31 Union Ave
Islip, NY 11751
3 bd 2 ba Built 1890 Lot 21,780 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
No timeline data
No sale, listing, or tax history is recorded for this property.
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
No tax assessment data
No assessment history available for this parcel.
Property facts
Year built
1890
Property type
single_family
Stories
—
Beds
3
Baths
2
Living area
—
Lot size
21,780 sqft
ZIP code
11751
City
Islip
Street
Union Ave
Coordinates
40.72833, -73.21307
Frequently asked questions
When did 31 Union Ave last sell?
No public-record sale is on file for 31 Union Ave.
What is the current tax assessment for 31 Union Ave?
No tax-assessment history is recorded for this parcel.
When was 31 Union Ave built?
31 Union Ave was built in 1890.
How does 31 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 31 Union Ave?
31 Union Ave is a 3 bed, 2 bath, 21,780 sqft lot single_family.
Is 31 Union Ave a flip candidate?
No — 31 Union Ave does not appear in our flips dataset.
Is 31 Union Ave a tax-appeal candidate?
No — 31 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
Explore nearby
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