Westchester County and Ossining Town property record for 27 William St, Ossining, NY 10562 · Last verified May 2026
| Property Type | Duplex |
|---|---|
| Details | 3 bd · 2 ba · 1,568 sqft · built 1900 |
| Lot Size | 0.09 acres (3,920 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $50,000 (Apr 1997) |
| Tax Bill | $7,916 (2025) |
| Deeds & Mortgages | Sep 2017 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 554203 97.07-4-79 |
| Primary APN | 554203 97.07-4-79 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,568 sqft Total Area |
| 1st Floor Area | 788 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1900 |
| Architectural Style | Traditional |
| Exterior Material | Aluminum/Vinyl |
| Lot Area | 3,920 sqft (0.09 acres) |
| Lot Dimensions | 119 ft deep x 31 ft wide |
| Porch | Porch |
| Porch Area | 240 sqft |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Oil |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 27 WILLIAM ST |
|---|---|
| City | OSSINING |
| State | NY |
| Zip | 10562-5528 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Block | 4 |
| Legal Lot Number | 79.000 |
| Jurisdiction | WESTCHESTER NY |
| Township / Civil Division | OSSINING |
| Census Block Group | 2 |
| Census Block | 2004 |
| Census Tract | 13304 |
Source: Westchester County and Ossining Town records · APN 554203 97.07-4-79
Assessment roll updated May 14, 2026 · Last verified May 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 27 WILLIAM ST, OSSINING, NY 10562-5528 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Apr 14, 1997 · Amount on Record |
| Deed Sale | Apr 14, 1997 · Amount on Record |
| Deed Book / Page | 11701 / 284 |
| Last Transfer Date | May 25, 2017 |
| Transfer Doc | 0571453414 |
| Record Updated | Jun 08, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | WESTCHESTER NY |
| Recording Date | Sep 21, 2017 |
| Property Address | 27 WILLIAM ST, OSSINING, NY 10562-5528 |
| Document Number | 0571453414 |
| Book / Page | 057145 / 003414 |
| Instrument Date | May 24, 2017 |
| Transaction Type | Transfer |
| Record Updated | Jul 18, 2019 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 27 WILLIAM ST OSSINING NY 105625528, OSSINING, NY 10562-5528 |
Source: Westchester County and Ossining Town records · Assessment roll updated May 14, 2026 · Last verified May 2026
| Type | Name |
|---|---|
| State | New York |
| County | Westchester County |
| County Subdivision | Ossining Town |
| Municipality | Ossining Village |
| Unified School District | Ossining Union Free School District (PK - 12) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $7,916.00 | $437,100 (+6.82%) Land $200,300 Building $236,800 | $437,100 (+6.82%) Land $200,300 Building $236,800 |
| 2024 | Additional exemption filed | $409,200 (+7.37%) Land $109,100 Building $300,100 | $409,200 (+7.37%) Land $109,100 Building $300,100 |
| 2023 | $381,100 Land $109,100 Building $272,000 | $381,100 Land $109,100 Building $272,000 |
Source: FEMA National Flood Hazard Layer, Westchester County (36119C), updated September 18, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 361190133042, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 2 (2009–2021) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Sep 2021, river or lake flooding, Remnants Of Hurricane Ida |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 616 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Optimum Communications | Fiber | 8,000 / 8,000 |
| Verizon | Fiber | 2,300 / 2,300 |
| Optimum Communications | Cable | 940 / 35 |
| Starlink | Satellite (low-earth orbit) | 280 / 30 |
May also be available at this address: Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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