Blog · October 14, 2026 · Iowa
Cerro Gordo County Flood Zone Map: checking a property's flood zone
The zone on FEMA's map affects insurance, building and resale near Portland.
Main page: Cerro Gordo County, IA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Portland, check the Cerro Gordo County flood zone map: FEMA's zone label affects insurance, permits and resale. This county guide covers: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the county Beacon site, especially near Cameron.
Where the Cerro Gordo County flood zone map lives
If the land is near Dougherty, flood zones come from FEMA's Flood Map Service Center: enter the street address, then open the map view for that panel. A tract near Mason City without an address can still be found: search the nearest road and click the spot.
The free map to start with
Lots and tracts near Mason City can be looked up on the Cerro Gordo County Beacon site, a viewer that needs no account. In and around Meservey, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. For a home near Burchinal, copy the parcel ID from that panel; each records desk in the county uses it to find the file.
Sections, lots and bearings
Iowa follows the Public Land Survey System, so rural legal descriptions near Mason City cite 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 Rockwell vary in size. Keep the legal description for land near Rockwell when you talk to a surveyor.
Reading A, AE and X
Zone AE comes with a base flood elevation, which plain A zones lack; builders around Clear Lake design to it. If you're looking near Burchinal, a shaded X area is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X is minimal risk.
Parcel lines plus flood zones
FEMA's map shows zones but not ownership, so pair it with the Cerro Gordo County Beacon site for the outline of the tract near Mason City.
Before you lean on the lines
Closer to Emery, the acreage figure is a tax-roll number; just a licensed surveyor establishes the real corners on the ground. Near Rockwell, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Money questions tied to the zone
With a lot near Dougherty, an Elevation Certificate from a surveyor helps: it records the building's elevation against the base flood. New construction in a floodplain near Meservey can trigger elevation rules; check with the county or town building office before you plan.
The paper trail behind a parcel
With a lot near Meservey, the map is an index, not the title: deeds, plats and easements for parcels in the county are filed with the County Recorder. Out toward Rock Falls, have ready the book and page shown in the record panel and the lookup takes minutes.
Offices that can help
Deeds, mortgages and recorded plats for land near Burchinal are with the County Recorder, usually searchable by name or document number. Questions about what you can build around Rockwell need the planning or permitting office, and the answer depends on jurisdiction.
Places you'll see on the map
Mason City serves as the county seat, home to the main records offices. Smaller places on the map include Clear Lake, Dougherty, Meservey, and Plymouth. Around 42,406 people call Cerro Gordo County home (Census Bureau estimate, 2023) on about 568 square miles. The county dates to 1851, and some chains of title near Cartersville are long.
Next door to Cerro Gordo County
The county borders Butler County, Floyd County, Franklin County, Hancock County, and Mitchell County; every one of them runs a separate parcel map for land near Burchinal. Acreage along the edge near Cartersville can show up in two county records, so check the adjacent map too. On ground around Portland, the Platbookmapper state page links each bordering county map across Iowa.
Beyond the mapped zones
Low-lying fields near Dougherty aren't always studied in detail, so walk the land after rain. Marshy spots near Rockwell can limit building too; check the National Wetlands Inventory mapper for a first look.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Burchinal, though signal can drop in rural spots. A printout of the tract near Plymouth keeps working without signal.
What to request from a seller
For a home near Plymouth, ask the listing agent for any Elevation Certificate before closing; getting a quote early avoids surprises.
Questions about the Cerro Gordo County flood zone map
Is AE a high-risk flood zone in Cerro Gordo County?
For most people, AE is a Special Flood Hazard Area with a published base flood elevation, which shapes building rules near Mason City.
How often are flood maps updated near Clear Lake?
In and around Portland, FEMA revises flood maps panel by panel as new studies finish; your community is notified before changes take effect.
Does the county parcel map show flood zones for land near Clear Lake?
A flood layer may appear in the Cerro Gordo County Beacon site layer list, but FEMA's own map is the official source.
What is a base flood elevation around Rockwell?
On ground around Rock Falls, the BFE is printed in AE zones on FEMA's map, and an Elevation Certificate compares the building to it.
What's the tax parcel number used for near Clear Lake?
It's the number the County Assessor uses to track a tract near Cameron, and it's on the record panel and tax bills.
Open the official Cerro Gordo County, IA 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.