Environmental Due Diligence

Sanborn Maps

The complete Sanborn Map Library – 1.3 million maps, seamless, searchable, certified, and available in LightBox Live

Sanborn®️ fire insurance maps provide detailed historical property information, including building footprints, construction details, storage tanks, occupants, and property uses. The Sanborn Map Report searches the complete Sanborn Map Library, with more than 1.3 million maps dating back to 1866, and includes a unique Sanborn®️ certification number documenting that the full collection was searched, providing a clear picture of a property’s past.

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Key Features

Unparalleled Coverage

Over 1.3 million maps dating back to 1866, representing the full holdings of the Sanborn Map® Library and covering urban and industrial areas across the United States, unmatched by any other source.

Rich Property Detail

Street name changes, building footprints, construction details, tank locations, hazardous material storage, occupants, and property uses at the time each map was drawn.

A Single, Seamless Mosaic

The full collection scanned into one high-resolution image with your target property centered and every image oriented north-up.

Layer & Compare in LightBox Live

Toggle between Sanborn maps and layer on city directories, aerials, and topos with adjustable opacity to overlay options to get a complete view of property’s past and present.

One-Day Turnaround

Fast and seamless mosaic delivery means your historical research is ready when you need it.

Certified & Licensed

A unique Sanborn certification number documents that you searched the complete LightBox collection and confirms you’re licensed to reproduce the map images directly in your report. Reports from LightBox-authorized resellers carry the same certification benefits.

Features & Capabilities

Data & Sources

  • The complete Sanborn Map® Library: Over 1.3 million fire insurance maps, the largest and most comprehensive Sanborn® collection in existence.
  • Detail-rich mapping: Street name changes, building footprints and construction details, roads, storage tanks, wells, occupant names, and property use at the time each map was drawn.

Coverage

  • Years covered: 1866 through 2007 Sanborn® publications. All available years for your subject property.
  • Geographic extent: Urban and industrial areas across the United States.

Deliverables & Access

  • Certified Sanborn Map® Report: Every report includes the Sanborn certification number validating a complete-collection search and licensing image reproduction.
  • LightBox Live: Review multiple years of coverage interactively with layering, opacity, and other historical overlay comparison tools.

Tools & Analysis

  • Area of Interest tool: Can be used to draw a boundary on the Sanborn Map to quickly identify adjoining properties per ASTM guidance.
  • Tagged records: Overlay City Directory tagged records for Gas Stations and Dry Cleaners to help bookend years of operation. Learn more
  • Integrated Analysis: Use Sanborn Maps with the Area of Interest, Opacity, Groundwater Flow, and Geometry Filter tools to quickly focus on the historical records most relevant to your review. Learn more

Integrations

Resources