Blog · October 14, 2026 · Pennsylvania
Beaver County Flood Zone Map (Pennsylvania)
Look up any Beaver County address on FEMA's flood map, read the zone, and match it to the parcel record for land around Aliquippa.
Main page: Beaver County, PA GIS & Parcel Viewer (official map link, Beaver County facts and neighboring maps).
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Land along the creek bottoms near Byersdale and the flats outside Bridgewater are where a Beaver County flood zone map lookup matters most. You can check it yourself for any Bridgewater address in a few minutes.
The sections below go from the FEMA search to the Beaver County parcel record, then cover insurance, permits and map changes near Ambridge.
Where to see the official Beaver County flood zone map
FEMA's official flood maps for Beaver County are free at the FEMA Flood Map Service Center. If a parcel near Baden has no street number yet, search the nearest road and pan to it. For an irregular lot near Baden, the National Flood Hazard Layer viewer is easier to use, which shows how much of a county parcel sits inside the zone. Switch to the Beaver County parcel viewer and locate the same parcel near Baden. Match the Beaver County lines and acreage to the FEMA view, since flood maps don't draw property lines in detail.
The county map you'll pair it with
For land around Baden, open the Beaver County parcel viewer; it's the map Beaver County itself publishes. Click any Beaver County parcel near Aliquippa to open its record: owner, parcel ID and assessed acreage are generally listed. Our Beaver County, PA page keeps the official link and the maps next door to Baden in one place.
Recorded documents in Beaver County, Pennsylvania
For land near Baden, the deed itself lives in the county recording office, and the map is an index to it. Easements and access rights near Ambridge live in recorded documents, so read the deed, not just the county map.
Zone A, AE and X in plain English
Any Beaver County parcel shaded as Zone A, AE, AH or AO sits in what FEMA calls a Special Flood Hazard Area, meaning FEMA estimates a 1-percent annual chance of flooding. Zone AE near Baden means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Land near Baden in shaded X (Zone B on older maps) is moderate risk, between the 1-percent and 0.2-percent annual chance lines. Clear, unshaded X near Bridgewater is outside the 500-year floodplain.
Getting oriented in Beaver County, PA
Beaver is the county seat, and Aliquippa, Beaver Falls, Ambridge, and Baden are among the other towns on the county map. Unincorporated communities in the county, including Frisco, Hazen, and Byersdale, show up as small groups of parcels along the roads. Census Bureau estimates put Beaver County at about 165,631 residents in 2023 on approximately 435 square miles of land. Much of Beaver County is built out, so most clicks near Big Beaver land on platted lots.
Unmapped creeks in Beaver County
A low spot on a Beaver County tract outside any mapped zone, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
Neighboring maps around Beaver County
Near the edge of the county, check the next map over: Columbiana County, OH, Allegheny County, Butler County, Lawrence County, and Washington County all border it. Our Pennsylvania page links each map neighboring Beaver County.
Insurance, permits and map changes
Here's why the zone matters at a closing in Bridgewater. If a barn or house outside Bridgewater sits in a Special Flood Hazard Area and secures a loan from a federally regulated or insured lender, federal rules call for flood insurance, as long as Beaver County or the town participates in the NFIP. Outside the A zones around Baden, insurance is a choice, not a mandate, though a lender in Pennsylvania can still ask for it. When a Beaver County homesite is on a rise inside a mapped zone, a Letter of Map Amendment request is the formal route, generally backed by an elevation certificate from a surveyor who works in Beaver County. Adding on to a house near Baden inside the zone has to meet local floodplain rules, and the building office serving Baden explains the steps.
Quick answers for Beaver County
Is there a floodplain layer in the Beaver County parcel viewer?
Some county viewers carry a flood layer, but FEMA's Flood Map Service Center is the official source for Beaver County.
What is a base flood elevation for a Beaver County property?
On the map covering Big Beaver, the BFE is the height floodwater is expected to reach in the 1-percent-annual-chance flood, and a surveyor compares the building near Big Beaver to it.
How do I challenge a flood zone for a lot in Big Beaver?
FEMA reviews requests such as a LOMA for Beaver County properties; start with an elevation certificate.
What does Zone AE mean on a Beaver County flood map?
For a Beaver County parcel, Zone AE means a Special Flood Hazard Area with a 1-percent annual chance of flooding and a published base flood elevation.
Is flood insurance required for a Zone X lot in Big Beaver?
For a Zone X house near Bridgewater, federal rules don't require flood insurance; buying it is still a choice worth pricing.
Can I build in a flood zone in Beaver County?
Often, but local floodplain rules apply; ask the county or town building office in Big Beaver before you buy.
Open the official Beaver County, PA parcel map Beaver County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.