Delaware Property Tax Appeal:
How to Fight Your Over-Assessment
In Delaware, 40% of appeals succeed with an average savings of $750/year. Yet fewer than 5% of homeowners ever file. Here’s how to do it — and how Tax Ghost generates your formal appeal letter for $24.99.
Delaware Property Tax Appeal — Key Facts
How to Appeal in Delaware
Check your assessment notice
Your county assessor mails assessment notices — usually in spring. The notice shows your assessed value and the appeal deadline. In most states you have 30–90 days from the notice date.
Gather comparable sales
Find 3–5 similar properties in your neighborhood that sold recently at prices below your assessed value. Use Zillow, Redfin, or your county recorder's public records. The more recent and similar the sales, the stronger your case.
File your formal appeal
In Delaware, you file with the Board of Assessment Review. File written appeal with the County Board of Assessment Review. Bring comparable sales within your county. File before 30 days after assessment notice.
Present your evidence at the hearing
Show up with your comparables. Be calm and factual. You don't need a lawyer. Appeals boards are accustomed to homeowners representing themselves. Simply demonstrating that comparable properties sold for less than your assessment is often enough to win a reduction.
Expert tip for Delaware
Delaware has three counties with separate assessment offices. New Castle County reassesses most frequently.
Get your Delaware appeal letter — $24.99
Formal appeal letter citing Del. Code tit. 9, § 8312, addressed to the Board of Assessment Review. Evidence checklist and filing instructions included. PDF delivered in 60 seconds.
Free scan → pay only if you want the letter
Frequently Asked Questions
How do I appeal my property tax assessment in Delaware?
In Delaware, you file an appeal with the Board of Assessment Review. The deadline is 30 days after assessment notice. You can file yourself — no attorney required. File written appeal with the County Board of Assessment Review. Bring comparable sales within your county.
What is the property tax appeal success rate in Delaware?
Approximately 40% of property tax appeals in Delaware result in a reduced assessment. The average annual tax savings for successful appeals is around $750.
What evidence do I need to win a property tax appeal in Delaware?
The strongest evidence is 3–5 recent comparable sales in your neighborhood with sale prices below your assessed value. An independent appraisal is also very effective. You can find comparables on Zillow, Redfin, or your county recorder's public records.
What law governs property tax assessments in Delaware?
Property tax assessments in Delaware are governed by Del. Code tit. 9, § 8312. Under this law, property must be assessed at fair market value — defined as what a willing buyer would pay a willing seller in an arm's-length transaction.
Do I need a lawyer to appeal my property taxes in Delaware?
No. The vast majority of successful Delaware property tax appeals are filed by homeowners without attorneys. You simply need to file your appeal before the deadline and present evidence (comparable sales) showing your property's market value is lower than the assessed value.