MapGrid

MapGrid pulls the scattered layers of property due diligence onto a single interactive map. Its Overlay Stacker toggles more than 30 regulatory layers, flood zones, wetlands, environmental sites, stream buffers, so every constraint on a site is visible at once, and parcels across 17 states and Washington DC carry address, property class, assessed value and acreage. Environmental risk scoring pulls EPA Superfund, Brownfields, RCRA and TRI records plus state data into a 0 to 100 score per parcel, which is the difference between knowing what you’re buying and inheriting somebody else’s liability.

Two features do genuine work rather than just displaying data. The Net Buildable calculator subtracts wetlands, stream buffers, flood hazard areas, conservation easements and preserved open space from a parcel to show what’s actually developable. ASTM radius reports are auto-assembled to E1527-21 standard distances, which the company reckons saves consultants four to eight hours per Phase I. There’s also a tax sale calendar aggregating county listings, free to browse, filterable by state, county and date.

It’s built for specific professionals, tax-lien investors, environmental consultants and LSRPs, developers and planners, rather than anyone wanting a general map. Usefully, it’s candid about coverage: parcel data goes only as far as each state’s own feed publishes, normalized zoning covers selected counties and municipalities rather than full states, and the footer states plainly that it isn’t a substitute for a professional survey or a Phase I ESA. The free Explorer tier gives 10 parcel lookups a day with no card, then Solo is $39/month, Pro $99, and Team $299, each with a 14-day trial and two months free on annual.