By the Lapera Insurance Team · Reviewed by Joe Lapera, Licensed Illinois Insurance Agent (IL Lic #100722394)
You searched for what flood insurance costs in Illinois and found five websites with five different averages. None of them priced your house. Here is how the cost of flood insurance in Illinois is actually set in 2026, why no statewide number fits your home, what can push your premium up or down, and how our team gets you a real figure instead of a guess.
The cost of flood insurance in Illinois has no honest statewide number: under Risk Rating 2.0, FEMA prices each NFIP policy on the building's own flood risk, and FEMA's 2025 fact sheet says 96% of policyholders saw changes of no more than $20 a month. Increases on most existing policies are capped at 18% a year. Your price turns on distance to water, flood types, elevation, foundation and rebuild cost, plus any community discount.
Maybe a lender just told you flood insurance is required and you are bracing for the number. Maybe a neighbor mentioned what they pay and you wonder whether it applies to you. Flood insurance is now priced house by house, so the most useful thing we can do is show you what goes into your number, which parts you can influence, and why deciding from anyone's average is the wrong way to decide.
How Much Does Flood Insurance Cost in Illinois in 2026?
TL;DR: There is no single honest statewide price, because FEMA sets each NFIP premium from the individual building's flood risk, so the only reliable number is a quote on your own address.
Anyone who hands you one tidy figure is giving you an average of other people's houses. Since FEMA moved the National Flood Insurance Program to its Risk Rating 2.0 pricing method, every policy is rated on the specific building: how far it sits from water, what kinds of flooding can reach it, how high its first floor is, what its foundation looks like and what it would cost to rebuild. Two houses on the same Illinois street can land in very different places.
What FEMA does publish is how the new system moved prices. In its Risk Rating 2.0 fact sheet (2025), FEMA reports that most policyholders, 96%, will see decreases or increases of no more than $20 per month, that policyholders with decreases move to the lower rate immediately at renewal, and that most annual increases are capped at 18%. That tells you the transition was modest for the large majority of policies. It does not tell you what your house costs.
FEMA publishes national figures on how Risk Rating 2.0 changed premiums, and it publishes state policy counts in its NFIP flood insurance data reports (latest edition as of August 31, 2026). What it cannot publish is a number that fits your house, because the premium is built from your building's own risk factors, your coverage amounts and your deductible. The Illinois averages you see on rate websites disagree because each one is built differently: different data pulls, different months, different mixes of new and renewing policies, often calculated from FEMA's raw policy files, which FEMA itself says are not an official federal report. None of them includes your elevation or your rebuild cost. The honest alternative is simple: send us the address and we will get you a real quote.
Here is the other side of the ledger. The Illinois Department of Insurance (accessed September 2026) notes that flooding is the most frequent and costly disaster in the country, with average flood insurance claim payments that can surpass $100,000. FEMA's own figure for the NFIP is an average payment of $82,614 for all claims between 2020 and 2024 (FEMA FloodSmart). Whatever your premium turns out to be, that is the number it is protecting you against.
Lapera Insurance Agency is a Farmers Insurance agency at 530 Barron Blvd in Grayslake, Illinois. Our team has helped Illinois families sort out water and flood coverage since 1993, with over 40 years of combined experience, and we would rather show you an honest quote on your own house than an average that fits nobody. We work with Farmers, the Farmers family of carriers and additional markets. Every guide on this site is reviewed by a licensed Illinois agent before it publishes.
How Does FEMA Price a Flood Policy Under Risk Rating 2.0?
TL;DR: FEMA rates each building on flood frequency, the types of flooding that can reach it, distance to a flooding source, first floor height and foundation, and the cost to rebuild, then applies your coverage, deductible and any community discount.
FEMA describes the variables in its Risk Rating 2.0 frequently asked questions as flood types, distance from a flooding source, frequency of flood, elevation and the cost to rebuild a property. The fact sheet adds that the method looks at multiple flood types, including river overflow and heavy rainfall, and at building characteristics such as first floor height. In plain terms, these are the things that move your number.
