Wisconsin · Door County

Door County Flood Insurance & the New FEMA Maps

The new Flood Insurance Rate Maps for Door County, Wisconsin took effect March 17, 2026. Many lakeshore parcels moved into Zone AE or Zone VE. Here's what changed, what it costs, and how we help you compare NFIP and private flood options.

⚠ The new maps are now effective

If your Door County property moved into a high-risk zone (AE or VE) under the 2026 update, and you carry a federally backed mortgage, your lender is now required to enforce the flood insurance purchase requirement. You typically have 45 days from the lender's notice to obtain coverage before the lender purchases force-placed coverage on your behalf.

What changed in Door County under the 2026 maps

Door County sits on a peninsula between Green Bay to the west and Lake Michigan to the east. Both shorelines were reassessed under FEMA's Great Lakes Coastal Flood Study. The 2026 update reflects modern wave runup modeling, updated Great Lakes water level data, and storm surge analysis that did not exist when the previous maps were drawn.

Key changes on the Lake Michigan side

Properties along the open Lake Michigan shoreline — from Baileys Harbor north through Sister Bay and Ellison Bay — saw the most significant rezoning. Many parcels that were previously Zone AE were redesignated Zone VE (coastal high-hazard) to reflect potential wave action of three feet or more during a base flood event. A smaller number of properties previously in Zone X were brought into Zone AE.

Key changes on the Green Bay side

Properties from Sturgeon Bay north through Egg Harbor, Fish Creek, and Ephraim were reassessed for Green Bay storm surge and ice-driven flooding. Most Green Bay-side properties remained in Zone AE rather than moving to VE, reflecting the more sheltered wave environment compared to the open lake. Some properties moved from Zone X (low-to-moderate risk) into Zone AE based on updated base flood elevations.

Communities affected

The 2026 maps cover all incorporated and unincorporated communities in Door County, including the City of Sturgeon Bay; the Villages of Egg Harbor, Ephraim, Forestville, and Sister Bay; and the Towns of Baileys Harbor, Clay Banks, Forestville, Gibraltar, Gardner, Jacksonport, Liberty Grove, Nasewaupee, Sevastopol, Sturgeon Bay, Union, and Washington (Washington Island).

Source: FEMA Letters of Final Determination — 2026; Wisconsin DNR Floodplain Mapping program. The Letter of Final Determination was issued September 17, 2025; effective date March 17, 2026.

How the FEMA notification process worked

Letter of Final Determination (LFD)

FEMA issued the Letter of Final Determination to Door County community officials on September 17, 2025. The LFD is the formal notice that begins the six-month adoption period required before new Flood Insurance Rate Maps can take effect. During that period, each incorporated and unincorporated community is required to adopt or update a compliant floodplain management ordinance to remain in good standing with the National Flood Insurance Program.

After the LFD, FEMA published the final notice in the Federal Register, and the new FIRMs became effective on March 17, 2026. Property owners who received notification from their lender after that effective date are now subject to the flood insurance purchase requirement if their property is in a high-risk zone and the mortgage is federally backed.

What the lender's notice looks like

The standard lender notice is a Special Flood Hazard Determination Form, sometimes called a "47-day notice" or "force-placement notice." It identifies the property, the new flood zone designation, the lender's required coverage minimum (typically the lesser of the loan principal or the NFIP maximum), and a deadline by which proof of coverage must be provided.

If you've received one of these notices for a Door County property, the most important step is to get an independent flood quote before the deadline. Lender-placed coverage is almost always more expensive than what you can secure yourself through NFIP or a private flood carrier.

What flood insurance costs in Door County

Under FEMA's Risk Rating 2.0 methodology, premiums are based on each property's specific characteristics rather than its zone alone. Distance to the nearest flood source, ground elevation relative to base flood elevation, foundation type, replacement cost, and the structure's flood history all matter. The ranges below are general planning estimates for residential property in Door County and should not be relied on as a quote.

Private flood insurance is often, though not always, 20–40% less than NFIP for higher-value homes in moderate zones, and frequently offers higher coverage limits (NFIP caps building coverage at $250,000 for residential; private markets routinely write $500,000 to $1,000,000+). For older lakeshore cottages, manufactured homes, or properties with prior flood claims, NFIP is sometimes the only option. There is no general rule — we run both quotes side-by-side and the cheaper-or-better option becomes obvious.

What you should do this week if you received a letter

  1. Check your new flood zone. Use our free Flood Zone Lookup tool to see the official 2026 zone designation for your Door County address. The tool pulls live from FEMA's National Flood Hazard Layer.
  2. Don't wait for your mortgage company's 45-day clock to run out. The penalty for missing the deadline is force-placed coverage at the lender's chosen carrier, which is almost always substantially more expensive. Acting in week one rather than week five gives you a real chance to compare and choose.
  3. Get both an NFIP quote and a private flood quote. We do this comparison free of charge. The private market has expanded substantially in Wisconsin since 2022 and is competitive on many Door County properties.
  4. Consider whether an Elevation Certificate is worth it. If your property's lowest adjacent grade appears to be above the Base Flood Elevation, a licensed Wisconsin surveyor can prepare an Elevation Certificate (typical cost $400–$800). With that document, you may qualify for a Letter of Map Amendment (LOMA) from FEMA — which can remove the flood insurance requirement entirely. LOMA requests themselves are free; only the surveyor's certificate costs money.
  5. Call us at (920) 785-5019. We have been writing flood policies in Wisconsin since 2006 and have specific experience with Door County properties on both shorelines.

