66 William Ave
Central Islip, NY 11722
— ba 1,821 sqft Built 1957 Lot 8,712 sqft multi_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 | $28,850 | $6,700 | $35,550 | $12,029 |
| 2024 | $28,850 | $6,700 | $35,550 | $11,534 |
| 2023 | $28,850 | $6,700 | $35,550 | $11,534 |
| 2022 | $28,850 | $6,700 | $35,550 | $11,410 |
| 2021 | $28,850 | $6,700 | $35,550 | $11,256 |
| 2020 | $28,850 | $6,700 | $35,550 | $11,224 |
| 2018 | $28,850 | $6,700 | $35,550 | $11,064 |
| 2017 | $28,850 | $6,700 | $35,550 | $10,977 |
| 2016 | $28,850 | $6,700 | $35,550 | $10,889 |
| 2015 | $28,850 | $6,700 | $35,550 | $10,822 |
| 2014 | $28,850 | $6,700 | $35,550 | $10,756 |
| 2013 | $28,850 | $6,700 | $35,550 | $10,644 |
| 2012 | $28,850 | $6,700 | $35,550 | $10,500 |
| 2011 | $28,850 | $6,700 | $35,550 | $8,867 |
| 2010 | $28,850 | $6,700 | $35,550 | $8,552 |
| 2008 | $28,850 | $6,700 | $35,550 | $13,338 |
| 2007 | $28,850 | $6,700 | $35,550 | $2,619 |
Property facts
Year built
1957
Property type
multi_family
Stories
—
Beds
—
Baths
—
Living area
1,821 sqft
Lot size
8,712 sqft
ZIP code
11722
City
Central Islip
Street
William Ave
Coordinates
40.79554, -73.19636
Comparable properties nearby
Frequently asked questions
When did 66 William Ave last sell?
No public-record sale is on file for 66 William Ave.
What is the current tax assessment for 66 William Ave?
The most recent total assessment for 66 William Ave (year 2025) is $35,550 with $12,029 in property tax.
When was 66 William Ave built?
66 William Ave was built in 1957.
How does 66 William Ave compare to others on William Ave?
We track 4 other properties on William Ave. Browse the list under "Other properties on William Ave" to compare beds, baths, and sale history.
What are the property facts for 66 William Ave?
66 William Ave is a — bath, 1,821 sqft, 8,712 sqft lot multi_family.
Is 66 William Ave a flip candidate?
No — 66 William Ave does not appear in our flips dataset.
Is 66 William Ave a tax-appeal candidate?
No — 66 William 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
-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 Ave