Appealing Your Property Tax Assessment in Delaware
Deadlines and steps to appeal a property tax assessment in Delaware, and when property taxes are due.
Short answer: Assessment appeals go to the county board of assessment review. In New Castle County, written notice of appeal must be filed with the Board before March 15; Kent and Sussex boards hear appeals from March 1 to May 31 each year. 9 Del. C. §§ 8311, 8312, 8343
| Appealing your assessment | Assessment appeals go to the county board of assessment review. In New Castle County, written notice of appeal must be filed with the Board before March 15; Kent and Sussex boards hear appeals from March 1 to May 31 each year. The board must notify the appellant of its decision in writing within 30 days, and the owner may appeal to the Superior Court within 30 days (by postmark) after receiving notice of the decision. Supplemental assessments may be appealed within 30 days after the notice is sent. Re-verified 2026-10-27. Source: 9 Del. C. §§ 8311, 8312, 8343 |
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More Delaware property tax & homestead exemptions
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FAQ
How do you appeal a property tax assessment in Delaware?
Last verified against official sources: October 27, 2026.
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General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.