TaxDrop
Start My Protest

New Castle County, Delaware Property Taxes (2026)

New Castle County homeowners pay a median property tax of $2,444/year on a median home value of $329,800 — an effective rate of 0.74%, which is below the national median of 1.02%. New Castle County has a population of approximately 573,030.

Appeal Your New Castle County Property Taxes with TaxDropCheck Your Tax Rate — Free Calculator

Effective Tax Rate

0.74%

Higher than the Delaware median of 0.46%

Median Home Value

$329,800

Annual Tax Bill

$2,444

~$204/month

Est. Annual Savings

$367

If reduced by 15%

Free Tax Check

New Castle County, Delaware Property Tax Calculator

Enter your address to instantly see if you're overpaying on property taxes. Our tool compares your assessed value against recent comparable sales in New Castle County to estimate your potential savings.

  • Takes less than 2 minutes
  • Uses real New Castle County comparable sales data
  • 100% free — no credit card required
Check Your Property Tax Rate →

Average Annual Savings

$367

Estimated savings for New Castle County homeowners

Property Tax Rates: New Castle County vs. Delaware vs. National

New Castle County0.74%
Delaware Median0.46%
National Median1.02%

Key stat: The effective property tax rate in New Castle County, Delaware is 0.74%, compared to the Delaware median of 0.46% and the national median of 1.02%. (Source: U.S. Census Bureau, ACS 5-Year Estimates)

How New Castle County Compares Across Delaware

See where New Castle County's tax metrics fall relative to all 3 Delaware counties.

Tax Rate Distribution

Percentile distribution across all Delaware counties

10th

0.00%

25th

0.00%

Median

0.46%

75th

1.00%

90th

1.00%

Home Value Distribution

Percentile distribution across all Delaware counties

10th

$298,440

25th

$310,200

Median

$329,800

75th

$341,550

90th

$348,600

Tax Bill Distribution

Percentile distribution across all Delaware counties

10th

$1,203

25th

$1,251

Median

$1,331

75th

$1,888

90th

$2,221

New Castle County County Assessment Office Information

New Castle County County Assessment Office

Assessing Authority

New Castle County Assessment Office

Appeal Deadline

Varies by county

Delaware appeal filing deadline

State

Delaware

How to appeal

Let TaxDrop handle it for you →

How to Appeal Your Property Taxes in New Castle County

If you own property in New Castle County, you have the legal right to appeal your assessed value. Here is the step-by-step process:

1

Review your assessment notice

Check the assessed value from the New Castle County Assessment Office. Compare it to recent sales of similar homes in your area.

2

File your appeal before the deadline

The Delaware deadline is Varies by county. Missing this deadline means waiting until the next assessment year.

3

Gather supporting evidence

Compile recent comparable sales, photos of property condition issues, independent appraisals, or any factors that reduce your home's value.

4

Present your case

Attend a hearing or submit your evidence to the County Assessment Office. Present clear data showing your assessed value is too high.

5

Receive your decision

If successful, your assessed value and tax bill will be reduced. With a median bill of $2,444, even a 10-15% reduction means $244-$367 in annual savings.

Skip the hassle — let TaxDrop handle it

TaxDrop's licensed consultants analyze your property, build your case with comparable sales data, and represent you through the entire appeal process. You pay nothing unless we save you $500 or more.

Start Your New Castle County Appeal →Free Tax Rate Calculator

Property Tax Exemptions in Delaware

Delaware homeowners may qualify for exemptions that reduce their taxable value. Common exemptions include:

Homestead Exemption

Available to primary residence owners. Reduces the assessed value used to calculate your tax bill.

Senior/Over-65 Exemption

Additional exemption for homeowners age 65+. May include a tax ceiling that freezes your bill.

Disability Exemption

For homeowners with qualifying disabilities. Similar benefits to the over-65 exemption.

Veteran Exemption

Disabled veterans may receive partial or full exemptions depending on disability rating.

Frequently Asked Questions

What is the property tax rate in New Castle County, Delaware?
The median effective property tax rate in New Castle County, Delaware is 0.74%. On a home valued at $329,800, the median annual property tax bill is $2,444. Source: U.S. Census Bureau, ACS 2026.
How much are property taxes in New Castle County?
The median annual property tax bill in New Castle County is $2,444, which works out to approximately $204/month. This is based on the median home value of $329,800 and an effective tax rate of 0.74%.
How do I appeal my property taxes in New Castle County?
To appeal your property taxes in New Castle County, Delaware, you need to file with the New Castle County Assessment Office before the deadline of Varies by county. You'll need evidence that your assessed value exceeds your property's market value, such as recent comparable sales. TaxDrop can handle this entire process for you — you pay nothing unless we save you $500 or more.
Is New Castle County a high property tax area?
New Castle County's effective tax rate of 0.74% is below the national median of 1.02%. It's also above the Delaware median of 0.46%, making it one of the higher-taxed counties in the state.
What is the deadline to appeal property taxes in Delaware?
The deadline to appeal property taxes in Delaware is Varies by county. It's important to file before this deadline — missing it means waiting until the next assessment cycle. TaxDrop monitors deadlines and files on your behalf to ensure you never miss the window.
Can TaxDrop help lower my New Castle County property taxes?
Yes. TaxDrop helps homeowners in New Castle County, Delaware appeal their property tax assessments. We analyze your property, compare it against local comparable sales, and handle the entire appeal process. Our fee is 25% of your savings — and if we don't save you at least $500, you pay nothing.

Nearby Counties

Kent County

Rate: 0.46%

Tax bill: $1,331

Sussex County

Rate: 0.33%

Tax bill: $1,171

← View all 3 Delaware counties

Stop overpaying on property taxes

30-60% of properties are over-assessed, but only 5% of homeowners challenge their bill. TaxDrop makes it easy to fight back. No upfront cost. No fee if we save you less than $500.

Check Your Savings