20 William St
East Northport, NY 11731
— ba Lot 9,583 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 | $3,320 | $180 | $3,500 | $13,320 |
| 2024 | $3,320 | $180 | $3,500 | $12,265 |
| 2023 | $3,320 | $180 | $3,500 | $5,918 |
| 2022 | $3,320 | $180 | $3,500 | $11,589 |
| 2021 | $3,320 | $180 | $3,500 | $5,626 |
| 2020 | $3,320 | $180 | $3,500 | $11,081 |
| 2018 | $3,320 | $180 | $3,500 | $10,767 |
| 2017 | $4,020 | $180 | $4,200 | $12,490 |
| 2016 | $4,020 | $180 | $4,200 | $12,287 |
| 2015 | $4,020 | $180 | $4,200 | $12,074 |
| 2014 | $4,020 | $180 | $4,200 | $11,840 |
| 2013 | $4,020 | $180 | $4,200 | $11,487 |
| 2012 | $4,020 | $180 | $4,200 | $11,280 |
| 2011 | $4,020 | $180 | $4,200 | $11,073 |
| 2010 | $4,020 | $180 | $4,200 | $10,737 |
| 2008 | $4,020 | $180 | $4,200 | $10,369 |
| 2007 | $4,020 | $180 | $4,200 | $9,808 |
| 2006 | $4,020 | $180 | $4,200 | $9,638 |
Property facts
Year built
—
Property type
multi_family
Stories
—
Beds
—
Baths
—
Living area
—
Lot size
9,583 sqft
ZIP code
11731
City
East Northport
Street
William St
Coordinates
40.87261, -73.34036
Frequently asked questions
When did 20 William St last sell?
No public-record sale is on file for 20 William St.
What is the current tax assessment for 20 William St?
The most recent total assessment for 20 William St (year 2025) is $3,500 with $13,320 in property tax.
When was 20 William St built?
The year built for 20 William St is not in our records.
How does 20 William St compare to others on William St?
We do not currently track other properties on William St.
What are the property facts for 20 William St?
20 William St is a — bath, 9,583 sqft lot multi_family.
Is 20 William St a flip candidate?
No — 20 William St does not appear in our flips dataset.
Is 20 William St a tax-appeal candidate?
No — 20 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
+1.1%
Implied 1-yr
+4.2%
2026 Q3
$841.8K
2026 Q4
$850K
ZIP 11731 — Median Price History + Forecast
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