New Castle County property record for 20 Millside Dr, Wilmington, DE 19801
| Property Type | Commercial Office |
|---|---|
| Details | 5,060 sqft · built 1987 |
| Lot Size | 15.1 acres (658,192 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $40,000 (Dec 1984) |
| Tax Bill | $6,589 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 10-001.00-023 |
| Primary APN | 10-001.00-023 |
|---|
| Stories | 2 Stories |
|---|---|
| Building Area | 5,060 sqft Gross Area |
| 1st Floor Area | 4,435 sqft |
| Year Built | Built 1987 |
|---|---|
| Effective Year Built | Effective 1987 |
| Exterior Material | Brick |
| Construction Type | Concrete |
| Lot Area | 658,192 sqft (15.1 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | HVAC |
| Sewer | Connected |
| Street Address | 20 MILLSIDE DR |
|---|---|
| City | WILMINGTON |
| State | DE |
| Zip | 19801-5542 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Local Zoning Code | HI |
| Legal Subdivision | SEGALL SUBD |
| Legal Lot Number | 1-B |
| Jurisdiction | NEW CASTLE DE |
| Township / Civil Division | NEW CASTLE |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 15400 |
20 Millside Dr, a commercial property, is owned by two individuals who bought it in December 1984.
Source: New Castle County records, as of May 6, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 104 BENTLEY LN, WILMINGTON, DE 19807-1756 |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 1, 1984 · Amount on File |
| Deed Sale | Dec 1, 1984 · Amount on File |
| Deed Book / Page | 186 / 309 |
| Record Updated | Jun 8, 2026 |
The 2025 property tax bill for 20 Millside Dr was $6,589.
Source: New Castle County assessment roll, as of April 13, 2026
| Type | Name |
|---|---|
| State | Delaware |
| County | New Castle County |
| Unified School District | Colonial School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $6,589.00 | $3,153,900 Land $2,417,600 Building $736,300 |
| 2023 | $273,600 Land $111,700 Building $161,900 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 20 Millside Dr in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective January 21, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | 8.0 ft |
| Flood Insurance Requirement | Required federally backed loans |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 4 in force |
| Nearby Flood Claims | 2 (2022) |
| Most Recent Claim | Jul 2022 · river or lake flooding |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 20 Millside Dr is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 95% of Delaware |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: FCC Broadband Data Collection, based on 76 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fiber | 980 / 880 |
| AT&T Fixed Wireless | 100 / 20 |
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