Blog · September 28, 2026
Wilmington Delaware Plat Maps
Wilmington, Delaware plat maps are the recorded subdivision sheets for that place. They are not a survey.
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The search
People type "Wilmington Delaware Plat Maps" when they want the recorded plat, the lot-and-block sheet, or the parcel map for land in Wilmington, Delaware. New Castle County is the plat source for Wilmington.
Where the sheet is kept
Start with New Castle County. A city street map, a zoning map, and a pin on an aerial photo are not the plat. The recorded plat is the subdivision drawing in the land records. The public GIS layer is the assessor parcel map.
Open the directory
Use the Delaware page on Platbookmapper and find New Castle County. Match the parcel ID from the tax bill before you trust an address pin.
What the search will not do
It will not draw your lot line. Parcel lines on a public map are an assessment layer, not a boundary survey. When the corner itself is the question, you need the recorded plat and, if the line is in dispute, a licensed surveyor.
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey.