Blog · October 14, 2026 · California
Oroville Flood Zone Map: checking a property's flood zone
Flood zones are set by FEMA, and checking one near Biggs takes a few minutes.
Main page: Butte County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Paradise, check the Oroville flood zone map: FEMA's zone label affects insurance, building rules and resale. In this Oroville guide: locating a parcel on FEMA's map, decoding A, AE and X, and confirming the outline on the county map.
The Oroville flood zone map: start here
The official source is FEMA's Flood Map Service Center: search an address around Biggs, and pick the FIRMette or map view. Rural land near Chico with no street number is still easy to locate: zoom in from the nearest road then click the parcel area.
Opening the official parcel viewer
Go first to the Butte County parcel viewer; it maps each tax parcel in the county, Gridley included. If the land is near Chico, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. For a tract near Gridley, the parcel card normally shows the owner of record, assessed acreage, a parcel ID and in many cases the last transfer.
Oroville, CA: the basics
Oroville is part of Butte County, California, so its parcels are on the county's map. Oroville is also the county seat, handy when you need recorded documents. For a parcel near Paradise, the municipality handles things like zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Lots just outside the city limits out by Chico often follows county rules instead.
Reading A, AE and X
Out toward Chico, any A or V zone are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any year. For acreage around Paradise, minimal risk is not no risk: according to FEMA, floods happen outside mapped zones too.
Offices that can help
Deeds, mortgages and recorded plats for land near Biggs come from the County Recorder, usually searchable by name or document number. Zoning, permits and septic questions near Chico go to planning, building or health offices, and the answer depends on jurisdiction.
Getting your bearings
Oroville is the county seat, home to the main records offices. Smaller places on the map include Biggs, Gridley, Paradise, and Chico, where town lots give way to larger tracts. About 207,172 people call Butte County home (Census estimate, 2023) spread over about 1,636 square miles. Features like Butte Sink National Wildlife Refuge make handy reference points on the map near Gridley.
The paper trail behind a parcel
The map is an index, not the title: recorded deeds, subdivision plats and easements for land near Biggs are filed with the County Recorder. Inherited tracts around Biggs may go back through many deeds, and a title company is worth hiring if money is changing hands.
A word on accuracy
Acreage on the record is a tax-roll number; only a licensed surveyor sets the real lines on land around Gridley. For a home near Biggs, records update in batches, so a deed recorded last month can take weeks to appear.
Matching the zone to the lot lines
When the zone clips a corner of a lot near Biggs, the structure's footprint is the key question.
Sections, lots and bearings
California uses the Public Land Survey System, so rural legal descriptions near Gridley cite section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though sections near Gridley can be irregular. Write down the legal description for the tract near Gridley before you request a deed or survey.
Questions to ask before you buy
Ask the listing agent whether the home has flooded for the house near Paradise; getting a quote early keeps the budget honest.
Money questions tied to the zone
With a lot near Chico, an Elevation Certificate from a surveyor helps: it can change the insurance price a lot. New construction in a floodplain near Biggs often needs a floodplain permit; check with the county or town building office before you plan.
Land on the county line
Butte County meets Colusa County, Glenn County, Plumas County, Sutter County, and Tehama County; every one of them runs a separate parcel map. Ground near Biggs that runs to the line may be split across two assessors' files, so open the adjacent map too. For a parcel near Chico, our state page lists every bordering county map for California.
Beyond the mapped zones
Small streams around Paradise aren't always studied in detail, so ask neighbors about past flooding. Wet ground around Biggs is a separate issue from flood zones; check the National Wetlands Inventory mapper for a first look.
Frequently asked
What is a base flood elevation around Gridley?
Generally, a BFE near Paradise tells builders how high the lowest floor should be, and an Elevation Certificate compares the building to it.
Is flood insurance mandatory near Biggs?
For a building near Chico in an A or V zone with a federally backed or regulated mortgage, it's generally required; outside those zones it's your call.
Do I need to worry about flooding in Zone X around Biggs?
Good question; Zone X near Gridley means moderate (shaded) or minimal (unshaded) mapped risk; FEMA notes that a large share of claims come from these areas.
Does the county parcel map show flood zones around Gridley?
It depends, but the parcel map near Paradise might show FEMA zones, but FEMA's own map is the official source.
Is the parcel map a survey around Chico?
The map near Chico is approximate.
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.