New Castle County Property Tax Calculator
Locality estimate page for New Castle County, Delaware. Use this county/locality rate for faster screening, then confirm parcel-specific details with your local tax authority.
County/Locality Effective Rate
0.71%
State Effective Rate
0.54%
Sample Annual Tax Difference
$723
Median Home Value (ACS)
$352,200
Median Annual Tax Bill (ACS)
$2,499
Owner-Occupied Households
154,724
The typical owner-occupied home in New Castle County is valued at $352,200 with a median real estate tax bill of $2,499 per year — an effective rate of 0.71%. Both figures come from the same ACS release, so the ratio is an estimate rather than an aggregate of individual bills.
State Mortgage Context: Delaware
Most counties in this state follow the standard FHA floor framework.
State Effective Tax Rate
0.54%
FHA 1-Unit Floor
$541,287
FHA 1-Unit Ceiling
$1,249,125
In New Castle County, Delaware, the current county-level estimate is 0.71%, or approximately $2,840 annually on a $400,000 home.
How to Use This County Estimate
Step 1
Enter your property value and assessment assumptions.
Step 2
Apply exemptions that may reduce taxable value.
Step 3
Compare county/locality estimate against statewide fallback.
New Castle County Property Tax Snapshot
Estimated effective rate: 0.71% · vs Delaware: 0.54% · vs national benchmark: 0.90%
| Home value | Estimated annual tax | Estimated monthly tax |
|---|---|---|
| $250,000 | $1,775 | $148 |
| $400,000 | $2,840 | $237 |
| $500,000 | $3,550 | $296 |
| $750,000 | $5,325 | $444 |
| $1,000,000 | $7,100 | $592 |
Compare Nearby Property Taxes
- New Castle County0.71%
- Kent County0.43%
- Sussex County0.32%
Source Transparency
Source: U.S. Census Bureau, ACS 5-Year Estimates (B25103 / B25077)
View sourceLast updated: August 2026
Estimates only. Confirm parcel-specific amounts with the official local taxing authority.
Need Statewide Context?
Visit Delaware mortgage snapshot or return to the national calculator hub.