City Directory Research helps environmental professionals reconstruct the historical use of a subject property and nearby sites by tracing occupants, businesses, and land uses through decades of historical directory records. The research supports the historical-use investigation performed as part of Phase I Environmental Site Assessments under ASTM E1527-21 Section 8.3.

Banks researches historical city directories, crisscross directories, reverse-address sources, and genealogical reference collections to identify who occupied a property and what types of businesses operated there. Standard research extends back to approximately 1940 where records are available, with deeper research into the nineteenth century available in some regions at additional cost.

For each available directory year, Banks identifies the occupants associated with the researched addresses and, where possible, characterizes their apparent business use.

That can reveal former uses such as dry cleaners, printers, manufacturers, contractors, service stations, repair businesses, offices, retailers, restaurants, residences, and other activities that may help an environmental professional understand the site's history.

The report preserves changes over time, including years in which a property is listed as vacant or no tenant can be identified.

Historical environmental concerns do not stop at the property line. Banks researches the subject property together with surrounding address ranges, including adjacent, across-street, up-street, down-street, and nearby properties where appropriate.

The finished report clearly distinguishes the subject site from surrounding locations and organizes the results by directory year. This allows the reviewer to follow changes in occupancy and land use over time rather than sorting through disconnected historical listings. Larger custom search areas are available as well.

Addresses are not as permanent as they appear. Streets are renamed, numbering systems change, buildings are demolished or combined. Older directories may use inconsistent spellings or descriptions, and some years simply do not survive.

Banks researchers perform this work by hand because following one physical site across decades of changing address information requires judgment that a purely automated lookup can miss. Where historical directories are unavailable, the report identifies the gap so you stay informed.

Banks draws from multiple directory collections rather than relying on a single source, sometimes including Haines, Coles, and Polk directories in searches back to 1940 or the earliest available year. The result is a chronological record designed to make historical property-use review faster and easier for the environmental professional.

City Directory Research is also available for broader historical, property, and environmental research outside of Phase I ESA work. Deeper historical research, including nineteenth-century records where available, can be performed on a custom basis.