Understanding the Door County zone designations

Zone VE — Coastal High Hazard

The highest-risk designation, applied to coastal areas where wave heights of 3 feet or more are expected during the base flood event. Many Door County properties fronting open Lake Michigan are now Zone VE. Construction in VE zones must meet specific elevation and structural requirements under Wisconsin floodplain ordinances; lender insurance requirements are also stricter.

Zone AE — High-Risk Inland and Sheltered Coastal

Areas with a 1% annual chance of flooding where Base Flood Elevations have been established but wave hazards are below the 3-foot VE threshold. Most Door County Green Bay-side properties that are mapped in a Special Flood Hazard Area fall into AE rather than VE. Coverage is required for federally backed mortgages.

Zone X (Shaded) — Moderate Risk

Areas of 0.2% annual chance flooding (the "500-year flood" zone) or areas of 1% annual chance flooding with average depths less than one foot. Flood insurance is not federally required in Zone X, but rates are typically very affordable and many Door County homeowners purchase Preferred Risk Policies for properties in this zone.

Zone X (Unshaded) — Minimal Risk

Areas determined to be outside the 0.2% annual chance floodplain. Insurance is not required and not commonly purchased, though some coverage is still available through NFIP Preferred Risk Policies and private markets.

Get a Door County flood quote in under 24 hours

We compare NFIP and the private flood market for your specific property. No obligation, no pressure.

Start My Quote →
or call us directly at (920) 785-5019

Why work with us on Door County flood insurance

Our agency has been writing insurance in Wisconsin since 2006 and is licensed across Wisconsin, Florida, Illinois, Michigan, and Tennessee. Flood is our specialty — not an add-on. We've placed coverage on Door County properties in Sturgeon Bay, Egg Harbor, Fish Creek, Ephraim, Sister Bay, and Baileys Harbor, and we know the specific underwriting questions that come up for Bay-side vs Lake-side properties.

We work with both the National Flood Insurance Program and the major private flood carriers operating in Wisconsin. We do not push one over the other — the right answer depends on your property, your coverage needs, and whether you're prioritizing premium, limits, or grandfathered rates.

We are an American Family Insurance agency, but the flood specialty practice is independent of carrier preference. Our only goal is finding the right protection for your property and your budget.

Door County flood insurance — common questions

When did the new Door County flood maps take effect?
FEMA's new Flood Insurance Rate Maps for Door County, Wisconsin became effective on March 17, 2026. The Letter of Final Determination was issued by FEMA on September 17, 2025, which started the standard six-month adoption period. The county's incorporated and unincorporated areas are now regulated under the new maps for floodplain management and federal flood insurance purposes.
Why is Door County getting new flood maps?
Door County's flood maps were updated as part of FEMA's Great Lakes Coastal Flood Study, which is reassessing wave action, coastal erosion, and Lake Michigan / Green Bay water level risk for the entire Great Lakes shoreline. The previous maps for much of the peninsula predated modern coastal modeling. The 2026 update incorporates current lake-level data, updated wave runup analysis, and storm surge modeling specific to Wisconsin's lakeshore communities.
I got a letter from my mortgage company saying I need flood insurance. What do I do?
If your property is now mapped in Zone AE or Zone VE and you have a federally backed mortgage, your lender is required to enforce the flood insurance purchase requirement. You typically have 45 days from the lender's notice to obtain coverage before the lender places coverage on your behalf (which is almost always significantly more expensive than a policy you arrange yourself). The right move is to compare both NFIP and private flood insurance before that deadline. Call us at (920) 785-5019 and we'll handle the comparison.
How much does flood insurance cost in Door County?
Costs vary widely by zone, elevation, and structure characteristics under FEMA's Risk Rating 2.0 methodology. As a general planning range for residential property in Door County: Zone X typically runs $400 to $900 per year through NFIP. Zone AE typically runs $1,200 to $4,000 per year. Zone VE (coastal high-hazard, applicable to many lakeshore parcels) often runs $2,500 to $7,000+ per year. Private flood insurance can be 20–40% less expensive than NFIP for some properties, particularly higher-value homes in moderate zones — but it is not always cheaper. The only way to know is to run both quotes.
Does Door County require flood insurance even outside high-risk zones?
No federal law requires flood insurance outside Special Flood Hazard Areas (Zone A, AE, VE, etc.). However, Wisconsin DNR data and NFIP claim history both show that a significant share of flood losses come from properties outside high-risk zones — heavy rain events, ice jams on the Bay, and stormwater drainage failures all cause damage in lower-risk areas. Many Door County homeowners outside high-risk zones still purchase preferred risk policies, which are typically the most affordable NFIP tier.
What's the difference between Zone VE and Zone AE in Door County?
Zone AE is a high-risk area with a 1% annual chance of flooding from inland or coastal sources, with base flood elevations established. Zone VE is the same probability but with an additional hazard: wave action of 3 feet or more during a base flood event. VE zones are limited to coastal shoreline where storm waves can produce serious structural damage in addition to inundation. Many Door County properties along the open Lake Michigan side moved from Zone AE to Zone VE under the 2026 maps; some Green Bay-side properties remain Zone AE.
Can I appeal my new Zone designation?
The formal appeal window closed before the maps became effective on March 17, 2026. After effective date, your remedy is a Letter of Map Amendment (LOMA) or Letter of Map Revision based on Fill (LOMR-F). A LOMA can be requested if you have evidence your property's lowest adjacent grade is above the Base Flood Elevation — usually established through an Elevation Certificate prepared by a licensed surveyor. LOMA requests are free; the surveyor's elevation certificate typically runs $400–$800. We can help you understand whether a LOMA is worth pursuing for your specific situation.

Related Wisconsin flood insurance pages

External references: FEMA National Flood Hazard Layer · Wisconsin DNR Floodplain Mapping · FEMA Letters of Final Determination 2026

📞 Call (920) 785-5019