Nassau County and Oyster Bay Town property record for 21 Lex Ave, Plainview, NY 11803
| Property Type | Single Family Home |
|---|---|
| Details | 1.5 ba · 1,358 sqft · built 1955 |
| Lot Size | 0.182 acres (7,920 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $13,761 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 46-558-00-0012 |
| Primary APN | 46-558-00-0012 |
|---|---|
| Alternative APNs |
|
| Full Baths | 1.5 Baths |
|---|---|
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,358 sqft Living Area |
| 1st Floor Area | 1,008 sqft |
| Basement Area | 252 sqft |
| Finished Basement | 252 sqft |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1955 |
| Architectural Style | Split Level |
| Exterior Material | Brick/Stone |
| Construction Type | Frame |
| Roof Material | Other |
| Lot Area | 7,920 sqft (0.182 acres) |
| Lot Dimensions | 103 ft deep x 50 ft wide |
| Garage Type | Basement |
| Parking Spaces | 1 Parking Space |
| Balcony Area | 66 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Oil |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 46558 00120 |
|---|---|
| Street Address | 21 LEX AVE |
| City | PLAINVIEW |
| State | NY |
| Zip | 11803-5913 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TOWN #3 SCH DIST 021 |
| Legal Block | 558 |
| Legal Lot Number | 12 |
| Jurisdiction | NASSAU NY |
| Township / Civil Division | OYSTER BAY |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 519900 |
21 Lex Ave is owned and occupied by two individuals.
Source: Nassau County and Oyster Bay Town records, as of June 17, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 21 LEX AVE, PLAINVIEW, NY 11803-5913 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 21 Lex Ave was $13,761.
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 |
| Unified School District | Bethpage Union Free School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $483 (-2.03%) Land $264 Building $219 | $483,000 (-2.03%) | |
| 2025 | $13,761.00 | $493 Land $270 Building $223 | $493,000 |
| 2023 | $13,428.00 Additional exemption filed | $535 Land $293 Building $242 | $535,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 21 Lex Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1993.
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 Policies | 1 in force |
| Nearby Flood Claims | 1 (1993) |
| Most Recent Claim | Mar 1993 · Severe Blizzard |
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.
The area around 21 Lex Ave has no burnable land within ember reach, so its wildfire risk is not rated.
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 | BETHPAGE WD serves 33,000 people · EPA ID NY2902817 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jul 2025 |
| Lead | Under 1 ppb (2021–2023) 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 677 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
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