Distance to water
How far the building sits from a river, creek, lake or other flooding source. Closer generally means a higher price, and in Illinois that includes the small creek behind a subdivision, not just the big rivers.
Flood types
River overflow is one kind of flood. Heavy rainfall that pools and runs across flat ground is another, and it matters a great deal in Illinois, where clay soil drains slowly.
How often it floods
FEMA's models estimate how frequently water can reach the building. A place that floods every few decades prices differently than one that floods every few years.
Elevation and first floor height
How high the lowest floor sits above the ground and above expected flood levels. A few feet can change the price a lot.
Foundation type
A slab, a crawlspace, an elevated foundation and a full basement all rate differently. A below-grade basement puts value exactly where the water goes first.
Cost to rebuild
A larger or more expensive home costs more to repair after a flood, so replacement cost is built into the rate, not just the flood zone.
On top of the building's risk, three choices you make change the premium: how much building coverage you buy, up to $250,000 on a home under the NFIP; whether and how much contents coverage you add, up to $100,000; and your deductible (FEMA FloodSmart policy terms, accessed September 2026). Then any Community Rating System discount your town has earned comes off the top. We cover that below.
Rebuild cost drives your homeowners premium too; see what Illinois homeowners insurance costs and why.
How Is Risk Rating 2.0 Different From the Old Flood Zone Pricing?
TL;DR: The old method leaned mainly on the flood zone printed on the map and, in high-risk zones, the elevation, while Risk Rating 2.0 prices the individual building, so the zone decides whether coverage is required, not what it costs.
Under the older approach, the letter on the flood map did most of the work: outside the high-risk zone you usually paid a low, fairly standard rate, and inside it your elevation drove the price. A house next to a creek and a house on a hill could pay about the same if they shared a zone.
| What sets the price | Old zone-based method | Risk Rating 2.0 |
|---|---|---|
| Flood zone on the map | Primary driver | Still decides if a lender requires it, no longer sets the price |
| Distance to a flooding source | Not directly rated | Rated |
| Heavy rainfall flooding | Not directly rated | Rated as one of several flood types |
| Cost to rebuild the home | Not directly rated | Rated |
| First floor height and foundation | Mainly in high-risk zones, with an Elevation Certificate | Rated for every building |
| Elevation Certificate | Often required to rate | Optional, and can still help |
The practical result: being outside the mapped high-risk zone no longer guarantees a rock-bottom price, and being inside it no longer guarantees a painful one. That is also why a neighbor's premium tells you very little about yours.
How Much Can Your NFIP Flood Premium Go Up Each Year?
TL;DR: For most existing NFIP policies, Congress limits annual premium increases to 18%, and increases continue each year only until the policy reaches its full-risk rate, while decreases apply at the first renewal.
This is the part that surprises people at renewal. FEMA's Risk Rating 2.0 FAQ states that premium increases for existing policies will be gradual and within the annual cap imposed by Congress, which for most policyholders will be 18%. Its fact sheet adds that premiums will only increase until the full-risk rate is reached.
So if your house's full-risk rate is well above what you pay today, your premium can climb every year for several years, one capped step at a time. That is the glide path working as designed, not a billing error. FEMA's single-family home analysis, using policies in force as of August 31, 2023, found that 38% of single-family policyholders were already paying a risk-based premium, while others were paying lower premiums by law.
- Decreases are immediate. If your full-risk rate is lower than what you were paying, FEMA says you move to the lower rate at renewal.
- Increases are stepped. For most existing policies, each year's increase is limited to 18% until the full-risk rate is reached.
- The cap is for existing policies. FEMA frames the gradual increase around policies already in force. A brand-new policy is rated under the current method from the start, which is one reason a buyer's quote can look different from the seller's premium.
- Think twice before you let it lapse. Dropping a policy and buying again later means starting over as a new policy, with a new 30-day wait. Talk to us before you cancel.
Ask the seller for the current flood declarations page before you close. Ask whether the existing policy can be transferred to you, and we can compare that with a new policy on the same house.
