Blog · October 14, 2026 · Wisconsin
Hudson Flood Zone Map, Wisconsin: a practical guide
Flood zones are set by FEMA, and checking one near Roberts takes a few minutes.
Main page: St. Croix County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Ahead of any purchase around Somerset, look at the Hudson flood zone map: FEMA's zone label affects insurance, building rules and resale. In this town guide: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the St. Croix County Beacon site for land near Hammond.
Checking the Hudson flood zone map step by step
Start with FEMA's Flood Map Service Center: search an address around Hammond, and choose the dynamic map. A tract near New Richmond without an address can still be found: pan from the closest town and click the spot.
The free map to start with
Lots and tracts near Hammond are published on the St. Croix County Beacon site, a viewer that needs no account. With a lot near Hammond, type a street address, an owner's name or a parcel number, and the viewer zooms to the match. For property near River Falls, write down the parcel ID while you have it open; each records desk in the county asks for it first.
Neighboring parcel maps
St. Croix County meets Washington County, MN, Barron County, Dunn County, Pierce County, and Polk County, all with their own assessor records. A tract near the line by Hammond may be split in two county records, so open the adjacent map as well. For acreage around Hammond, our state page links each neighboring county map for Wisconsin.
City limits and county records
The town sits in St. Croix County, Wisconsin, so its parcels are on the county's map for land near River Falls. As the county seat, Hudson hosts the courthouse, so deeds and plats are filed in town. Closer to Hammond, the municipality handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Land beyond the city limits toward Roberts often falls under county rules, not municipal ones.
What the zone letters mean
An AE label carries a published BFE, which plain A zones lack; that elevation drives building rules near River Falls. Out toward North Hudson, minimal risk is not no risk: according to FEMA, many claims come from moderate- and low-risk areas.
Deeds, plats and who keeps them
When the details count, request the recorded deed through the Register of Deeds; the parcel map near Roberts only summarizes it. Long-held tracts near North Hudson may trace back through a long string of deeds, so a title company earns its fee on a real sale.
Lining it up with the parcel map
FEMA doesn't draw property lines, so open the St. Croix County Beacon site next to confirm you have the right parcel near North Hudson.
A short flood checklist
Ask the seller about past flood claims for the house near River Falls; an insurance quote early keeps the budget honest.
Using it on a phone
The parcel map usually runs in a mobile browser, which helps when you're standing on land near River Falls, so load it before you lose signal. A printout of the tract near River Falls is a good backup.
Offices that can help
If the acreage or value on a parcel near North Hudson looks off are handled by the county real property listing office, since that office keeps the assessment data. Questions about what you can build around Hammond need the planning or permitting office, town or county, depending on location.
Beyond the mapped zones
Creeks and ditches near North Hudson aren't always studied in detail, so ask neighbors about past flooding. Wetlands near River Falls can limit building even outside a flood zone; check the National Wetlands Inventory mapper for a first look.
Money questions tied to the zone
For a structure inside an A or V zone and a federally regulated lender is involved, the lender will require flood insurance in communities in the NFIP, which applies near New Richmond as much as anywhere. Building or adding on near North Hudson in a mapped zone usually means extra permit review; call the permitting office early.
Places you'll see on the map
The town is the county seat, where most land records are kept, at least around Baldwin. Smaller places on the map include North Hudson, River Falls, Roberts, and Somerset. Around 96,763 people live in St. Croix County (Census Bureau estimate, 2023) spread over about 722 square miles. St. Croix County was organized in 1849, and some chains of title near River Falls are long.
Frequently asked
How often are flood maps updated in Hudson?
For most people, a new study can move a zone line near Roberts; your community is notified before changes take effect.
Is there a flood layer on the parcel viewer near River Falls?
Good question; a flood layer may appear in the St. Croix County Beacon site layer list, but FEMA's own map is the official source.
What does an AE label mean for a lot near Somerset?
It depends, but an AE zone has a 1% annual chance of flooding and a base flood elevation, which shapes building rules near New Richmond.
Will my lender require flood insurance near Somerset?
For most people, lenders generally require it for buildings near Roberts in a Special Flood Hazard Area when the loan is federally regulated or insured; outside those zones it's your call.
Is the parcel map a survey around Roberts?
The map near New Richmond is approximate, so a fence may sit off the line
Open the official St. Croix County, WI 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.