When preparing an application to create a National Historic District, which factor is most important to consider?

• A. A survey of all historic buildings in the city and information about particular design styles or notable works
• B. The age of the district
• C. The budget for preservation
• D. The number of contributing buildings

Answer: (D)

Think about what a National Historic District nomination actually demonstrates: a defined area where a group of resources works together to convey a specific historic character. The most important factor here is the number of contributing buildings within that area. Contributing buildings are those that retain their historical integrity and actively illustrate the district’s significance. A higher count of these resources shows a dense, coherent historic fabric and strengthens the case that the area functions as a unified district.

Age matters, but not by itself—the properties should be historic (typically around 50 years old or more) and contribute to a recognized historical context. The budget for preservation isn’t a criterion for eligibility, and a survey of all historic buildings citywide isn’t necessary. What matters is the concentration of resources that collectively tell the district’s story, measured by how many contribute to that story.