Here are a few of our favorite online resources for Real Estate Due Diligence research

Aerial Photographs – http://www.terraserver.com/ http://www.pennpilot.psu.edu/ (Pennsylvania Aerials)

Location Maps – http://maps.google.com/

Flood Hazards – http://www.fema.gov/

Topographic Maps – http://www.topozone.com/  

Wetlands Maps – http://wetlands.fws.gov/

Geologic Maps of US States – https://mrdata.usgs.gov/geology/state/

Physiographic Provinces – https://www.nps.gov/subjects/geology/physiographic-provinces.htm

Soils Reference – http://soils.usda.gov/

State and Local Government Records – http://www.statelocalgov.net/index.cfm

State Radon Levels –http://radon.com/radon/radon_map.html

Tax and Property Records – http://publicrecords.netronline.com