows there is a real safety risk for tenants, neighbors, and people on the street, so DOB enforcement is strict and time-sensitive.