Online database for New York City building/ property information

Mighty Map Front page offers information on recent property sales. (Professional edition is accessible onsite at SIBL through subscription. Ask a staff person to log in). Search by address, intersection, borough and block level, or locate a property on the map locator. Select and email site reports on NYC buildings and property including owners, tax liens, auctions, foreclosure sales, zoning, land use, traffic counts, subway locations, lis pendens, building permits, tax values and comparables. Includes data on building residents and businesses. Comps (deed transactions) are updated monthly.