Grayslake, Lake County, Illinois Property Taxes
Property Taxes in Grayslake, Illinois
Median Grayslake, Illinois effective property tax rate: 3.09%, significantly higher than the national median of 1.02%, and higher than the Illinois state median of 2.33%.
Median Grayslake, Illinois home value: $291,119
Median annual Grayslake, Illinois tax bill: $8,524, $6,124 higher than the national median property tax bill of $2,400.
How are property taxes in Lake calculated?
Property taxes in Grayslake, Illinois are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Grayslake's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Grayslake, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Grayslake, Lake County, Illinois Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
3.09%
Estimate Property Tax Bill
$8,996
$8,348
How Does the Grayslake Property Tax Calculator Work?
Use this Grayslake property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Grayslake's median effective tax rate of 3.09% — based on actual property records in Lake County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Grayslake's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Grayslake: rates range from 3.09% in 60030 to 3.09% in 60030, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Grayslake.
About Grayslake Property Taxes
About Property Taxes in Grayslake, Lake, Illinois
Grayslake’s median effective property tax rate of 3.09% is higher than the Illinois state median of 2.33% and higher than the national median of 1.02%. This rate reflects the Lake County base levy combined with local school district levies and special service areas that vary by subdivision throughout the city.
Property tax rates are not uniform across Grayslake. Homeowners in the 60030 ZIP code carry a median effective rate of 3.09%, while those in the lowest ZIP code also pay 3.09%. This reflects how school district boundaries and local assessment districts are drawn across Lake County.
Grayslake homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the June 1, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Grayslake, Lake County, Illinois
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Grayslake's effective property tax rate to other cities in Illinois and the median property tax rates in Illinois and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Grayslake Tax Rate
3.09%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Lake County Tax Rate
2.61%
Median Effective Illinois Tax Rate
2.33%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Grayslake, Lake County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60030 | 2.39% | 2.69% | 3.09% | 3.24% | 3.48% |
Source: Ownwell
Property Tax Assessment Values Across Grayslake, Lake County, Illinois
When examining property taxes in Grayslake, Illinois, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Lake County assessment office estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Lake County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Grayslake.
For example, the median home price in Grayslake is $291,119, with tax bills ranging significantly across the county. 60030 has the highest median home price at $291,119.
Property Tax Assessment Values Across Grayslake, Lake County, Illinois
Source: Ownwell
$153,792
$627,201
$1,100,609
Median Grayslake Market Value
$291,119
Median Lake County Market Value
$317,980
Median Illinois Market Value
$227,888
Median United States Market Value
$235,294
Property Tax Assessment Values Across Grayslake, Lake County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60030 | $181,113 | $220,658 | $291,119 | $366,056 | $422,952 |
Source: Ownwell
Property Tax Bills Across Grayslake, Lake County, Illinois
Property tax bills in Grayslake are based on the assessed value of a home, not its market price alone. Local taxing authorities set tax rates, and the bill is calculated by applying those rates to the assessed value after any exemptions are considered. For homeowners, this means a higher assessment can lead to a larger bill even if the home was not recently sold.
The typical home value in Grayslake is $291,119, and the median property tax bill is $8,524 in ZIP code 60030. That is well above the national median property tax bill of $2,400, showing how much local taxes can vary from the national norm. Bills can also differ across homes in the same city depending on assessment levels and local rates. For many homeowners, property taxes are one of the largest ongoing housing costs, so understanding how the bill is determined is important for budgeting and planning.
Median Grayslake Tax Bill
$8,524
Median Lake County Tax Bill
$8,402
Median Illinois Tax Bill
$5,277
Median United States Tax Bill
$2,400
Property Tax Bills Across Grayslake, Lake County, Illinois
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 60030 | $4,608 | $6,380 | $8,524 | $11,083 | $13,036 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
Links | |
|---|---|
| Lake Tax Assessor | |
| Website | tax.lakecountyil.gov |