What Changed for Illinois Flood Insurance Costs in 2026?
TL;DR: Risk Rating 2.0 is still stepping below-risk policies toward their full rate, several Illinois communities have Community Rating System classes taking effect October 1, 2026, and some northern Illinois flood maps changed in January 2026.
We are not aware of a new Illinois law or NFIP rating change affecting your price this year. What did move is worth knowing about.
- The glide path continues. Policies still below their full-risk rate keep stepping up at renewal, within the annual cap, until they get there. If your renewal went up again, this is the most likely reason.
- New community ratings. According to FEMA's NFIP Community Status Book data (refreshed August 25, 2026), Glenview, Winnetka and Wheeling (class 5), Glen Ellyn and Lake in the Hills (class 6) and Riverwoods (class 7) have Community Rating System classes effective October 1, 2026, and Lincolnshire's class 8 took effect April 1, 2026.
- Updated flood maps in some communities. The same FEMA list shows a current effective map date of January 23, 2026 for unincorporated Cook and Kane counties and a group of northwest suburbs, including Barrington, Elgin, Hoffman Estates and Schaumburg. A new map can change whether a lender requires flood insurance.
- Fresh FEMA data. FEMA's NFIP policy and claims reports were updated with data as of August 31, 2026.
Does Your Illinois Community Earn a Flood Insurance Discount?
TL;DR: Possibly: the state counts 71 Illinois communities in FEMA's Community Rating System, and NFIP policyholders in a participating community get an automatic discount that, under Risk Rating 2.0, applies inside and outside the high-risk zone.
The Community Rating System is a FEMA program that rewards towns and counties for flood protection work beyond the minimum, such as stronger floodplain rules, open space and drainage maintenance. The community earns a class from 9 down to 1, and you don't apply for the discount; it comes with the address. FEMA's Community Rating System Discount Guide (July 2023) sets it at 5% for class 9, rising 5 points per class to 45% for class 1, and says that under Risk Rating 2.0 the discount applies to all NFIP policies in the Regular Program in a participating community, including policies outside the Special Flood Hazard Area. FEMA's agent guidance describes the same range, up to 45% (FEMA, Reducing Insurance Costs, accessed September 2026).
In Illinois, the Illinois Department of Natural Resources (accessed September 2026) reports that 71 communities participate in the Community Rating System, out of 82 counties and 770 communities that participate in the NFIP. IDNR also reports that more than 250,000 buildings sit in Illinois floodplains. As an example from our home county, here is what FEMA's community list shows for a sample of Lake County communities.
| Lake County community (example) | CRS class | NFIP premium discount under Risk Rating 2.0 |
|---|---|---|
| Gurnee | Class 5 | 25% |
| Unincorporated Lake County | Class 6 | 20% |
| Libertyville | Class 6 | 20% |
| Deerfield (Cook/Lake) | Class 6 | 20% |
| Lake Forest | Class 7 | 15% |
| Buffalo Grove (Lake/Cook) | Class 7 | 15% |
| Riverwoods | Class 7, effective October 1, 2026 | 15% |
| Lincolnshire | Class 8 | 10% |
| Grayslake, Mundelein, Vernon Hills, Waukegan, Round Lake Beach | Not in CRS | None |
Classes: FEMA, NFIP Community Status Book, data refreshed August 25, 2026. Discounts: FEMA's CRS Discount Guide, which applies the class discount to every NFIP policy in the community, in or out of the high-risk zone. (The status book still prints separate in-zone and out-of-zone figures from FEMA's pre-2021 rating rules.) Ratings change as communities are re-verified, join or leave, so check FEMA's current list or ask us before relying on a discount. Several larger villages, including our own Grayslake, do not participate. Elsewhere in Illinois, we can look up your town's class.
Is Flood Insurance Worth the Cost if You Are Outside a High-Risk Zone?
TL;DR: Often yes: FEMA reports that 29% of NFIP claims from 2014 to 2024 came from outside current high-risk flood areas, and a building farther from water and higher above it tends to rate lower under Risk Rating 2.0.
