23 William St
Central Islip, NY 11722
— ba 928 sqft Built 1962 Lot 10,890 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 | $17,800 | $7,000 | $24,800 | $8,366 |
| 2017 | $17,800 | $7,000 | $24,800 | $7,633 |
| 2016 | $17,800 | $7,000 | $24,800 | $7,572 |
| 2015 | $17,800 | $7,000 | $24,800 | $7,525 |
| 2014 | $17,800 | $7,000 | $24,800 | $7,480 |
| 2013 | $17,800 | $7,000 | $24,800 | $7,400 |
| 2012 | $20,500 | $7,000 | $27,500 | $8,036 |
| 2011 | $20,500 | $7,000 | $27,500 | $7,772 |
| 2010 | $22,000 | $7,000 | $29,000 | $7,890 |
| 2008 | $22,000 | $7,000 | $29,000 | $7,246 |
| 2007 | $22,000 | $7,000 | $29,000 | $6,997 |
Property facts
Year built
1962
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
928 sqft
Lot size
10,890 sqft
ZIP code
11722
City
Central Islip
Street
William St
Coordinates
40.79453, -73.19467
Comparable properties nearby
Frequently asked questions
When did 23 William St last sell?
No public-record sale is on file for 23 William St.
What is the current tax assessment for 23 William St?
The most recent total assessment for 23 William St (year 2025) is $24,800 with $8,366 in property tax.
When was 23 William St built?
23 William St was built in 1962.
How does 23 William St compare to others on William St?
We track 3 other properties on William St. Browse the list under "Other properties on William St" to compare beds, baths, and sale history.
What are the property facts for 23 William St?
23 William St is a — bath, 928 sqft, 10,890 sqft lot single_family.
Is 23 William St a flip candidate?
No — 23 William St does not appear in our flips dataset.
Is 23 William St a tax-appeal candidate?
No — 23 William 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
-2.9%
Implied 1-yr
-11.7%
2026 Q1
$467.5K
2026 Q2
$450.6K
ZIP 11722 — Median Price History + Forecast
Explore nearby
Geography
Other properties on William St