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Delaware has an effective property tax rate of 0.57%, producing an average annual bill of $1,570. The US national average is 1.07% — Delaware's rate is below, placing it at rank #10 out of 50 states (rank 1 = lowest).
Delaware is unique in that property assessments have not been updated in some counties for over 40 years — Sussex County's last reassessment was in 1974. Assessed values can be 20-30% of current market value. State law is evolving to require more regular reassessment.
The State Property Tax Credit reduces the property tax bill by up to $500 for residents age 65+ who have lived in Delaware for at least 10 years. New Castle County offers additional exemptions.
The outdated assessments function as a de facto cap — new construction is typically assessed at full value while older properties may carry very low assessments.
Delaware's property tax is one of the lowest in the Northeast, contributing to its appeal as a retirement destination. The state also has no sales tax and relatively low income taxes.
The median home value in Delaware is $340,000. Delaware home prices have risen sharply since 2020, particularly in Sussex County near the beaches, up 35%+. Wilmington and New Castle County are more moderately priced. At the 0.57% effective rate, a homeowner at the median value pays roughly $1,570/year in property taxes.
Data: Tax Foundation (2024), US Census Bureau ACS 2023, Zillow, ATTOM Data Solutions. Updated 2024–2025. Figures reflect state averages — consult a licensed professional for personalized advice.
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