FEMA puts it plainly on FloodSmart: nearly one-third of NFIP flood insurance claims (29%) came from areas located outside of current high-risk flood areas, based on claims from 2014 to 2024. Our full rundown of NFIP coverage, private flood and the basement gaps goes deeper on why the map misses so much Illinois flooding.
Now look at how few homes are covered. FEMA's NFIP residential penetration data (as of August 3, 2026) shows that in Lake County, 1,857 residential NFIP contracts were in force across roughly 226,128 residential structures, about 0.8%. Even inside the mapped high-risk areas, only about 24% of residential structures (1,114 of 4,579) carried an NFIP policy. Those figures don't count private flood policies, but they make the point: most homes are going without.
Why does that matter for cost? A house outside the high-risk zone, at a decent elevation and some distance from water, often rates at the lower end. People skip the coverage assuming it is expensive without ever getting the number.
A northern Illinois family lives outside the mapped high-risk zone with no flood policy. A slow July storm sends the creek behind the subdivision over its bank, and water flows into the walkout basement and several inches onto the main floor. Illustrative damage: $38,000 to the main floor, $9,000 to basement mechanicals and $14,000 in belongings. The homeowners policy excludes flood, so without flood coverage the family pays all of it. With NFIP building and contents coverage, the main floor, the mechanicals and main-floor belongings would generally be eligible, less deductibles, while finished basement walls, flooring and basement contents are largely excluded. These figures are illustrative, not a quote, a premium or a coverage determination; actual results depend on the policy language and the facts of the loss.
One more distinction, because it decides a lot of Illinois basement claims: water that comes up through a floor drain or a failed sump pump is usually not flood at all. It is backup, which is excluded from the base homeowners policy and added back by endorsement. Our in-depth look at whether Illinois home insurance covers sewer backup and sump pump failure explains that side of the bill. Many Illinois homes need both.
Is Private Flood Insurance Cheaper Than the NFIP in Illinois?
TL;DR: Sometimes, and sometimes not, because private flood carriers price by their own models and appetite, so the only way to know is to compare a private quote against the NFIP quote on the same building and coverage.
A private flood market exists alongside the NFIP, and for some Illinois homes it is worth a look. The Illinois Department of Insurance (accessed September 2026) notes that private flood insurance can fill gaps and may offer higher coverage limits than the NFIP, and cautions that private policies do not come with guaranteed renewal. Both points matter when you compare price.
- Where private can win: homes that cost more than $250,000 to rebuild, owners who want broader contents or living-expense coverage, and some lower-risk buildings where a private carrier's model comes in under the NFIP price.
- Where the NFIP can win: higher-risk buildings a private carrier may decline or price steeply.
- Compare like for like. Same building limit, same contents limit, similar deductibles. A lower private price that drops contents or cuts the limit is not a better deal.
- Check the lender. If a mortgage requires flood insurance, confirm the lender will accept the private policy before you switch.
- Think about next year. A private policy can be re-underwritten or non-renewed.
When a private option is available for your house through the markets we work with, we will show it next to the NFIP quote so you can compare coverage as well as price.
What Can You Do to Lower the Cost of Flood Insurance in Illinois?
TL;DR: Choose a deductible you can truly afford, get an Elevation Certificate if it helps, raise utilities above likely flood levels, keep the policy continuously in force, and buy at least 30 days before you need it.
FEMA's own list of ways to reduce NFIP premiums (Reducing Insurance Costs, accessed September 2026) is practical, and none of it involves cutting coverage you need.
- Pick the right deductible. FEMA notes that a higher deductible lowers the premium, up to a $10,000 maximum. Only choose one you could pay tomorrow, because a flood is exactly when cash is tight.
- Get an Elevation Certificate. It is optional under Risk Rating 2.0, but if your first floor sits well above the ground, documenting it can help the rating.
- Move the equipment up. FEMA notes that elevating the furnace, water heater, air conditioning and electrical panel above flood level may offer flood insurance savings, and it keeps the most expensive basement items out of the water.
