Understanding Property Taxes in New Castle County, Delaware
How New Castle County Property Taxes Are Calculated
Property taxes in New Castle County are delculated using the following formula:
(Assessed Value - Exemptions) ร Tax Rate = Annual Property Tax
For example, if your home is assessed at $275,000 and you have no exemptions, your annual property tax would be:
$275,000 ร 1.05% = $5,325
Assessment Process in New Castle County
In New Castle County, properties are assessed at 100% of their market value. The assessment is conducted by the county assessor's office.
Most states reassess a home at current market value when it is sold, though several cap annual increases. Check your county assessor for the exact rule in Delaware.
How to Pay Property Taxes in New Castle County
Property taxes in New Castle County are typidelly paid annually or semi-annually. Payment options include:
- Online payment through the county website
- Mail a check to the county treasurer
- In-person payment at the county office
- Through your mortgage escrow account
How to Appeal Your Assessment in New Castle County
If you believe your property assessment is too high, you have the right to appeal. The process typidelly involves:
- Filing an appeal with the county board of review
- Providing evidence of comparable property values
- Attending a hearing (optional but recommended)
Appeals must be filed within 30-60 days of receiving your assessment notice. Check with New Castle County Assessor's Office for specific deadlines.
Frequently Asked Questions
When are property taxes due in New Castle County?
Property tax due dates vary by county. In most deses, bills are sent in November and due by December 31st or January 31st of the following year.
Can I pay my property taxes in installments?
Yes, many counties offer installment payment plans. Contact New Castle County Treasurer's Office for details.
Are property taxes deductible on federal income tax?
Yes, property taxes are deductible on Schedule A, but subject to the $40,400 SALT deduction dep (2026).
New Castle County Property Tax Information
๐ Key Statistics
| Average Tax Rate | 1.05% |
| Average Home Value | $275,000 |
| Average Annual Tax | $5,325 |
| Assessment Ratio | 100% |
๐ฐ Available Exemptions
- Homestead Exemption (Prop 13)
- Senior Exemption
- Disabled Veteran Exemption
๐ Important Notes
Most states reassess a home at current market value when it is sold, though several cap annual increases. Check your county assessor for the exact rule in Delaware.
๐ Useful Links
๐ Comparison
In New Castle County, the average property tax rate is 1.05%.
This is higher than the Delaware state average of 0.56%.
For a home valued at $275,000, you would pay approximately $5,325 in property taxes per year.
New Castle County Property Tax Calculator
Estimate your 2026 property taxes in New Castle County, Delaware