Nassau County and North Hempstead Town property record for 21 Vanderventer Ave, Port Washington, NY 11050
| Property Type | Commercial Office |
|---|---|
| Details | 12,999 sqft · built 1985 |
| Lot Size | 0.149 acres (6,500 sqft) |
| Owner | Company Name on Record |
| Last Sale | $1,000,000 (Nov 2015) |
| Tax Bill | $38,870 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 05-099-00-0017 |
| Primary APN | 05-099-00-0017 |
|---|---|
| Alternative APNs |
|
| Stories | 1 Story |
|---|---|
| Building Area | 12,999 sqft Gross Area |
| 1st Floor Area | 8,666 sqft |
| Interior Walls | Finished/Painted |
| Elevator | Elevator |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1985 |
| Exterior Material | Brick/Stone |
| Construction Type | Steel Frame |
| Fire Resistance | Masonry Walls, Wood Interior |
| Lot Area | 6,500 sqft (0.149 acres) |
| Lot Dimensions | 10 ft deep x 6.5 ft wide |
| View / Lot | Central Business District |
| Garage Area | 3,843 sqft |
| Parking Spaces | 13 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | HVAC |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 05099 00170 |
|---|---|
| Street Address | 21 VANDERVENTER AVE |
| City | PORT WASHINGTON |
| State | NY |
| Zip | 11050-3710 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | 17 & 325 |
| Legal Block | 99 |
| Legal Lot Number | 17 |
| Jurisdiction | NASSAU NY |
| Township / Civil Division | NORTH HEMPSTEAD |
| Census Block Group | 3 |
| Census Block | 3004 |
| Census Tract | 301300 |
Source: Nassau County and North Hempstead 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 | 444 MADISON AVE, 5, NEW YORK, NY 10022-6906 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Nov 12, 2015 · Amount on Record |
| Deed Sale | Nov 12, 2015 · Amount on Record |
| Deed Document Number | 201523760 |
| Deed Book / Page | 13283 / 601 |
| Record Updated | Sep 20, 2026 |
Source: Nassau County and North Hempstead Town assessment roll, as of June 17, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Nassau County |
| County Subdivision | North Hempstead Town |
| Unified School District | Port Washington Union Free School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $4,472 (-8.68%) Land $1,899 Building $2,573 | $447,200 (-8.68%) | |
| 2025 | $38,870.00 (+0.5%) | ||
| 2023 | $38,676.00 | $4,897 Land $2,080 Building $2,817 | $489,700 |
Assessed value is set for property tax purposes, not a market price estimate; it is 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 |
| Nearby Flood Claims | 4 (1980–1982) |
| Claims Outside the SFHA | 2 of 4 |
| Most Recent Claim | Jan 1982 · rainfall accumulation |
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 | None beyond 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 | PORT WASHINGTON WD public/private · serves 34,000 people · EPA ID NY2912267 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jun 2023 |
| Lead | 2 ppb (2022–2024) 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 547 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber · Fixed Wireless in parts of the area | 2,300 / 2,300 |
May also be available: T-Mobile.
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