Rockland County and Orangetown Town property record for 20 Dederer St, Tappan, NY 10983
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,436 sqft · built 1927 |
| Lot Size | 0.169 acres (7,405 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $475,000 (Sep 2016) |
| Deeds & Mortgages | Aug 2025 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 392489 74.20-3-55 |
| Primary APN | 392489 74.20-3-55 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Stories | 2 Stories |
| Building Area | 1,436 sqft Living Area |
| 1st Floor Area | 788 sqft |
| 2nd Floor Area | 648 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1927 |
|---|---|
| Effective Year Built | Effective 2009 |
| Architectural Style | Traditional |
| Exterior Material | Composition/Composite |
| Lot Area | 7,405 sqft (0.169 acres) |
| Garage Type | Detached |
| Garage Area | 294 sqft |
| Parking Spaces | 1 Parking Space |
| Pool Type | In-Ground Vinyl Pool |
|---|---|
| Pool Area | 496 sqft |
| Porch | Covered Porch |
| Porch Area | 32 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Hot Water |
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 0026866 |
|---|---|
| Old Parcel Number | 248907402000030550000000 |
| Street Address | 20 DEDERER ST |
| City | TAPPAN |
| State | NY |
| Zip | 10983-1712 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RG |
| Legal Description | 60/55/474/3 |
| Legal Subdivision | SECTIONS A & B OF SPARKILL ESTATES |
| Legal Block | 3 |
| Legal Lot Number | 55.000 |
| Jurisdiction | ROCKLAND NY |
| Township / Civil Division | ORANGETOWN |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 13402 |
Source: Rockland County and Orangetown Town records, as of December 26, 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Co-owner | Co-owner on Record |
| Mailing Address | 20 DEDERER ST, TAPPAN, NY 10983-1712 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 12, 2016 · Amount on Record |
| Deed Sale | Sep 12, 2016 · Amount on Record |
| Deed Document Number | 0201626662 |
| Deed Book / Page | 2016 / 26662 |
| Record Updated | Jun 8, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ROCKLAND NY |
| Property Address | 20 DEDERER ST, TAPPAN, NY 10983-1712 |
| Transaction Type | Mortgage |
| Record Updated | Oct 1, 2025 |
| Name | Verified Name |
|---|
| Document Number | 0000026679 |
|---|---|
| Date | Aug 29, 2025 |
| Instrument | 2025-00026679 |
| Name | TD BANK NA |
|---|---|
| Type | Bank |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Aug 17, 2055 |
Source: Rockland County and Orangetown Town assessment roll, as of May 31, 2024
| Type | Name |
|---|---|
| State | New York |
| County | Rockland County |
| County Subdivision | Orangetown Town |
| Unified School District | South Orangetown Central School District (PK - 12) |
| Year | Assessed Value | Assessed Market Value |
|---|---|---|
| 2024 | $152,700 (-) Land $36,000 Building $116,700 | $447,276 (+4.36%) Land $105,448 Building $341,828 |
| 2023 | $152,700 Land $36,000 Building $116,700 | $428,571 Land $101,038 Building $327,533 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
Source: FEMA National Flood Hazard Layer, effective August 19, 2025 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 19 policies |
| Nearby Flood Policies | 19 in force |
| Nearby Flood Claims | 33 (1979–2025) |
| Claims Outside the SFHA | 12 of 33 |
| Most Recent Claim | Jan 2025 · other causes |
| 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 | Low lower than 80% of the US · above 54% of New York |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 | VEOLIA WATER NEW YORK private · serves 270,000 people · EPA ID NY4303673 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Mar 2023 |
| Lead | 3 ppb (2026) 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.
Source: FCC Broadband Data Collection, based on 255 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber | 980 / 880 |
| T-Mobile Fixed Wireless | 100 / 20 |
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