Nassau County and Oyster Bay Town property record for 510 Split Rock Rd, Syosset, NY 11791
| Property Type | City, Municipal, Town, Village Owned (Exempt) |
|---|---|
| Details | 10.5 ba · 11,877 sqft · built 1928 |
| Lot Size | 24.5 acres (1,067,220 sqft) |
| Owner | Company Name on Record |
| Last Sale | $5,800,000 (Nov 2007) |
| Flood Zone | Zone X (minimal risk) |
| APN | 25-00B-00-0597 |
| Primary APN | 25-00B-00-0597 |
|---|---|
| Alternative APNs |
|
| Full Baths | 10.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Total Rooms | 36 Rooms |
| Units | 12 Units |
| Stories | 2 Stories |
| Building Area | 11,877 sqft Gross Area |
| 1st Floor Area | 4,040 sqft |
| Basement Area | 1,450 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1928 |
|---|---|
| Effective Year Built | Effective 1928 |
| Architectural Style | Mansion |
| Exterior Material | Wood |
| Construction Type | Frame |
| Lot Area | 1,067,220 sqft (24.5 acres) |
| View / Lot | Major Commercial Strip |
| Garage Type | Attached |
| Garage Area | 324 sqft |
| Porch | Slab |
|---|---|
| Porch Area | 655 sqft |
| Patio Area | 130 sqft |
| Shed | 1 Shed |
| Shed Area | 624 sqft |
| Total Buildings | 3 Buildings |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Oil |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 25 B 05970 |
|---|---|
| Street Address | 510 SPLIT ROCK RD |
| City | SYOSSET |
| State | NY |
| Zip | 11791-1512 |
| Property Category | Public Works |
| Property Type | Public Works > City, Municipal, Town, Village Owned (Exempt) |
| Legal Description | TOWN #3 SCH DIST 012 |
| Legal Block | B |
| Legal Lot Number | 597 |
| Jurisdiction | NASSAU NY |
| Township / Civil Division | OYSTER BAY |
| Census Block Group | 2 |
| Census Block | 2012 |
| Census Tract | 518201 |
Source: Nassau County and Oyster Bay Town records, as of June 17, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 54 AUDREY AVE, OYSTER BAY, NY 11771-1504 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 7, 2007 · Amount on Record |
| Deed Sale | Nov 7, 2007 · Amount on Record |
| Deed Book / Page | 12335 / 833 |
| Record Updated | Sep 20, 2026 |
Source: Nassau County and Oyster Bay Town assessment roll, as of June 17, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Nassau County |
| County Subdivision | Oyster Bay Town |
| Municipality | Oyster Bay Cove Village |
| Unified School District | Syosset Central School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $5,134 (-) Land $2,709 Building $2,425 | $5,134,000 (-) | |
| 2023 | Additional exemption filed | $5,134 Land $2,709 Building $2,425 | $5,134,000 |
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 April 5, 2023 · 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 18 policies |
| Nearby Flood Policies | 18 in force |
| Nearby Flood Claims | 18 (1978–2024) |
| Claims Outside the SFHA | 10 of 18 |
| Most Recent Claim | Mar 2024 · 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 | Low lower than 80% of the US · above 54% of New York |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | JERICHO WD public/private · serves 58,000 people · EPA ID NY2902831 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Oct 2023 |
| Lead | 2 ppb (2026) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | Corrosion control Jul 2023 |
| 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 62 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber | 2,300 / 2,300 |
May also be available: T-Mobile.
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