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.
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| County | Office phone | Tax rate | Median tax |
|---|---|---|---|
| Kent | 302-744-2401 | 0.43% | $1,363 |
| New Castle | 302-395-5520 | 0.72% | $2,499 |
| Sussex | 302-855-7824 | 0.31% | $1,222 |