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Delaware · Updated Oct 2026

Delaware property tax appeals by county

Each of Delaware's three counties values homes: the New Castle County Office of Finance (Assessment Division), the Kent County Department of Finance (Assessment Division) and the Sussex County Assessment Department. Appeals go to each county's Board of Assessment Review. There is no state assessor. Find your county for contact details, local tax figures and a step-by-step guide.

CountyOffice phoneTax rateMedian tax
Kent302-744-24010.43%$1,363
New Castle302-395-55200.72%$2,499
Sussex302-855-78240.31%$1,222