21 Washington St
East Islip, NY 11730
— ba 931 sqft Built 1925 Lot 6,534 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Oct 30, 2024 | Sold | $339,000 | OneKeyMLS |
| Dec 20, 2021 | Sold | $380,000 | Public Record |
| Apr 20, 2017 | Sold | $255,000 | OneKeyMLS |
| Feb 12, 2017 | Price changed | $275,000 | OneKeyMLS |
| Nov 2, 2016 | Listed | $289,000 | OneKeyMLS |
| Jun 6, 2002 | Sold | $200,000 | Public Record |
| Aug 1, 1996 | Sold | $99,500 | Public Record |
| Jun 21, 1996 | Sold | $62,500 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $16,500 | $5,900 | $22,400 | $7,117 |
| 2024 | $16,500 | $5,900 | $22,400 | $6,895 |
| 2023 | $16,500 | $5,900 | $22,400 | $6,895 |
| 2022 | $16,500 | $5,900 | $22,400 | $6,971 |
| 2021 | $16,500 | $5,900 | $22,400 | $6,781 |
| 2020 | $16,500 | $5,900 | $22,400 | $6,724 |
| 2018 | $16,500 | $5,900 | $22,400 | $6,700 |
| 2017 | $16,500 | $5,900 | $22,400 | $5,473 |
| 2016 | $16,500 | $5,900 | $22,400 | $5,517 |
| 2015 | $16,500 | $5,900 | $22,400 | $5,654 |
| 2014 | $16,500 | $5,900 | $22,400 | $5,707 |
| 2013 | $16,500 | $5,900 | $22,400 | $5,646 |
| 2012 | $16,500 | $5,900 | $22,400 | $5,429 |
| 2011 | $16,500 | $5,900 | $22,400 | $5,231 |
| 2010 | $16,500 | $5,900 | $22,400 | $4,912 |
| 2008 | $16,500 | $5,900 | $22,400 | $4,783 |
Property facts
Year built
1925
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
931 sqft
Lot size
6,534 sqft
ZIP code
11730
City
East Islip
Street
Washington St
Coordinates
40.73825, -73.18862
Comparable properties nearby
Frequently asked questions
When did 21 Washington St last sell?
No public-record sale is on file for 21 Washington St.
What is the current tax assessment for 21 Washington St?
The most recent total assessment for 21 Washington St (year 2025) is $22,400 with $7,117 in property tax.
When was 21 Washington St built?
21 Washington St was built in 1925.
How does 21 Washington St compare to others on Washington St?
We track 5 other properties on Washington St. Browse the list under "Other properties on Washington St" to compare beds, baths, and sale history.
What are the property facts for 21 Washington St?
21 Washington St is a — bath, 931 sqft, 6,534 sqft lot single_family.
Is 21 Washington St a flip candidate?
No — 21 Washington St does not appear in our flips dataset.
Is 21 Washington St a tax-appeal candidate?
No — 21 Washington 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
+2.1%
Implied 1-yr
+8.4%
2026 Q3
$806.5K
2026 Q4
$821.5K
ZIP 11730 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Washington St