New Castle, New Castle County, Delaware Property Taxes
Property Taxes in New Castle, Delaware
Median New Castle, Delaware effective property tax rate: 0.67%, significantly lower than the national median of 1.02%, and lower than the Delaware state median of null%.
Median New Castle, Delaware home value: $231,480
Median annual New Castle, Delaware tax bill: $1,552, $848 lower than the national median property tax bill of $2,400.
How are property taxes in New Castle calculated?
Property taxes in New Castle, Delaware 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 New Castle's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in New Castle, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
New Castle, New Castle County, Delaware Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.67%
Estimate Property Tax Bill
$1,551
$1,439
How Does the New Castle Property Tax Calculator Work?
Use this New Castle property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies New Castle's median effective tax rate of 0.67% — based on actual property records in New Castle County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment office uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies New Castle'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 New Castle: rates range from 1.55% in 19720 to 1.55% in 19720, 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 New Castle.
About New Castle Property Taxes
About Property Taxes in New Castle, Delaware
New Castle’s median effective property tax rate of 0.67% is lower than the national median of 1.02%. This rate reflects the New Castle County base levy combined with local school district levies and special assessment districts that vary by subdivision throughout the city.
Property tax rates are not uniform across New Castle. Homeowners in the 19720 ZIP code carry a median effective rate of 0.67%, and those in the same ZIP code also see the same median tax bill of $1,552. Understanding where you live in New Castle can still make a meaningful difference to your annual tax bill.
New Castle homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the March 14, 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 New Castle, New Castle County, Delaware
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 New Castle's effective property tax rate to other cities in Delaware and the median property tax rates in Delaware 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 New Castle Tax Rate
0.67%
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 New Castle County Tax Rate
0.80%
Median Effective Delaware Tax Rate
1.33%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across New Castle, New Castle County, Delaware
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 19720 | 0.31% | 0.54% | 0.67% | 0.79% | 0.96% |
Source: Ownwell
Property Tax Assessment Values Across New Castle, New Castle County, Delaware
When examining property taxes in New Castle, Delaware, 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 New Castle County appraisal district 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 New Castle County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month when notices are sent.
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 New Castle.
For example, the median home price in New Castle is $231,480, with tax bills ranging significantly across the county. 19720 has the highest median home price at $231,480.
Property Tax Assessment Values Across New Castle, New Castle County, Delaware
Source: Ownwell
$99,090
$472,410
$845,730
Median New Castle Market Value
$231,480
Median New Castle County Market Value
$290,430
Median Delaware Market Value
$66,000
Median United States Market Value
$235,294
Property Tax Assessment Values Across New Castle, New Castle County, Delaware
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 19720 | $128,250 | $184,680 | $231,480 | $302,400 | $366,480 |
Source: Ownwell
Property Tax Bills Across New Castle, New Castle County, Delaware
Property tax bills in New Castle are based on the assessed value of a home, not its market price. Local taxing authorities use that assessment to calculate what a homeowner owes each year, and the final bill depends on the tax rate set for the area.
For a home with a median value of $231,480, the typical property tax bill is $1,552. That is below the national median property tax bill of $2,400 and also below the national median property tax rate of 1.02%.
Several factors can affect the amount due, including the home’s assessed value, local tax rates, and whether the property qualifies for any exemptions. Homeowners with higher-value properties or assessments that rise faster than expected may see larger bills, while lower assessments can help keep taxes more manageable.
In New Castle, property taxes can have a noticeable impact on monthly housing costs, so understanding how the bill is calculated is important for budgeting and long-term affordability.
Median New Castle Tax Bill
$1,552
Median New Castle County Tax Bill
$2,329
Median Delaware Tax Bill
$1,454
Median United States Tax Bill
$2,400
Property Tax Bills Across New Castle, New Castle County, Delaware
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 19720 | $601 | $1,128 | $1,552 | $2,079 | $2,717 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | March 14 |
Links | |
|---|---|
| New Castle Tax Assessor | |
| Website | www3.newcastlede.gov |