PropertyTaxCalendar

New Castle County dates and official links

New Castle County property tax tools

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Tools for New Castle County, DE

Estimated bill

Starts at the county’s Census median: $352,200. Change it to your best estimate.

Estimated annual bill$2,499

Your home value × the county’s Census effective rate; your actual bill may differ.

Official tax information

Census survey, 2020–2024. Rate = median annual taxes ÷ median home value.

Census home value source
0500000US10003|352200|3776

Official source. Last verified 2026-10-24.

Census taxes paid source
0500000US10003|2499|38|2517|42|2446|76

Official source. Last verified 2026-10-24.

Late payment penalty

Not available yet

A complete date-based penalty rule and its matching cutoff have not been verified here.

Check the official information

Exemption savings

Check the exemptions that may fit. A “Yes” does not confirm eligibility; your assessor makes that decision.

Senior School Property Tax Relief

Homeowners 65+ using a primary residence; subject to the residency and timely-payment conditions described in the linked program.

Does this describe you?
Possible annual savingsAnswer above

We’ll show the next step for this exemption.

Official eligibility and application

Eligibility source
Homeowners age 65 or over are eligible for a tax credit against regular school property taxes of 50 percent (up to $500). This credit may only be used against property taxes on a primary residence.

Official source. Last verified 2026-10-24.

Disabled Veterans School Tax Credit

Qualifying veterans must receive 100% compensation for service-connected permanent and total disability via individual unemployability or a 100% VA rating, and have Delaware domicile for three years.

Does this describe you?
Possible annual savingsAnswer above

We’ll show the next step for this exemption.

Official eligibility and application

Eligibility source
Receive 100% disability compensation due to service-connected, permanent and total disability based on individual unemployability or a 100% disability rating from the U.S. Department of Veteran Affairs (USVDA) and Have held legal domicile in Delaware for the past 3 years.

Official source. Last verified 2026-10-24.

Estimates are separate. Do not add them together; eligibility, taxing units and restrictions can overlap.

Is my assessment too high?

Use market value, not assessed or taxable value.

Compared with the county medianAt the median

This compares market values only; being above the county median does not establish overassessment.

Official appeal information

Census survey, 2020–2024. Rate = median annual taxes ÷ median home value.

Census home value source
0500000US10003|352200|3776

Official source. Last verified 2026-10-24.

Census taxes paid source
0500000US10003|2499|38|2517|42|2446|76

Official source. Last verified 2026-10-24.

Appeal dates and filing

County appeal deadline: Not yet announced here. Confirm the deadline on your notice with the official office.

County filing instructions have not been verified here.

State guidance: Under 9 Del. C. 8312(c), an aggrieved party who properly appealed to the county assessing body may appeal its decision to Superior Court within 30 days by postmark after receiving notice.

Official appeal source. Last verified 2026-10-24.

Compare counties

Compare the same home value in up to four counties.

City or county works too.

    Starts at the county’s Census median: $352,200. Change it to your best estimate.

    Estimated annual differenceAdd a place

    Enter another ZIP, city or county to compare estimated annual bills.

    Not tax or legal advice; confirm with your county. How these estimates work.