Nassau County and Oyster Bay Town property record for 23 Ontario Ave, Plainview, NY 11803
| Property Type | Single Family Home |
|---|---|
| Details | 2 ba · 1,434 sqft · built 1954 |
| Lot Size | 0.142 acres (6,200 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $14,316 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 12-009-00-0058 |
| Primary APN | 12-009-00-0058 |
|---|---|
| Alternative APNs |
|
| Full Baths | 2 Baths |
|---|---|
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,434 sqft Living Area |
| Gross Area | 1,644 sqft |
| 1st Floor Area | 936 sqft |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1954 |
| Architectural Style | Cape Cod |
| Exterior Material | Brick/Stone |
| Construction Type | Frame |
| Roof Material | Other |
| Lot Area | 6,200 sqft (0.142 acres) |
| Lot Dimensions | 100 ft deep x 62 ft wide |
| Garage Type | Attached |
| Garage Area | 210 sqft |
| Parking Spaces | 1 Parking Space |
| Patio Area | 240 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Heating Fuel | Oil |
| Sewer | Municipal |
| Water Source | Commercial |
| Account Number | 12009 00580 |
|---|---|
| Street Address | 23 ONTARIO AVE |
| City | PLAINVIEW |
| State | NY |
| Zip | 11803-3444 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | TOWN #3 SCH DIST 019 |
| Legal Block | 9 |
| Legal Lot Number | 58 |
| Jurisdiction | NASSAU NY |
| Township / Civil Division | OYSTER BAY |
| Census Block Group | 2 |
| Census Block | 2005 |
| Census Tract | 519601 |
23 Ontario Ave is owned and occupied by two individuals.
Source: Nassau County and Oyster Bay Town records, as of June 17, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 23 ONTARIO AVE, PLAINVIEW, NY 11803-3444 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 23 Ontario Ave was $14,316.
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 | Plainview-Old Bethpage Central School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $504 (+4.56%) Land $265 Building $239 | $504,000 (+4.56%) | |
| 2025 | $14,316.00 | $482 Land $253 Building $229 | $482,000 |
| 2023 | $14,506.00 Additional exemption filed | $534 Land $281 Building $253 | $534,000 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 23 Ontario Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1979.
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 | 2 in force |
| Nearby Flood Claims | 1 (1979) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 1979 · 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.
The area around 23 Ontario 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 | PLAINVIEW WD public/private · serves 34,000 people · EPA ID NY2902845 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jun 2024 |
| Lead | Under 1 ppb (2021–2023) action level 15 ppb |
| Water Quality | Tetrachloroethylene resolved · Jul 2017 cis-1,2-Dichloroethylene resolved · Jul 2017 |
|---|---|
| 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 716 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
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