New Castle County, DE property tax rate
New Castle County · Delaware · #1 of 3 in the state
Median annual property tax $2,499 · median home value $352,200
$2,499 a year · $208 a month using the area benchmark. Enter a value such as 350,000 or 350,000.00.
A rough planning estimate, not a tax quote.
Below the U.S. benchmark 0.94% (0.76×), above the Delaware benchmark 0.50%.
Ranked among 3 Delaware counties with available benchmarks.
What this benchmark means
Median real estate taxes paid ÷ median owner-occupied home value, ACS 2020–2024 — a ratio of two medians, not a statutory rate, not the median of individual bills and not your property's rate. Exemptions people already claim are reflected in the survey; your bill depends on taxable value, local districts, exemptions and reassessment after a sale.
Census figures behind this page
| Median real estate taxes paid | $2,499 |
|---|---|
| With a mortgage / without | $2,517 / $2,446 |
| Median home value | $352,200 |
| Median household income | $91,166 · tax is 2.7% of it |
| Median gross rent | $1,448 / mo |
| Owner-occupied | 69% of 224,173 homes |
| Population | 577,961 |
When it's due in Delaware
All statesPayment dates vary by local tax authority.
Check your city, town or county tax collector for this year's deadline. The statewide notes below are a general guide.
| Late penalty | New Castle: 6% penalty on Oct 1 + 1%/month; Kent & Sussex: 1.5% per month (9 Del. C. § 8604) |
|---|---|
| Appeal window | New Castle County: by March 15; Kent County: by April 15; Sussex County: by February 15 (9 Del. C. § 8311) |
county-set; Delaware has 3 counties, all with annual payment due September 30 (delinquent October 1). New Castle adds 6% penalty on Oct 1 plus 1%/month; Kent/Sussex add 1.5%/month. Regular annual schedule; tax year: tax year July 1 - June 30, bills mailed July. Source: 9 Del. C. § 8604, rules checked 2026-09-19. Confirm the amount and deadline on your official tax bill.
Delaware counties with a similar rate
All 3How this benchmark was computed
Median real estate taxes paid by owner-occupied households in New Castle County ($2,499) divided by the median value of those homes ($352,200), both from the Census Bureau's American Community Survey 2020–2024 5-year estimates. It is a ratio of two medians — a reasonable area benchmark, not the assessor's mill rate and not any one household's rate. Newly purchased homes are often reassessed to sale price, so a buyer's first bill can run above it. Data & method