644 Main St
Port Jefferson, NY 11777
— ba 3,860 sqft Built 1980 Lot 6,970 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 | $4,550 | $350 | $4,900 | $17,619 |
| 2024 | $4,550 | $350 | $4,900 | $16,135 |
| 2023 | $4,550 | $350 | $4,900 | $15,371 |
| 2022 | $4,550 | $350 | $4,900 | $14,595 |
| 2021 | $4,550 | $350 | $4,900 | $14,229 |
| 2020 | $4,550 | $350 | $4,900 | $13,848 |
| 2018 | $4,550 | $350 | $4,900 | $11,553 |
| 2017 | $5,850 | $350 | $6,200 | $29,264 |
| 2010 | $5,850 | $350 | $6,200 | $12,214 |
| 2008 | $5,850 | $350 | $6,200 | $11,423 |
| 2007 | $5,850 | $350 | $6,200 | $11,215 |
| 2006 | $5,850 | $350 | $6,200 | $11,005 |
Property facts
Year built
1980
Property type
multi_family
Stories
—
Beds
—
Baths
—
Living area
3,860 sqft
Lot size
6,970 sqft
ZIP code
11777
City
Port Jefferson
Street
Main St
Coordinates
40.94033, -73.06327
Comparable properties nearby
Frequently asked questions
When did 644 Main St last sell?
No public-record sale is on file for 644 Main St.
What is the current tax assessment for 644 Main St?
The most recent total assessment for 644 Main St (year 2025) is $4,900 with $17,619 in property tax.
When was 644 Main St built?
644 Main St was built in 1980.
How does 644 Main St compare to others on Main St?
We track 8 other properties on Main St. Browse the list under "Other properties on Main St" to compare beds, baths, and sale history.
What are the property facts for 644 Main St?
644 Main St is a — bath, 3,860 sqft, 6,970 sqft lot multi_family.
Is 644 Main St a flip candidate?
No — 644 Main St does not appear in our flips dataset.
Is 644 Main St a tax-appeal candidate?
No — 644 Main 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
+1.6%
Implied 1-yr
+6.4%
2026 Q1
$880.9K
2026 Q2
$893.6K
ZIP 11777 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Main St