Suffolk County and Brookhaven Town property record for 21 Walnut Ave, Setauket, NY 11733
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 796 sqft · built 1950 |
| Lot Size | 0.22 acres (9,583 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $585,000 (Nov 2021) |
| Tax Bill | $8,731 (2024) |
| Deeds & Mortgages | Nov 2017 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 0205-007.00-05.00-018.000 |
| Primary APN | 0205-007.00-05.00-018.000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 796 sqft Living Area |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | Ranch |
| Exterior Material | Wood |
| Lot Area | 9,583 sqft (0.22 acres) |
| View / Lot | Waterfront |
| Heating System | Radiant |
|---|
| Account Number | 405440 |
|---|---|
| Street Address | 21 WALNUT AVE |
| City | SETAUKET |
| State | NY |
| Zip | 11733-4019 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | BAY VIEW PARK 449 141&141A E10FT 14 |
| Legal Subdivision | BAY VIEW PARK |
| Legal Block | 7000 |
| Legal Lot Number | 500 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | BROOKHAVEN |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 158001 |
Source: Suffolk County and Brookhaven Town records, as of August 11, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 21 WALNUT AVE, SETAUKET, NY 11733-4019 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Nov 3, 2021 · Amount on Record |
| Deed Sale | Nov 3, 2021 · Amount on Record |
| Deed Book / Page | 13127 / 661 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Nov 13, 2017 |
| Property Address | 21 WALNUT AVE, SETAUKET, NY 11733-4019 |
| Document Number | 0129370483 |
| Book / Page | 012937 / 000483 |
| Instrument Date | Oct 20, 2017 |
| Transaction Type | Transfer |
| Record Updated | Jan 3, 2018 |
| Title Company | PRO NATIONAL TITLE AGENCY |
| Amount | Amount Recorded |
|---|---|
| Tax | $1,600.00 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 42 JOHN ST PORT JEFFERSON STATION NY 117763923, PORT JEFFERSON STATION, NY 11776-3923 |
Source: Suffolk County and Brookhaven Town assessment roll, as of August 11, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Suffolk County |
| County Subdivision | Brookhaven Town |
| Municipality | Poquott Village |
| Unified School District | Three Village Central School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,000 (-) Land $250 Building $1,750 | $416,666 (+11,149.08%) Land $47,170 Building $330,189 | |
| 2024 | $8,731.00 | ||
| 2023 | $2,000 Land $250 Building $1,750 | $3,704 Land $463 Building $3,241 |
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 September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone VE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 20 policies |
| Nearby Flood Policies | 20 in force |
| Nearby Flood Claims | 15 (1983–2024) |
| Claims Outside the SFHA | 9 of 15 |
| Most Recent Claim | Aug 2024 · Severe Storm And Flooding |
| 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 93% of the US · lower than 89% of New York |
|---|---|
| Wildfire Likelihood | Under 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 | 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 184 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
| Verizon Fiber | 980 / 880 |
| T-Mobile Fixed Wireless | 100 / 20 |
Search by:
By searching, you agree to: Terms • Privacy • Disclosures