Suffolk County and Brookhaven Town property record for 4 Riverside Ave, Mastic Beach, NY 11951
| Property Type | Single Family Home |
|---|---|
| Lot Size | 1.01 acres (44,431 sqft) |
| Owner | Individual Name on File |
| Last Sale | $520,000 (May 2023) |
| Tax Bill | $8,253 (2024) |
| Deeds & Mortgages | May 2023 Sale Apr 2019 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 0200-940.00-08.00-004.000 |
| Primary APN | 0200-940.00-08.00-004.000 |
|---|---|
| Alternative APNs |
|
| Lot Area | 44,431 sqft |
|---|---|
| View / Lot | Waterfront |
| Account Number | 4108200 |
|---|---|
| Street Address | 4 RIVERSIDE AVE |
| City | MASTIC BEACH |
| State | NY |
| Zip | 11951-1102 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | MAP MASTIC ACRES UNIT 7 |
| Legal Block | 8 |
| Legal Lot Number | 800 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | BROOKHAVEN |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 159512 |
4 Riverside Ave is owned and occupied by an individual who bought it in May 2023.
Source: Suffolk County and Brookhaven Town records, as of August 11, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 4 RIVERSIDE AVE, MASTIC BEACH, NY 11951-1102 |
| 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.
| Date | Document |
|---|---|
| May 24, 2023 | Deed, Transfer OLD REPUBLIC TITLE |
| Apr 11, 2019 | Grant Deed, Transfer NOT AVAILABLE |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | May 24, 2023 · Amount on File |
| Deed Sale | May 24, 2023 · Amount on File |
| Prior Sale | Apr 11, 2019 · Amount on File |
| Deed Book / Page | 13202 / 705 |
| Prior Transfer Date | Jul 3, 2015 |
| Prior Transfer Doc | 0128240639 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | May 24, 2023 |
| Property Address | 4 RIVERSIDE AVE, MASTIC BEACH, NY 11951-1102 |
| Document Number | 0132020705 |
| Book / Page | 13202 / 705 |
| Instrument Date | Feb 27, 2023 |
| Transaction Type | Transfer |
| Record Updated | Feb 20, 2024 |
| Title Company | OLD REPUBLIC TITLE |
| Amount | Amount on Record |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 122 RAILROAD AVE, CENTER MORICHES, NY 11934-1904 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Recording Date | Apr 11, 2019 |
| Property Address | 4 RIVERSIDE AVE, MASTIC BEACH, NY 11951-1102 |
| Document Number | 0130080053 |
| Book / Page | 013008 / 000053 |
| Instrument Date | Feb 20, 2019 |
| Transaction Type | Transfer |
| Record Updated | Nov 27, 2019 |
| Title Company | NOT AVAILABLE |
| Amount | Amount on Record |
|---|---|
| Tax | $783.41 |
| Amount Accuracy | Confirmed |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Husband and Wife |
| Address | 2 DANA CT MASTIC BEACH NY 119511111, MASTIC BEACH, NY 11951-1111 |
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 |
| Unified School District | William Floyd Union Free School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $2,050 Land $325 Building $1,725 | $427,083 Land $61,321 Building $325,472 | |
| 2024 | $8,253.00 | ||
| 2023 | $2,050 (-) Land $325 Building $1,725 | $3,796 (+14.82%) Land $602 Building $3,194 | |
| 2022 | $2,050 Land $325 Building $1,725 | $3,306 Land $524 Building $2,782 |
Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.
FEMA maps place 4 Riverside Ave in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
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 AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 30 policies |
| Community Rating System | Class 10 (0% premium discount) |
| Nearby Flood Policies | 30 in force |
| Nearby Flood Claims | 52 (1978–2024) |
| Claims Outside the SFHA | 5 of 52 |
| Most Recent Claim | Jan 2024 · rainfall accumulation |
| 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.
Wildfire risk around 4 Riverside Ave is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 98% of the US · lower than 97.9% 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 376 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
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