Blog · October 14, 2026 · California
Reading the Chico Flood Zone Map for a parcel
The zone on FEMA's map affects insurance, building and resale near Paradise.
Main page: Butte County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Paradise? Checking the Chico flood zone map reveals whether the lot falls inside a mapped floodplain, and no account is needed. What this Chico guide covers: finding the address on FEMA's map, decoding A, AE and X, and matching it with the county parcel viewer.
Getting started with the Chico flood zone map
The official source is FEMA's Flood Map Service Center: type an address near Oroville, and pick the FIRMette or map view. A tract near Oroville without an address is still easy to locate: zoom in from the nearest road and click inside the land.
Where the parcel data lives
Go first to the Butte County parcel viewer; it covers every assessed parcel in the county, Oroville included. On ground around Biggs, type a street address, an owner's name or a parcel number, and the matching parcel lights up. With a lot near Gridley, write down the parcel ID from that panel; each records desk in the county uses it to find the file.
Getting answers from the right desk
If the acreage or value on a parcel near Biggs looks off belong with the County Assessor, since that office keeps the assessment data. Questions about what you can build around Paradise need the planning or permitting office, town or county, depending on location.
Beyond the mapped zones
Small streams around Biggs may not have detailed mapping, so look for water marks and debris lines. Marshy spots near Paradise can limit building too; check the National Wetlands Inventory mapper for a first look.
Where Chico fits in
Chico lies within Butte County, California, and the county assessor maps its lots. Local government in Chico handles things like zoning, permits and utilities within town limits, but the county runs assessment and recording. Land beyond the town limits toward Oroville usually answers to county rules, not municipal ones.
A short flood checklist
Ask the listing agent for any Elevation Certificate on the property near Gridley; getting a quote early keeps the budget honest.
What the zone letters mean
Zone AE comes with a base flood elevation, which plain A zones lack; builders around Gridley design to it. Around Biggs, a low-risk label isn't a guarantee: FEMA notes that many claims come from moderate- and low-risk areas.
Using it on a phone
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Biggs, though signal can drop in rural spots. A saved image of the lot near Oroville and its lines is a good backup.
Matching the zone to the lot lines
Where a floodplain cuts across acreage near Paradise, what matters is where the building sits.
Money questions tied to the zone
For land near Oroville, get the Elevation Certificate if one exists: it records the building's elevation against the base flood. Building or adding on near Biggs in a mapped zone usually means extra permit review; call the permitting office before you plan.
What the map can't tell you
Parcel lines are drawn for taxes, not surveyed, so a tree line near Paradise often sits several feet off the line on screen. For a parcel near Oroville, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Reading the legal description
California follows the Public Land Survey System, so deeds around Biggs reference sections and townships. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though real sections near Gridley vary in size. Copy the legal description from the record for the parcel near Oroville for any title or survey request.
Butte County in a few facts
Oroville is the county seat, which is where the courthouse records live. Smaller places on the map include Paradise, Biggs, and Gridley, where town lots give way to larger tracts. Roughly 207,172 people live in Butte County (Census estimate, 2023) spread over about 1,636 square miles. Features like Butte Sink National Wildlife Refuge help you orient on the aerial around Oroville.
Land on the county line
Butte County touches Colusa County, Glenn County, Plumas County, Sutter County, and Tehama County, all with their own assessor records. Acreage along the edge near Gridley can be split in two county records, so look at the adjacent map as well. For a parcel near Oroville, the Platbookmapper state page lists each neighboring county map for California.
Chico: common questions
Is AE a high-risk flood zone near Paradise?
It depends, but an AE zone has a 1% annual chance of flooding and a base flood elevation, which shapes building rules near Oroville.
Does the county parcel map show flood zones near Paradise?
For most people, some county viewers include a FEMA flood layer; confirm a lot near Oroville on FEMA's map either way.
What is a base flood elevation in Chico?
In most cases, a BFE near Oroville tells builders how high the lowest floor should be, and an Elevation Certificate compares the building to it.
Why did my flood zone near Paradise change?
A new study can move a zone line near Biggs; your community is notified before changes take effect.
Does the parcel map work on a phone for land near Paradise?
The map near Oroville usually works on a phone; screenshots help offline.
Open the official Butte County, CA 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.