Delaware Property Tax Consulting Services

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Delaware Property Tax At-a-Glance

Navigating property taxes in Delaware can be a complex and costly undertaking. Our Delaware property tax consultants possess decades of experience working with local taxing authorities, providing you with the tailored guidance needed to achieve multijurisdictional compliance while preventing property tax overpayment.

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Delaware does not impose state-level property tax.

Real property taxes are levied at the local level.

Personal property is not taxable in Delaware.

Local Tax Experts

Speak with a Delaware Property Tax consultant.

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Delaware Property Tax Calendar
Stay ahead of Delaware’s multijurisdictional property tax deadlines with our property tax calendar.
* Recently updated within the last 30 days
Lien Date
Jan 1
Real Property Information
Important dates and information related to real property tax assessments in Delaware.
Appeal Deadline
January 31, March 15 and April 1; varies by jurisdiction. Kent County, DE just reassessed for 2024, and the appeal deadline there is March 15.
Assessment Notice Issue Date
Jan 1
Real Estate Tax Bill Payment Information
Payment deadlines and information for real estate tax bills in Delaware.
Tax Bills Issued
Jul 1
Single Payment Due (Delinquent Date)
Sep 30
First Installment Due (Delinquent Date)
Sep 30
Personal Property Information
Personal property is not taxable in Delaware.
Personal Property Tax Bill Payment Information
Payment deadlines and information for personal property tax bills in Delaware.
* Recently updated within the last 30 days
Delivering Exceptional Tax Strategy Across Delaware
Though Delaware has the fewest counties of any U.S. state, its three jurisdictions—New Castle, Kent, and Sussex—can present challenges for property owners with assets spanning multiple locations. Our Delaware property tax consultants bring deep expertise in local tax regulations, helping Delaware businesses navigate these complexities and develop strategies that optimize your long-term financial outcomes.
New Castle County
As Delaware’s most urban and populous county, New Castle County encompasses several different taxing jurisdictions, each with its own unique property tax rates applicable to residential and commercial properties. In 2018, the county was faced with a Supreme Court order to reassess property values that hadn’t been updated in more than 40 years. This legislative change has exposed issues with uniformity and underassessment in property valuations following a county-wide reassessment in 2024, which goes into effect for 2025. New taxable values have been issued at 100% of market with a valuation date of July 1, 2024, and a five-year reassessment cycle.
Residential Property Tax Rates: The New Castle County commissioners enacted a split tax rate in August 2025, after homeowners reacted to our new bills. As of October 30, 2025, the tax rate change has been challenged in court on uniformity grounds.
Non-Residential Property Tax Rates: Most properties are taxed between 0.83 to 1.49%, depending on jurisdiction. Properties located within city limits are likely at the higher end of the range.
Kent County
Delaware’s Kent County is largely made up of rural and suburban residents working in agriculture, manufacturing, and government. Assessment ratios and mill rates vary across Kent County’s municipalities, with recent tax rate changes requiring careful tracking. Within Kent County, the City of Dover also independently assesses its properties. Taxpayers in this jurisdiction are assessed at both the City and County levels.
Median Effective Tax Rate: Effective tax rates range between 0.36 to 0.6% for county and school districts. City taxes are added separately, based on our respective rates.
Reduced Property Tax Rates: Tax rates were lowered across the state, but values went up (assessment). Following the county-wide reassessment completed in 2024, all parcels now have a 100% market value with a valuation date of July 1, 2023. Kent County is also operating on a five-year reassessment cycle.
Sussex County
Located on Delaware’s coast, Sussex County’s key industries include agriculture, tourism, healthcare, and manufacturing. Like New Castle and Kent counties, Sussex also encompasses several taxing municipalities, each with their own unique tax rates and compliance requirements.
Competitive Property Tax Rates: Sussex County has the lowest property tax burden in the state ranging from 0.21 to 0.39%.
Reassessments: In 2025, Sussex County just completed its first reassessment in 45 years. Appeal opportunities are annual.

Property Tax Solutions That Transform Complexity Into Confidence

Frequently Asked Questions

At Ryan, we provide comprehensive property tax services across your entire portfolio, including commercial, complex, residential, and personal property types. From valuation reviews to appeal support and bill tracking, our Delaware property tax consultants help businesses establish compliance while accelerating efficiency and tax savings. Our tailored approach allows us to create custom strategies that align with your business goals—our property tax services include:
Assessment review
Appeal services
Commercial and multifamily
Budgets and accruals
Pre-acquisition reports
Tax bill administration
Delaware is one of the 12 states that do not impose personal property taxes on businesses. The other states include:
Hawaii
Illinois
Iowa
Minnesota
New Hampshire
New Jersey
New York
North Dakota
Ohio
Pennsylvania
South Dakota
Relative to average rates, Delaware property taxes are quite low. The property tax rates in Delaware vary in each of its three counties:
Sussex County: 0.21 to 0.39%
Kent County: 0.36 to 0.6%
New Castle County: 0.83 to 1.49%
Ensuring your properties are fairly assessed is critical to avoiding tax overpayment. Our Delaware property tax consultants bring extensive local expertise to help businesses evaluate assessments, file appeals, and offer professional representation to ensure you’re paying the taxes you owe, and not a penny more.

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Delaware Property Tax Consulting Services

Delaware Property Tax At-a-Glance

Delaware Property Tax Calendar

Delivering Exceptional Tax Strategy Across Delaware

New Castle County

Kent County

Sussex County

Property Tax Solutions That Transform Complexity Into Confidence

Frequently Asked Questions

What services do Ryan’s Delaware property tax consultants offer?

Which states do not impose personal property taxes on businesses?

What is the property tax rate in Delaware?

Delaware Property Tax At-a-Glance

New Castle County

Kent County

Sussex County

Property Tax Solutions That Transform Complexity Into Confidence

Frequently Asked Questions

What services do Ryan’s Delaware property tax consultants offer?

Which states do not impose personal property taxes on businesses?

What is the property tax rate in Delaware?