New Castle County tax records are public and free to search online through the county’s Parcel Search portal or its GIS mapping tools, and they’ll show you a property’s assessed value, owner of record, parcel identification number, current tax bill, payment status, and sales history. If you need a stamped copy for a closing, an estate, or a court filing, the Recorder of Deeds at the Government Center in New Castle issues certified copies for a per-page fee.
What Shows Up on a New Castle County Tax Record
Delaware Code Title 9, Chapter 83 requires the county’s Office of Finance to keep written assessment records that split the value of the land from the value of any improvements on it.1Delaware Code Online. Delaware Code Title 9 Chapter 83 – Valuation and Assessment of Property Each record identifies the owner of record, a mailing address, and a land use code classifying the parcel as residential, commercial, agricultural, or something else. A mistake in the owner’s name doesn’t invalidate the assessment.
On the money side, you’ll see the assessed value broken out between land and improvements, the county and school district tax rates that apply, the total annual tax bill, and whether that bill has been paid. Every parcel also carries a unique parcel identification number that tracks it across county systems. For a buyer running due diligence, the payment history is the quickest way to check for unpaid taxes that could become a lien against the property you’re about to purchase.
Searching Property Tax Records Online
The county’s main lookup is the Parcel Search portal, which lives on a separate site from the main county page.2New Castle County, DE – Official Website. Document Search You can search by owner name, street address, or parcel ID, and the results include the current bill, assessed value, ownership, and sales history.
If you’d rather see the property in context, use the county’s GIS tools through its ArcGIS hub. The NCCDE Tax Map Viewer lets you search by parcel ID or click directly on an interactive map to bring up boundaries and ownership data.3New Castle County GIS Maps. New Castle County GIS Maps A companion tool, Explore New Castle County, overlays zoning, council districts, historic districts, development activity, and future land use. Both are free.
Search tips that save time: if you only have an address, the Parcel Search accepts partial matches, but the GIS viewer needs an exact parcel ID or a map click. Have the parcel number handy whenever you can — it’s the fastest and most reliable way to pull a specific property.
Getting Printed and Certified Copies
Online records are enough for most personal research. For a real estate transaction, an estate settlement, or a lawsuit, you’ll usually need paper copies from the Recorder of Deeds.
A basic tax printout costs $1 per parcel in person or $2 per parcel by mail.4New Castle County, DE. Fee Schedule Uncertified copies are $0.50 per page if you print them yourself and $1 per page if staff prints them. Certified copies run $3 per page if you supply the recorded copies, or $6 per page if the office prints them, plus a $1 certification fee per document.
Bring the parcel identification number or full property address. If you’re asking for certified copies, name the specific tax year or years. Mailed requests must be paid by check or money order; in person, the office accepts cash, checks, money orders, or debit cards.5New Castle County, DE – Official Website. href=”https://www.newcastlede.gov/232/Tax-Information-Forms” target=”_blank” rel=”noopener”>Tax Information and Forms The Recorder of Deeds and the Office of Finance are both in the New Castle County Government Center at 87 Reads Way.6New Castle County, DE. Recorder of Deeds
Reading the Assessed Value After the 2024 Reassessment
If you’re comparing an old tax record to a current one, the numbers will not match, and the reason is structural. For more than four decades the county calculated taxes on values frozen at 1983 levels. A 2020 court ruling declared Delaware’s property tax system unconstitutional, and New Castle County completed its first reassessment in 2024, bringing values in line with current market conditions.
The shift was significant. County data shows that before the reassessment, residential properties carried about 66% of the overall tax burden; after, that share rose to roughly 76%. Many homeowners saw their assessments jump while some commercial properties saw relative decreases. The county maintains a Property Tax Change Estimator that lets owners compare old and new figures side by side.7New Castle County, DE. Reassessment Project Information Litigation over the rollout delayed revised bills in 2025, so if a record you’re viewing looks inconsistent with what you expected, check the reassessment project page for the current status.
How Assessed Value Turns Into the Tax Bill
Two numbers drive the total on any record: the assessed value and the millage rate, which is a dollar amount per $1,000 of assessed value. Your combined rate is the county rate plus your school district rate, and if the property sits inside an incorporated municipality, the town rate is added on top.
Worked example: an assessed value of $200,000 at a combined millage of $10 per $1,000 produces a $2,000 annual bill. Current rates are published on the county’s Tax Information page and can move year to year with school referendums and county budget changes.8New Castle County, DE – Official Website. Tax Information and Forms
Checking Payment Status and Unpaid Taxes
The payment status line on a tax record matters most when you’re buying. County property taxes and local school taxes are normally due September 30 each year, though the 2025 deadline was pushed to December 31 because of the reassessment rollout.8New Castle County, DE – Official Website. Tax Information and Forms
Unpaid taxes are not just a paper problem. Under Delaware Code, the Office of Finance can start attachment proceedings against anyone with unpaid taxes from prior years starting January 1 of the following year.9Delaware Code Online. Delaware Code Title 9 Chapter 87 – Collection of Delinquent Taxes – Attachment of Land in New Castle County The county files an affidavit stating the amount owed, a court issues an attachment writ to the sheriff returnable within 15 days, and if the owner doesn’t respond, the court can enter judgment and order the property sold. Council may authorize a bidder to take title in the county’s name if no private buyer pays more. So a record showing prior-year balances is a real warning sign, not a formality.
Appealing an Assessment You Think Is Wrong
If the assessed value on your record looks too high, you can appeal to the New Castle County Board of Assessment Review. The board hears cases from owners challenging their assessment and appeals from denied exemption applications, and it has authority to order the Office of Finance to reduce a value.10New Castle County, DE. Board of Assessment Review
The filing deadline under Delaware Code is March 15. You submit a written notice on the board’s prescribed form, identifying the assessment you’re challenging and providing your contact information.1Delaware Code Online. Delaware Code Title 9 Chapter 83 – Valuation and Assessment of Property The board schedules a hearing at the Government Center and gives at least 10 days’ notice. Miss the hearing and the appeal is treated as abandoned.
What actually works at the hearing is evidence, not argument. Comparable sales data — recent sales of similar nearby properties at prices below your assessed value — is the strongest showing. Factual errors in your property record are another good angle: wrong square footage, wrong bedroom count, features listed that don’t exist. Bring documentation, whether that’s a recent appraisal, contractor estimates for repairs, or building permits with correct measurements. Personal financial hardship and automated online estimates from sites like Zillow do not carry weight.
The board must notify you in writing within 30 days. If you disagree with its decision, you can appeal to Delaware Superior Court within 30 days of receiving it, but the board’s determination is presumed correct and the burden is on you to show it acted improperly.1Delaware Code Online. Delaware Code Title 9 Chapter 83 – Valuation and Assessment of Property With so many owners contesting reassessed values, filing early and having your evidence organized before the hearing is worth doing.