21 William Ave
Glen Head, NY 11545
5 bd 3 ba Built 1954 Lot 8,960 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 |
|---|---|---|---|---|
| 2024 | $466 | $263 | $729 | $2,650 |
| 2022 | $466 | $263 | $729 | $2,817 |
| 2021 | $466 | $263 | $729 | $9,841 |
| 2020 | $462 | $261 | $723 | $6,245 |
| 2019 | $684 | $739 | $1,423 | $7,137 |
| 2018 | $684 | $739 | $1,423 | $6,625 |
| 2016 | $684 | $739 | $1,423 | $7,761 |
| 2015 | $684 | $739 | $1,423 | $12,164 |
| 2014 | $684 | $739 | $1,423 | $12,499 |
| 2013 | $768 | $739 | $1,507 | $11,723 |
| 2011 | $768 | $739 | $1,507 | $10,491 |
| 2010 | $813 | $739 | $1,552 | $10,506 |
| 2009 | $989 | $739 | $1,728 | $9,928 |
| 2007 | $892 | $739 | $1,631 | $9,096 |
Property facts
Year built
1954
Property type
single_family
Stories
—
Beds
5
Baths
3
Living area
—
Lot size
8,960 sqft
ZIP code
11545
City
Glen Head
Street
William Ave
Coordinates
40.83503, -73.62923
Frequently asked questions
When did 21 William Ave last sell?
No public-record sale is on file for 21 William Ave.
What is the current tax assessment for 21 William Ave?
The most recent total assessment for 21 William Ave (year 2024) is $729 with $2,650 in property tax.
When was 21 William Ave built?
21 William Ave was built in 1954.
How does 21 William Ave compare to others on William Ave?
We do not currently track other properties on William Ave.
What are the property facts for 21 William Ave?
21 William Ave is a 5 bed, 3 bath, 8,960 sqft lot single_family.
Is 21 William Ave a flip candidate?
No — 21 William Ave does not appear in our flips dataset.
Is 21 William Ave a tax-appeal candidate?
No — 21 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
-2.5%
Implied 1-yr
-9.9%
2026 Q2
$2.14M
2026 Q3
$2.08M
ZIP 11545 — Median Price History + Forecast
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