The number of units to be tested in multifamily housing is based on what?

• A. Day of construction & total number of units
• B. Building age
• C. Number of bedrooms
• D. Owner preference

Answer: (A)

The number of units to test in multifamily housing is determined by two factors: the building’s construction date and the total number of units. Older buildings (built before the lead paint bans) are more likely to have lead-based paint, so inspectors use a sampling plan that tests a representative portion of units to reliably assess the entire building. At the same time, the overall size of the building matters: larger buildings have more units that could contain lead paint, so the sampling needs to scale with how many units exist to achieve a trustworthy assessment without testing every single unit. Choices based on how many bedrooms, the day of construction alone, or owner preference don’t capture this regulatory approach.