New Castle County property record for 300 Harmony St, New Castle, DE 19720
| Property Type | Duplex |
|---|---|
| Details | 3 bd · 2.5 ba · 2,633 sqft · built 1920 |
| Lot Size | 0.09 acres (3,920 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $2,429 (2025) |
| Deeds & Mortgages | Jan 2024 Mortgage Apr 2021 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 21-015.10-119 |
| Primary APN | 21-015.10-119 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Plumbing Fixtures | 12 Plumbing Fixtures |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,633 sqft Living Area |
| 1st Floor Area | 1,421 sqft |
| Flooring | Wood |
| Interior Walls | Plaster |
| Year Built | Built 1920 |
|---|---|
| Effective Year Built | Effective 2014 |
| Architectural Style | Duplex Single |
| Exterior Material | Aluminum/Vinyl |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 3,920 sqft (0.09 acres) |
| Lot Dimensions | 97 ft deep x 37 ft wide |
| Garage Type | Detached |
| Garage Area | 576 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Hot Water |
|---|---|
| Sewer | Connected |
| Street Address | 300 HARMONY ST |
|---|---|
| City | HISTORIC NEW CASTLE |
| State | DE |
| Zip | 19720-4545 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | 21HR |
| Legal Subdivision | NEW CASTLE |
| Jurisdiction | NEW CASTLE DE |
| Township / Civil Division | NEW CASTLE |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 16100 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the New Castle Historic District listed 1984 · 463 contributing resources · NRIS 84000312 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: New Castle County records, as of April 13, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 300 HARMONY ST, HISTORIC NEW CASTLE, DE 19720-4545 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Date | Document |
|---|---|
| Jan 17, 2024 | Deed, Transfer · Seller Carry-Back SANDY MAYER |
| Apr 13, 2021 | Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE |
| Jan 20, 2022 | Deed, Transfer |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jan 17, 2024 |
| Deed Sale | Jan 17, 2024 |
| Prior Sale | Mar 30, 2011 · Amount on Record |
| Deed Document Number | 20243096 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | NEW CASTLE DE |
| Recording Date | Jan 17, 2024 |
| Property Address | 300 HARMONY ST, HISTORIC NEW CASTLE, DE 19720-4545 |
| Document Number | 0000003096 |
| Instrument Date | Dec 28, 2023 |
| Instrument | 20240117-0003096 |
| Transaction Type | Transfer |
| Record Updated | Jan 29, 2024 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 300 HARMONY ST, HISTORIC NEW CASTLE, DE 19720-4545 |
| Investor | Possibly a Property Investor |
| Document Number | 0000003100 |
|---|---|
| Date | Jan 17, 2024 |
| Instrument | 20240117-0003100 |
| Name | SANDY MAYER |
|---|---|
| Type | Seller |
| Type | Seller Carry-Back |
|---|---|
| Amount | Amount Recorded |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | NEW CASTLE DE |
| Property Address | 300 HARMONY ST, HISTORIC NEW CASTLE, DE 19720-4545 |
| Transaction Type | Mortgage |
| Record Updated | Jul 27, 2022 |
| Name | Verified Name |
|---|
| Document Number | 0000043534 |
|---|---|
| Date | Apr 13, 2021 |
| Instrument | 20210413-0043534 |
| Name | UNITED WHOLESALE MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | PONTIAC, MI 48341 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 181 Months |
| Due | May 1, 2036 |
| Document Type | Deed |
|---|---|
| Jurisdiction | NEW CASTLE DE |
| Recording Date | Jan 20, 2022 |
| Property Address | 300 HARMONY ST, HISTORIC NEW CASTLE, DE 19720-4545 |
| Document Number | 0000009356 |
| Instrument Date | Jan 4, 2022 |
| Instrument | 20220120-0009356 |
| Transaction Type | Transfer |
| Record Updated | Jul 27, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 300 HARMONY ST, HISTORIC NEW CASTLE, DE 19720-4545 |
Source: New Castle County assessment roll, as of April 13, 2026
| Type | Name |
|---|---|
| State | Delaware |
| County | New Castle County |
| Municipality | New Castle City |
| Unified School District | Colonial School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $2,429.00 | $437,300 (+488.56%) Land $56,500 Building $380,800 |
| 2023 | $74,300 Land $15,500 Building $58,800 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer, effective January 21, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 61 individual policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 71 units insured incl. 10 condo units |
| Nearby Flood Claims | 22 (1980–2020) |
| Claims Outside the SFHA | 6 of 22 |
| Most Recent Claim | Nov 2020 · rainfall accumulation |
| Claims by Event |
|
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | MUNICIPAL SERVICES COMMISSION serves 5,549 people · EPA ID DE0000634 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Apr 2025 |
| Lead | Under 1 ppb (2023–2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. The service area is an EPA estimate; the actual supplier may differ.
Source: FCC Broadband Data Collection, based on 588 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber | 2,300 / 2,300 |
| Xfinity Cable | 2,000 / 250 |
| AT&T Fixed Wireless | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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