New Castle County, Delaware
NCC now accepts online appeals. Use this tool to review your assessment and compare nearby properties for your appeal.
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NCC Property Lookup is a free tool for searching property records in New Castle County, Delaware. Look up any address to view parcel details, tax assessments, deed history, sewer bills, property characteristics, and building sketches — all sourced in real-time from official NCC government records.
Whether you're a homeowner checking your property tax assessment, a real estate professional researching comparable sales, or a buyer doing due diligence, this tool provides instant access to the same public records available through the official New Castle County Parcel Search — with a faster, more user-friendly interface.
Search any address in New Castle County to view: property owner information, parcel number, lot size, subdivision, zoning, land and structure assessments, county and school taxable values, deed transfer history, tax payment history, sewer billing records, property characteristics (year built, bedrooms, bathrooms, square footage, style, condition), building component sketches, and nearby properties on an interactive map.
If you believe your property's assessed value is incorrect, you have the right to file a free appeal with the New Castle County Board of Assessment Review (BOAR). The annual deadline is March 14 at 4:00 PM. NCC now accepts online appeals through their online portal, in addition to mail and email submissions.
Use this tool to review your assessment, check your property characteristics, and compare with nearby properties in your community — all essential information when preparing an appeal. You can browse neighboring properties on the interactive map, view their details, and identify comparable sales to support your case. Visit our Appeals page for downloadable forms, filing instructions, and a complete FAQ on the appeal process.