447 Prospect Ave
Central Islip, NY 11722
— ba 814 sqft Built 1929 Lot 19,602 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 | $21,800 | $10,200 | $32,000 | $10,633 |
| 2024 | $21,800 | $10,200 | $32,000 | $10,188 |
| 2023 | $21,800 | $10,200 | $32,000 | $10,188 |
| 2022 | $21,800 | $10,200 | $32,000 | $10,061 |
| 2021 | $21,800 | $10,200 | $32,000 | $9,939 |
| 2020 | $21,800 | $10,200 | $32,000 | $9,935 |
| 2018 | $21,800 | $10,200 | $32,000 | $9,774 |
| 2017 | $38,800 | $10,200 | $49,000 | $22,571 |
| 2016 | $38,800 | $10,200 | $49,000 | $14,974 |
| 2015 | $38,800 | $10,200 | $49,000 | $14,881 |
| 2014 | $38,800 | $10,200 | $49,000 | $14,791 |
| 2013 | $19,700 | $10,200 | $29,900 | $7,468 |
| 2012 | $19,700 | $10,200 | $29,900 | $7,374 |
| 2011 | $19,700 | $10,200 | $29,900 | $7,113 |
| 2010 | $19,700 | $10,200 | $29,900 | $6,854 |
| 2008 | $19,700 | $10,200 | $29,900 | $6,326 |
| 2007 | $19,700 | $10,200 | $29,900 | $5,978 |
Property facts
Year built
1929
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
814 sqft
Lot size
19,602 sqft
ZIP code
11722
City
Central Islip
Street
Prospect Ave
Coordinates
40.79428, -73.22302
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 447 Prospect Ave last sell?
No public-record sale is on file for 447 Prospect Ave.
What is the current tax assessment for 447 Prospect Ave?
The most recent total assessment for 447 Prospect Ave (year 2025) is $32,000 with $10,633 in property tax.
When was 447 Prospect Ave built?
447 Prospect Ave was built in 1929.
How does 447 Prospect Ave compare to others on Prospect Ave?
We track 3 other properties on Prospect Ave. Browse the list under "Other properties on Prospect Ave" to compare beds, baths, and sale history.
What are the property facts for 447 Prospect Ave?
447 Prospect Ave is a — bath, 814 sqft, 19,602 sqft lot single_family.
Is 447 Prospect Ave a flip candidate?
No — 447 Prospect Ave does not appear in our flips dataset.
Is 447 Prospect Ave a tax-appeal candidate?
No — 447 Prospect 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 Prospect Ave