How to Appeal Your Property Tax in Delaware
Delaware homeowners can appeal their property tax assessment if they believe it's too high. This guide covers the 2026 appeal deadline, required evidence, and step-by-step process.
How Delaware Assesses Property
Delaware assesses residential property at 100% of market value.
Delaware nominally assesses at 100% of value, though base-year values are often decades old.
The Appeal Process
Appeals are heard by the Board of Assessment Review. An informal review is available before filing a formal appeal.
Board of Assessment Review
Superior Court
Delaware Appeal Deadline
What Overassessment Costs Delaware Homeowners
The median home in Delaware is worth $299,000. If your assessment is just 10% too high, you may be overpaying:
~$158/year
Effective tax rate: 0.53% · Median value: $299,000
Check Your Delaware Assessment
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Delaware Counties
Guides & Resources
Property Tax Appeal Resources
Best Appeal Services Compared
7 companies compared — pricing, coverage, and pros/cons for 2026.
2026 Appeal Deadlines
Every state's deadline, filing method, and what happens if you miss it.
Assessment Ratios by State
Every state's assessment percentage — from 4% to 100% — with worked examples.
9 Ways to Lower Your Property Taxes
From homestead exemptions to formal appeals — every method that works.
Savings Calculator
Check if you're overassessed — enter your assessed value to see potential savings.