Blog · October 14, 2026 · Missouri
Using the Valley Park Flood Zone Map
The zone on FEMA's map affects insurance, building and resale near Des Peres.
Main page: St. Louis County, MO GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Winchester? Checking the Valley Park flood zone map reveals whether it sits in a FEMA flood zone, and no account is needed. Covered here for Valley Park: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the St. Louis County ArcGIS parcel map.
Getting started with the Valley Park flood zone map
Start with FEMA's Flood Map Service Center: type an address near Twin Oaks, and choose the dynamic map. A tract near Ballwin without an address is still easy to locate: zoom in from Interstate 64 and click the spot.
Pulling up a parcel
Your first stop is the St. Louis County ArcGIS parcel map; it maps each assessed parcel around Twin Oaks and Des Peres. When a rural tract has no street number, zoom in from Fenton and select the outline. Closer to Des Peres, write down the parcel ID before closing the panel; each clerk in the county asks for it first.
Deeds, plats and who keeps them
For anything that matters, get the recorded deed through the Recorder of Deeds; the parcel map near Winchester only summarizes it. For acreage around Winchester, use the book and page shown in the record panel so staff can find the deed fast.
Where Valley Park fits in
Valley Park lies within St. Louis County, Missouri, and the county assessor maps its lots. For acreage around Twin Oaks, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Acreage past the city limits near Manchester often follows county rules instead.
Water near Ballwin
Creeks and ditches near Fenton aren't always studied in detail, so walk the land after rain. Wet ground around Fenton is a separate issue from flood zones; check the National Wetlands Inventory mapper for a first look.
Reading A, AE and X
Zone AE comes with a base flood elevation, while plain Zone A does not; builders around Fenton design to it. Around Twin Oaks, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
A short flood checklist
Ask the seller for any Elevation Certificate on the property near Twin Oaks; an insurance quote early avoids surprises.
Which office to call
If the acreage or value on a parcel near Manchester looks off are handled by the County Assessor, since that office keeps the assessment data. Questions about what you can build around Twin Oaks are for the local planning and health departments, town or county, depending on location.
Matching the zone to the lot lines
FEMA's map shows zones but not ownership, so pair it with the St. Louis County ArcGIS parcel map to see exactly which lot near Des Peres you're looking at.
Using it on a phone
Most viewers work in a phone browser, handy when you're parked on a road near Des Peres, though signal can drop in rural spots. A screenshot of the parcel near Des Peres with its ID is a good backup.
Neighboring parcel maps
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. Ground near Manchester that runs to the line can be split across two assessors' files, so check the neighboring map as well. Out toward Des Peres, the Platbookmapper state page lists every bordering county map for Missouri.
How land is described here
Missouri is laid out under the Public Land Survey System, so rural legal descriptions near Twin Oaks cite section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though real sections near Manchester vary in size. Copy the legal description from the record for the parcel near Winchester when you talk to a surveyor.
Insurance, lenders and building
For a home near Fenton, ask for an Elevation Certificate: it compares the building to the BFE. Remodeling a house in a zone near Fenton can trigger elevation rules; call the permitting office early.
Frequently asked
Do I need flood insurance in Valley Park?
Short answer: lenders generally require it for buildings near Des Peres in a Special Flood Hazard Area when the loan is federally regulated or insured, in communities that take part in the NFIP.
How often are flood maps updated around Ballwin?
Good question; a new study can move a zone line near Des Peres; your community is notified before changes take effect.
How can I tell if a house near Manchester is in a flood zone?
Generally, look up the spot near Fenton in FEMA's National Flood Hazard Layer viewer, and the zone code appears on the map.
Is AE a high-risk flood zone near Des Peres?
It depends, but AE is a Special Flood Hazard Area with a published base flood elevation, so builders near Manchester design to that elevation.
Why do offices ask for the parcel ID around Manchester?
The parcel ID identifies one tax parcel near Des Peres; you'll see it in the viewer and on tax statements.
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.