Blog · October 14, 2026 · Missouri
Hazelwood Flood Zone Map: checking a property's flood zone
The zone on FEMA's map affects insurance, building and resale near Champ.
Main page: St. Louis County, MO GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before an offer near Champ, pull up the Hazelwood flood zone map: the zone on that map shapes insurance, building rules and resale. What this Hazelwood guide covers: finding the address on FEMA's map, reading the zone codes, and pairing it with the St. Louis County ArcGIS parcel map.
The Hazelwood flood zone map: start here
Start with FEMA's Flood Map Service Center: type an address near Champ, and choose the dynamic map. A tract near St. Ann without an address can still be found: zoom in from Interstate 64 and click inside the land.
Opening the official parcel viewer
Property in and around St. Ann can be looked up on the St. Louis County ArcGIS parcel map, a viewer that needs no account. For land near Champ, put in a street address, an owner's name or a parcel number, then pick the result to center the map on it. For a home near Berkeley, a pop-up or side panel normally shows the owner of record, acreage on the tax roll, the parcel number and in many cases the last transfer.
A short flood checklist
Ask the seller about past flood claims for the house near St. Ann; getting a quote early avoids surprises.
Hazelwood, MO: the basics
Hazelwood lies within St. Louis County, Missouri, so its parcels are on the county's map. Closer to Champ, the municipality handles things like zoning, permits and utilities within town limits, but the county runs assessment and recording. Lots just outside the town limits near Edmundson generally follows county rules rather than the town's.
Recorded documents worth pulling
For anything that matters, request the recorded deed through the Recorder of Deeds; the parcel map near Edmundson only summarizes it. Long-held tracts near Champ may sit on a long string of deeds, and a title company can sort it out on a real sale.
When a parcel crosses a boundary
St. Louis County borders Madison County, IL, Monroe County, IL, St. Clair County, IL, Franklin County, and Jefferson County; every one of them runs a separate parcel map. A tract near the line by Florissant may be split across two assessors' files, so open the adjacent map before you assume the acreage. For land near Edmundson, our state page links every neighboring county map across Missouri.
Who handles what
Questions about value or the owner field for land near Berkeley belong with the County Assessor, since that office keeps the assessment data. Questions about what you can build around St. Ann need the planning or permitting office, town or county, depending on location.
Water near Bridgeton
Creeks and ditches near Bridgeton aren't always studied in detail, so ask neighbors about past flooding. Marshy spots near Edmundson can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Decoding the flood zone labels
An AE label includes a base flood elevation (BFE), and an unnumbered A zone has none; builders around Edmundson design to it. On ground around St. Ann, a low-risk label isn't a guarantee: according to FEMA, floods happen outside mapped zones too.
Lining it up with the parcel map
FEMA's map shows zones but not ownership, so open the St. Louis County ArcGIS parcel map next to confirm you have the right parcel near St. Ann.
Field tips
Most viewers work in a phone browser, useful out on a road near Edmundson, though signal can drop in rural spots. A screenshot of the parcel near St. Ann with its ID keeps working without signal.
Sections, lots and bearings
Missouri is laid out under the Public Land Survey System, which means a tract near Berkeley is described by section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though real sections near Florissant vary in size. Write down the legal description for the tract near St. Ann for any title or survey request.
Lenders and permits
If a building sits in a Special Flood Hazard Area and a federally regulated lender is involved, flood insurance is generally required where the community participates in the National Flood Insurance Program, and that holds around Edmundson too. Building or adding on near Berkeley in a mapped zone can trigger elevation rules; check with the county or town building office early.
Quick answers
What if the flood map is wrong for my lot near St. Ann?
For most people, you can ask FEMA for a LOMA if surveyed elevations show the building near Florissant is above the BFE; a surveyor's elevation data supports it.
Does the county parcel map show flood zones in Hazelwood?
A flood layer may appear in the St. Louis County ArcGIS parcel map layer list; confirm a lot near Edmundson on FEMA's map either way.
What is a base flood elevation in Hazelwood?
Usually, a BFE near Edmundson tells builders how high the lowest floor should be; surveyors near Bridgeton use it often.
What does Zone AE mean near Bridgeton?
In most cases, an AE zone has a 1% annual chance of flooding and a base flood elevation, so builders near Champ design to that elevation.
What's the tax parcel number used for near Bridgeton?
It's the number the County Assessor uses to track a tract near Berkeley, and it's on the record panel and tax bills.
Open the official St. Louis County, MO parcel map See it 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.