- Keep the policy in force. The 18% cap is built around existing policies, so a continuous policy is usually worth protecting. Ask us before you cancel.
- Buy early. NFIP coverage normally takes effect 30 days after purchase, with limited exceptions such as buying in connection with a mortgage closing (FEMA FloodSmart). February is a better time to start than the week the river rises.
Dropping contents coverage to hit a number, or buying a building limit below what the house needs. Under-insuring is how a small premium becomes a large uninsured loss.
Renters can buy NFIP contents-only coverage up to $100,000; see our guide to renters coverage in Illinois. Condo owners depend partly on the association's policy; our Illinois HO-6 and condo coverage guide explains the split. For the homeowners side, see our roundup of Illinois home insurance discounts.
Want a real number? Start on our Illinois home insurance page, check the flood map for your address at FEMA Map Service Center, or request a flood and home coverage quote and our Grayslake team will price your actual building.
The Bottom Line
Flood insurance in Illinois doesn't have a statewide price anymore. It has your price, built from how far your house sits from water, the kinds of flooding that can reach it, its elevation and foundation, what it costs to rebuild, the coverage you choose and whether your community earns a discount. FEMA says 96% of policyholders saw changes of no more than $20 a month under Risk Rating 2.0, and most existing policies can rise no more than 18% a year until they reach their full-risk rate.
The averages online are other people's houses. Send us your address, or call or text (847) 223-4747, Monday through Friday, 8:30 AM to 5:00 PM Central, and we will get you an actual NFIP quote, show you a private option when one fits, and tell you honestly whether we think the coverage is worth it for your home.
Related Questions
Why do websites show different average flood insurance costs for Illinois?
Because each one builds its average differently. Some use a single month of new and renewing policies, some use older data, and many calculate from FEMA's raw policy files, which FEMA says are not an official federal report. Under Risk Rating 2.0 every building is priced on its own risk, so no statewide average reflects your elevation, foundation, distance to water or rebuild cost.
How much can my NFIP flood insurance premium go up each year?
For most existing policies, FEMA says annual increases stay within a cap set by Congress, which for most policyholders is 18%. Increases continue each year only until the policy reaches its full-risk rate. If your full-risk rate is lower than what you pay, the decrease applies at your next renewal instead.
Is flood insurance cheaper outside a high-risk flood zone in Illinois?
Often, because a building outside the high-risk zone, at a reasonable elevation and some distance from water, tends to rate lower under Risk Rating 2.0. The zone no longer sets the price by itself, though. FEMA reports that 29% of NFIP claims from 2014 to 2024 came from outside current high-risk areas, so a quote is worth getting.
How does the Community Rating System lower flood insurance costs in Illinois?
Communities that do extra flood protection work earn a CRS class from 9 to 1, and NFIP policyholders there get an automatic discount. Under Risk Rating 2.0, FEMA applies that discount to every NFIP policy in the community, inside or outside the high-risk zone, from 5% at class 9 up to 45% at class 1. Gurnee, a class 5 community on FEMA's August 25, 2026 list, earns 25%. IDNR reports 71 participating Illinois communities.
Does a higher deductible lower the cost of flood insurance?
Yes. FEMA notes that choosing a higher deductible lowers the NFIP premium, up to a $10,000 maximum deductible. Pick one you could pay out of savings right away, because flood losses tend to arrive with other expenses, and remember that building and contents coverage can carry separate deductibles.
Can taking over the seller's flood policy lower my cost when I buy an Illinois home?
Sometimes. FEMA's Risk Rating 2.0 FAQ says a policyholder can transfer their discount to a new owner by assigning the flood policy when the property changes ownership. If the seller's premium is still below its full-risk rate, that can be a lower starting point than a brand-new policy. Ask for the declarations page before closing and we will compare both.
Last reviewed September 2026 by Joe Lapera, Licensed Illinois Insurance Agent (IL Lic #100722394). Figures verified against the sources linked above on that date.