21 Windsor St
Islip, NY 11751
— ba 1,000 sqft Built 1958 Lot 8,276 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 | $26,850 | $7,100 | $33,950 | $12,089 |
| 2024 | $26,850 | $7,100 | $33,950 | $11,273 |
| 2023 | $26,850 | $7,100 | $33,950 | $11,273 |
| 2022 | $26,850 | $7,100 | $33,950 | $11,460 |
| 2021 | $26,850 | $7,100 | $33,950 | $11,077 |
| 2020 | $26,850 | $7,100 | $33,950 | $10,792 |
| 2018 | $26,850 | $7,100 | $33,950 | $10,497 |
| 2017 | $26,850 | $7,100 | $33,950 | $7,887 |
| 2016 | $26,850 | $7,100 | $33,950 | $7,829 |
| 2015 | $26,850 | $7,100 | $33,950 | $7,873 |
| 2014 | $26,850 | $7,100 | $33,950 | $7,758 |
| 2013 | $26,850 | $7,100 | $33,950 | $8,679 |
| 2012 | $26,850 | $7,100 | $33,950 | $8,355 |
| 2011 | $26,850 | $7,100 | $33,950 | $8,037 |
| 2010 | $26,850 | $7,100 | $33,950 | $7,692 |
| 2008 | $26,850 | $7,100 | $33,950 | $7,250 |
Property facts
Year built
1958
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
1,000 sqft
Lot size
8,276 sqft
ZIP code
11751
City
Islip
Street
Windsor St
Coordinates
40.74805, -73.22508
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 Windsor St last sell?
No public-record sale is on file for 21 Windsor St.
What is the current tax assessment for 21 Windsor St?
The most recent total assessment for 21 Windsor St (year 2025) is $33,950 with $12,089 in property tax.
When was 21 Windsor St built?
21 Windsor St was built in 1958.
How does 21 Windsor St compare to others on Windsor St?
We track 8 other properties on Windsor St. Browse the list under "Other properties on Windsor St" to compare beds, baths, and sale history.
What are the property facts for 21 Windsor St?
21 Windsor St is a — bath, 1,000 sqft, 8,276 sqft lot single_family.
Is 21 Windsor St a flip candidate?
No — 21 Windsor St does not appear in our flips dataset.
Is 21 Windsor St a tax-appeal candidate?
No — 21 Windsor 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
-13.7%
Implied 1-yr
-54.6%
2026 Q1
$212.6K
2026 Q2
$212.6K
ZIP 11751 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Windsor St