421 Islip Ave
Islip, NY 11751
— ba 2,561 sqft Built 2002 Lot 7,405 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 | $37,200 | $6,700 | $43,900 | $15,173 |
| 2017 | $37,400 | $6,700 | $44,100 | $13,387 |
| 2016 | $37,400 | $6,700 | $44,100 | $13,234 |
| 2015 | $37,400 | $6,700 | $44,100 | $11,990 |
| 2014 | $37,400 | $6,700 | $44,100 | $11,822 |
| 2013 | $37,400 | $6,700 | $44,100 | $11,547 |
| 2012 | $37,400 | $6,700 | $44,100 | $11,177 |
| 2011 | $37,400 | $6,700 | $44,100 | $10,683 |
| 2010 | $37,400 | $6,700 | $44,100 | $10,235 |
| 2008 | $37,400 | $6,700 | $44,100 | $9,761 |
Property facts
Year built
2002
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
2,561 sqft
Lot size
7,405 sqft
ZIP code
11751
City
Islip
Street
Islip Ave
Coordinates
40.74520, -73.20747
Comparable properties nearby
Frequently asked questions
When did 421 Islip Ave last sell?
No public-record sale is on file for 421 Islip Ave.
What is the current tax assessment for 421 Islip Ave?
The most recent total assessment for 421 Islip Ave (year 2025) is $43,900 with $15,173 in property tax.
When was 421 Islip Ave built?
421 Islip Ave was built in 2002.
How does 421 Islip Ave compare to others on Islip Ave?
We track 8 other properties on Islip Ave. Browse the list under "Other properties on Islip Ave" to compare beds, baths, and sale history.
What are the property facts for 421 Islip Ave?
421 Islip Ave is a — bath, 2,561 sqft, 7,405 sqft lot single_family.
Is 421 Islip Ave a flip candidate?
No — 421 Islip Ave does not appear in our flips dataset.
Is 421 Islip Ave a tax-appeal candidate?
No — 421 Islip Ave 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
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