21 River St
Sayville, NY 11782
— ba 3,944 sqft Built 1925 Lot 16,988 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $38,200 | $15,400 | $53,600 | $17,084 |
| 2024 | $38,200 | $15,400 | $53,600 | $15,927 |
| 2023 | $38,200 | $15,400 | $53,600 | $15,927 |
| 2022 | $38,200 | $15,400 | $53,600 | $15,982 |
| 2021 | $35,600 | $15,400 | $51,000 | $13,911 |
| 2020 | $35,600 | $15,400 | $51,000 | $13,507 |
| 2018 | $35,600 | $15,400 | $51,000 | $13,105 |
| 2017 | $35,600 | $15,400 | $51,000 | $12,847 |
| 2016 | $35,600 | $15,400 | $51,000 | $12,825 |
| 2015 | $35,600 | $15,400 | $51,000 | $12,931 |
| 2014 | $31,600 | $15,400 | $47,000 | $12,871 |
| 2013 | $31,600 | $15,400 | $47,000 | $12,507 |
| 2012 | $31,600 | $15,400 | $47,000 | $12,208 |
| 2011 | $31,600 | $15,400 | $47,000 | $11,785 |
| 2010 | $22,600 | $15,400 | $38,000 | $9,102 |
| 2008 | $22,600 | $15,400 | $38,000 | $8,788 |
Property facts
Year built
1925
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
3,944 sqft
Lot size
16,988 sqft
ZIP code
11782
City
Sayville
Street
River St
Coordinates
40.73056, -73.07640
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 River St last sell?
No public-record sale is on file for 21 River St.
What is the current tax assessment for 21 River St?
The most recent total assessment for 21 River St (year 2025) is $53,600 with $17,084 in property tax.
When was 21 River St built?
21 River St was built in 1925.
How does 21 River St compare to others on River St?
We track 2 other properties on River St. Browse the list under "Other properties on River St" to compare beds, baths, and sale history.
What are the property facts for 21 River St?
21 River St is a — bath, 3,944 sqft, 16,988 sqft lot single_family.
Is 21 River St a flip candidate?
No — 21 River St does not appear in our flips dataset.
Is 21 River St a tax-appeal candidate?
No — 21 River St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
-0.3%
Implied 1-yr
-1.1%
2026 Q2
$776K
2026 Q3
$773.7K
ZIP 11782 — Median Price History + Forecast
Explore nearby
Geography
Other properties on River St