Suffolk County and Babylon Town property record for 18 William St, Copiague, NY 11726
| Property Type | Single Family Home |
|---|---|
| Details | 1 ba · 1,456 sqft · built 1950 |
| Lot Size | 0.138 acres (6,000 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $9,288 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 472089 180.-4-73 |
| Primary APN | 472089 180.-4-73 |
|---|---|
| Alternative APNs |
|
| Full Baths | 1 Bath |
|---|---|
| Building Area | 1,456 sqft Building Perimeter |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Lot Area | 6,000 sqft (0.138 acres) |
| Lot Dimensions | 100 ft deep x 60 ft wide |
| Account Number | 20252516350 |
|---|---|
| Street Address | 18 WILLIAM ST |
| City | COPIAGUE |
| State | NY |
| Zip | 11726-3714 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | C |
| Legal Description | FILED MAP 1745 LOT 277 |
| Legal Block | 4 |
| Legal Lot Number | 73 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | BABYLON |
| Census Block Group | 2 |
| Census Block | 2019 |
| Census Tract | 123703 |
18 William St is owned and occupied by two individuals who acquired it in May 2003.
Source: Suffolk County and Babylon Town records, as of August 11, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 18 WILLIAM ST, COPIAGUE, NY 11726-3714 |
| 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 |
|---|---|
| Last Transfer Date | May 5, 2003 |
| Transfer Doc | 0122940186 |
| Record Updated | Sep 20, 2026 |
Source: Suffolk County and Babylon Town assessment roll, as of August 11, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Suffolk County |
| County Subdivision | Babylon Town |
| Unified School District | Copiague Union Free School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,610 Land $270 Building $2,340 | $442,373 (+11,254.54%) Land $45,763 Building $396,610 | |
| 2024 | $9,288.00 | $3,896 (-1.47%) Land $403 Building $3,493 | |
| 2023 | $2,610 Land $270 Building $2,340 | $3,954 Land $409 Building $3,545 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 18 William St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 18, 2026 · 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 File median of 10 policies |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 10 in force |
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 18 William St 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 | SUFFOLK COUNTY WATER AUTHORITY serves 1,100,000 people · EPA ID NY5110526 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jan 2024 |
| Lead | 1 ppb (2025–2027) action level 15 ppb |
| Water Quality | Asbestos resolved · Jul 2020 |
|---|---|
| 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 562 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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