| Primary address | 21 River Street, Sayville |
| Zip code | 11782 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 409-4-55 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 10/20/2020 |
| Sale price | $785,000 |
| Arm's length | Register |
| Property tax | $17,015 |
| Building sqft | 3,944 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.39 |
| Year built | 1925 |
| Zoning district | Register |
| School district | Sayville |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
21 River Street, Sayville, NY 11782 was built in 1925 and has a total of 3,944 square feet.
What is the assessed value of 21 River Street, Sayville, NY 11782 and the property tax paid?Assessed at $56,500, the tax amount paid for 21 River Street, Sayville, NY 11782 is $17,014.
When was 21 River Street, Sayville, NY 11782 last sold and what was the last sale price?21 River Street, Sayville, NY 11782 was last sold in 10/20/2020 for $785,000.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 21 River Street, Sayville, including title documents, transfer conditions, mortgages and liens.
*Here are the three most recent sales for this property.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 21 River Street, Sayville, NY 11782. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $17,015 |
| Market value | $795,774 |
| Assessed value | $56,500 |
Here's the assessment & property tax history for 21 River Street, Sayville, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|---|
| 2024-2025 | $754,929 | $53,600 | 28.936 | $15,510 | +5.54% |
| 2023-2024 | $736,263 | $53,600 | 27.418 | $14,696 | +2.17% |
| 2022-2023 | $647,343 | $53,600 | 26.836 | $14,384 | -0.83% |
| 2021-2022 | $577,586 | $53,600 | 27.061 | $14,505 | +6.43% |
| 2020-2021 | $525,773 | $51,000 | 26.722 | $13,628 | -25.83% |
The complete history of permits filed for 21 River Street, Sayville, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.
Create a free account to unlock extended information for 21 River Street, Sayville, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | 0.2, X (See more on map) |
Access the detailed traffic volume map for 21 River Street, Sayville to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
| View daily traffic map |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Prince Of Peace Regional School | NR | Private | PK, K-8 | 194 | 0.56 |
| Prince Of Peace Regional School | NR | Private | PK, K-8 | 194 | 0.56 |
| Cherry Avenue Elementary School | 7 | Public | K-5 | 354 | 1.10 |
| West Sayville Christian School | NR | Private | K-9 | 37 | 1.12 |
| Academy Street Elementary School | 9 | Public | K-5 | 303 | 1.13 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Prince Of Peace Regional School | NR | Private | PK, K-8 | 194 | 0.56 |
| West Sayville Christian School | NR | Private | K-9 | 37 | 1.12 |
| Sayville Middle School | 7 | Public | 6-8 | 619 | 2.09 |
| James Wilson Young Middle School | 6 | Public | 6-8 | 398 | 2.34 |
| Connetquot Alternative Preschool At Premm | NR | Public | 0 | 2.75 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Sayville High School | 9 | Public | 9-12 | 880 | 0.95 |
| Bayport Blue Point High School | 9 | Public | 9-12 | 664 | 1.40 |
| Connetquot Alternative Preschool At Premm | NR | Public | 0 | 2.75 | |
| Connetquot High School | 8 | Public | 9-12 | 1,757 | 4.87 |
| Eastern Suffolk Boces | NR | Public | K-12 | 1,721 | 5.47 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 River Street, Sayville.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 4299 Express Dr N, Ronkonkoma | 936 | 12/29/2020 | $355,000 |
| 6 Lawrence CT, Bay Shore | 11/15/2006 | $560,000 | |
| 75 Cranberry St, Central Islip | 06/16/2025 | $562,500 | |
| 11 Weldon St, Islip | 03/19/2008 | ||
| 325 Half Mile Rd, Central Islip | 11/15/2006 | $349,800 | |
| 32 Ivy Hill Rd, Oakdale | 06/30/2023 | ||
| 42 Buckingham Dr, Holbrook | 2,496 | 06/17/2016 | |
| 14 Ralph Ave, Brentwood | 01/17/2024 | ||
| 103 Juniper St, Central Islip | 2,038 | 04/15/2016 | $270,000 |
| 46 Woodland St, East Islip | 1,755 | 11/26/2018 | $370,000 |
| 184 Floyd St, Brentwood | 02/11/2022 | ||
| 7 Gianna CT, Hauppauge | 06/28/2011 | $580,000 | |
| 54 Oneill Ave, Bay Shore | 2,684 | 09/10/2025 | $585,000 |
| 201 Cedarwood St, Islip Terrace | 09/01/2020 | $335,000 | |
| 61 Julbet Dr, Sayville | 2,908 | 04/23/2019 | |
| 611 Connetquot Ave, Islip Terrace | 1,389 | 10/17/2025 | |
| 258 Lamoka Pl, West Islip | 11/21/2006 | ||
| 240 Matthews Rd, Oakdale | 10/13/2006 | ||
| 304 Vanderbilt Ave, Brentwood | 09/30/2013 | ||
| 1211 Saxon Ave, Bay Shore | 06/24/2019 |