Suffolk County and Riverhead Town property record for 431 E Main St, Riverhead, NY 11901
| Property Type | Auditorium |
|---|---|
| Details | 151,290 sqft · built 2001 |
| Lot Size | 6.16 acres (268,765 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $328,615 (2024) |
| Flood Zone | Zone AE (high risk) |
| APN | 473000 129.-4-21.3 |
| Primary APN | 473000 129.-4-21.3 |
|---|---|
| Alternative APNs |
|
| Stories | 2 Stories |
|---|---|
| Building Area | 151,290 sqft Gross Area |
| Year Built | Built 2001 |
|---|---|
| Effective Year Built | Effective 2001 |
| Lot Area | 268,765 sqft |
| Lot Dimensions | 100 ft deep x 100 ft wide |
| View / Lot | Below Average |
| Heating Fuel | Gas |
|---|---|
| Water Source | Commercial |
| Account Number | 09 |
|---|---|
| Street Address | 431 E MAIN ST |
| City | RIVERHEAD |
| State | NY |
| Zip | 11901-2556 |
| Property Category | Commercial |
| Property Type | Commercial > Retail > Auditorium |
| Local Zoning Code | 08 |
| Legal Description | ATLANTIS MARINE WORLD 359 0000 1 |
| Legal Subdivision | OSTRANDER PROPERTY |
| Legal Block | 4 |
| Legal Lot Number | 21 |
| Jurisdiction | SUFFOLK NY |
| Township / Civil Division | RIVERHEAD |
| Census Block Group | 4 |
| Census Block | 4026 |
| Census Tract | 169800 |
Source: Suffolk County and Riverhead 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 | Company Name on Record |
|---|---|
| Mailing Address | 200 HOWELL AVE, RIVERHEAD, NY 11901-2515 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Suffolk County and Riverhead Town assessment roll, as of August 11, 2026
| Type | Name |
|---|---|
| State | New York |
| County | Suffolk County |
| County Subdivision | Riverhead Town |
| Unified School District | Riverhead Central School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $5,339,800 (-) Land $383,800 Building $4,956,000 | $65,438,725 (+13.85%) Land $4,703,431 Building $60,735,294 | |
| 2024 | $328,615.00 | ||
| 2023 | $5,339,800 Land $383,800 Building $4,956,000 | $57,479,010 Land $4,131,324 Building $53,347,686 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Source: FEMA National Flood Hazard Layer, effective September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | 7.0 ft |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on Record median of 22 policies |
| Nearby Flood Policies | 22 in force |
| Nearby Flood Claims | 46 (1978–2020) |
| Claims Outside the SFHA | 21 of 46 |
| Most Recent Claim | Apr 2020 · other causes |
| 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 94% of the US · lower than 91% 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 | RIVERHEAD WATER DISTRICT serves 35,000 people · EPA ID NY5103705 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Jul 2025 |
| Lead | 2 ppb (2025–2027) action level 15 ppb |
| Water Quality | Nitrite resolved · Jul 2023 |
|---|---|
| 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 244 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Optimum Fiber · Cable | 8,000 / 8,000 |
May also be available: T-Mobile, Verizon.
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