Blog · October 14, 2026 · California
Solano County Flood Zone Map (California)
FEMA's free flood maps and the Solano County parcel viewer, used together for property near Vallejo.
Main page: Solano County, CA GIS & Parcel Viewer (official map link, Solano County facts and neighboring maps).
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Land along the creek bottoms near Green Valley and the flats outside Vallejo are where a Solano County flood zone map lookup matters most. FEMA's free Flood Map Service Center and the Solano County parcel viewer answer it together.
The sections below go from the FEMA search to the Solano County parcel record, then cover insurance, permits and map changes near Fairfield.
How to check the Solano County flood zone map
Open the FEMA Flood Map Service Center and type a county street address, say one in Suisun City. If a tract around Benicia has no street number yet, search the nearest road and pan to it. If the PDF panel for Solano County is hard to read, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery, which lists how much of a Solano County parcel sits inside the zone. Switch to the Solano County parcel viewer and locate the same tract around Benicia. If the Solano County viewer has a floodplain layer, treat it as a convenience copy and confirm on FEMA's map.
Search Solano County parcels by owner, address or ID
For land around Rio Vista, open the Solano County parcel viewer; it's the map Solano County itself publishes. Most people locate their Solano County tract fastest by searching an address in Rio Vista, then clicking the outline. Bookmark our Solano County page too; it tracks the official California link if it moves and lists the maps around Dixon.
Reading the zones on a Solano County flood map
For a lot in Suisun City, the label matters more than the color: A and V zones are Special Flood Hazard Areas, meaning FEMA estimates a 1-percent annual chance of flooding. Zone AE near Benicia means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Shaded Zone X around Suisun City is moderate risk, between the 1-percent and 0.2-percent annual chance lines. Unshaded X (or C) on the Solano County panel means minimal risk.
Near the Solano County line
A farm near the county line can carry separate records in Contra Costa County, Marin County, and Napa County as well. Every map bordering Solano County is listed on our California directory.
Low ground and small streams around Suisun City
A creek near Benicia that lists no detailed zone, which is why it's worth walking the ground after a heavy rain.
A short buyer checklist for Rio Vista
Request any past flood claims history for a Solano County property before closing; it tells you more than the map alone. Then call an insurance agent who writes policies around Rio Vista and get a quote using the zone and the county parcel address.
When the map affects a deal
Lenders watch the zone closely on Solano County properties. If a barn or house outside Suisun City falls inside an A or V zone and secures a loan from a federally regulated or insured lender, flood insurance is mandatory; that applies where the local government around Benicia is in the National Flood Insurance Program. Outside the A zones around Benicia, federal rules don't require a policy, although a lender in California can still ask for it. If a building near Benicia sits above the flood line, a Letter of Map Amendment request is the formal route, supported by elevation data from a licensed land surveyor. New construction in a Solano County Special Flood Hazard Area often requires a permit and an elevation check, so call the county or the town office in Suisun City before work starts.
Solano County flood zones questions
Is flood insurance required for a Zone X lot in Suisun City?
FEMA doesn't require it for a Zone X lot in Suisun City, but coverage is available and some lenders ask for it.
Do I need a permit to build in the floodplain near Suisun City?
Building in a Special Flood Hazard Area near Suisun City generally needs a floodplain permit and may require elevating the structure, so check with the county floodplain administrator.
Does the Solano County parcel map display flood zones?
Check the layer list in the Solano County parcel viewer; if Solano County includes a floodplain layer, confirm the zone on FEMA's map anyway.
What does 100-year flood mean for Solano County land?
No, ground around Suisun City mapped that way has a 1-percent chance of flooding every year, and two floods in one decade near Suisun City are possible.
What does Zone AE mean on a Solano County flood map?
Yes, a tract around Fairfield in Zone AE is high risk: a 1-percent-annual-chance floodplain where FEMA lists a base flood elevation.
Who prepares an elevation certificate for a house in Suisun City?
Hire a licensed land surveyor or engineer who works in Solano County; ask the local floodplain office first in case one exists.
Open the official Solano County, CA parcel map Solano County 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.