What FEMA flood zones are

FEMA maps the country into flood zones based on modeled flood risk. The zone a parcel falls in determines whether federally-backed mortgage lenders require flood insurance, and often affects how (or whether) you're allowed to build.

Zone AE specifically

Zone AE is part of the "Special Flood Hazard Area" — land with at least a 1% annual chance of flooding (commonly called the "100-year floodplain") — and unlike Zone A, it has a determined Base Flood Elevation (BFE): the height floodwater is expected to reach in that 1%-annual-chance event. That BFE number is what drives insurance rates and construction requirements.

How it compares to other zones

• Zone X: minimal flood risk — no flood insurance requirement from lenders
• Zone A: same 1% annual risk as AE, but no BFE has been calculated
• Zone AE: 1% annual risk, with a determined BFE
• Zone VE: coastal high-hazard area — wave action in addition to flooding, the strictest building requirements

What it means if you build here

Most jurisdictions require any new structure in Zone AE to have its lowest floor built at or above the BFE, often with an added freeboard margin — which can mean building on fill, piers, or an elevated foundation. That adds real construction cost. Flood insurance is typically required if you finance with a federally-backed loan, and premiums can be significant depending on the elevation relative to the BFE.

Does it mean don't buy?

Not automatically. Plenty of homes are built and insured in AE zones every year. What it means is you need to budget for elevated construction and ongoing insurance cost, and understand exactly where the parcel sits relative to the BFE before you commit. An elevation certificate — a surveyed measurement of the parcel's actual elevation — is worth getting if you're seriously considering building here.

How to check a specific parcel

FEMA's Flood Map Service Center is free and public. LandPilot also pulls this automatically as part of every analysis, so you can see it alongside everything else before you dig further.