117 Union Ave
Islip, NY 11751
3 bd 3 ba 2,415 sqft Built 1877 Lot 14,810 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 | $29,900 | $13,100 | $43,000 | $14,889 |
| 2017 | $29,900 | $13,100 | $43,000 | $12,868 |
| 2016 | $25,850 | $13,100 | $38,950 | $11,762 |
| 2015 | $25,850 | $13,100 | $38,950 | $11,756 |
| 2014 | $25,850 | $13,100 | $38,950 | $11,568 |
| 2013 | $25,850 | $13,100 | $38,950 | $11,294 |
| 2012 | $25,850 | $13,100 | $38,950 | $10,892 |
| 2011 | $25,850 | $13,100 | $38,950 | $10,500 |
| 2010 | $25,850 | $13,100 | $38,950 | $10,077 |
| 2008 | $25,850 | $13,100 | $38,950 | $9,461 |
Property facts
Year built
1877
Property type
single_family
Stories
—
Beds
3
Baths
3
Living area
2,415 sqft
Lot size
14,810 sqft
ZIP code
11751
City
Islip
Street
Union Ave
Coordinates
40.72543, -73.21211
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 117 Union Ave last sell?
No public-record sale is on file for 117 Union Ave.
What is the current tax assessment for 117 Union Ave?
The most recent total assessment for 117 Union Ave (year 2025) is $43,000 with $14,889 in property tax.
When was 117 Union Ave built?
117 Union Ave was built in 1877.
How does 117 Union Ave compare to others on Union Ave?
We track 8 other properties on Union Ave. Browse the list under "Other properties on Union Ave" to compare beds, baths, and sale history.
What are the property facts for 117 Union Ave?
117 Union Ave is a 3 bed, 3 bath, 2,415 sqft, 14,810 sqft lot single_family.
Is 117 Union Ave a flip candidate?
No — 117 Union Ave does not appear in our flips dataset.
Is 117 Union Ave a tax-appeal candidate?
No — 117 Union 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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