20 Union St
Sag Harbor, NY 11963
5 bd 4 ba 4,688 sqft Built 1995 Lot 14,810 sqft single_family
Most recent sale
$3,500,000
Feb 14, 2014
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Nov 21, 2025 | Sold | $118,000 | Public Record |
| Jan 17, 2024 | Listed for rent | $450,000 | CorcoranGroup |
| Nov 15, 2023 | Listed for rent | $450,000 | CorcoranGroup |
| Oct 24, 2023 | Listed for rent | $450,000 | CorcoranGroup |
| Sep 24, 2022 | Relisted | $13,495,000 | MLS #82ef571a-5d24-49e8-be4a-c28d1760bf96 |
| May 24, 2022 | Listed | $13,495,000 | MLS #82ef571a-5d24-49e8-be4a-c28d1760bf96 |
| Mar 3, 2022 | Price changed for rent | $100,000 | CorcoranGroup |
| Nov 2, 2021 | Relisted | $13,495,000 | MLS #5621671 |
| Nov 2, 2021 | Listed for rent | $175,000 | CorcoranGroup |
| Sep 21, 2021 | Price changed | $13,495,000 | MLS #H109514 |
| Sep 20, 2021 | Price changed | $13,495,000 | MLS #5621671 |
| Sep 17, 2021 | Price changed for rent | $175,000 | CorcoranGroup |
| Sep 16, 2021 | Price changed for rent | $3,600,000 | CorcoranGroup |
| Jul 31, 2021 | Price changed for rent | $175,000 | CorcoranGroup |
| Jun 29, 2021 | Listed for rent | $450,000 | CorcoranGroup |
| Jun 21, 2021 | Price changed | $13,800,000 | MLS #H109514 |
| Sep 29, 2020 | Relisted | $14,000,000 | MLS #5621671 |
| Sep 23, 2020 | Relisted | $14,000,000 | MLS #H109514 |
| May 16, 2020 | Price changed for rent | $29,166 | DouglasElliman |
| May 5, 2020 | Price changed for rent | $29,167 | DouglasElliman |
| Apr 8, 2020 | Price changed for rent | $25,000 | DouglasElliman |
| Feb 20, 2020 | Price changed | $14,000,000 | MLS #5621671 |
| Jan 17, 2020 | Price changed for rent | $300,000 | DouglasElliman |
| Sep 20, 2019 | Listed for rent | $400,000 | DouglasElliman |
| Apr 10, 2019 | Listed | $13,500,000 | MLS #H109514 |
| Apr 9, 2019 | Listing removed | $225,000 | DouglasElliman |
| Apr 3, 2019 | Listed | $13,500,000 | MLS #5621671 |
| Nov 5, 2018 | Price changed for rent | $225,000 | DouglasElliman |
| Oct 24, 2018 | Price changed for rent | $350,000 | DouglasElliman |
| Oct 17, 2018 | Listed for rent | $480,000 | DouglasElliman |
| Nov 1, 2017 | Listing removed | $14,200,000 | CorcoranGroup |
| Oct 23, 2017 | Listing removed | $14,200,000 | DouglasElliman |
| Feb 6, 2017 | Relisted | $14,200,000 | MLS #H33799 |
| Feb 3, 2017 | Listing removed | $14,200,000 | DouglasElliman |
| Aug 9, 2016 | Listed | $14,200,000 | MLS #3717374 |
| Aug 2, 2016 | Listed | $14,200,000 | MLS #H33799 |
| Mar 3, 2016 | Listing removed | $65,000 | Sothebys International Realty |
| Oct 7, 2015 | Listed for rent | $65,000 | Sothebys International Realty |
| Feb 14, 2014 | Sold | $3,500,000 | MLS #114211 |
| Aug 1, 2013 | Listed | $3,900,000 | MLS #114211 |
| Jun 29, 1989 | Sold | $765,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $8,482,400 | $1,191,700 | $9,674,100 | $13,435 |
| 2024 | $8,482,400 | $1,191,700 | $9,674,100 | $26,870 |
| 2023 | $8,492,800 | $1,191,700 | $9,684,500 | $26,633 |
| 2022 | $8,492,800 | $1,191,700 | $9,684,500 | $79,173 |
| 2021 | $8,492,800 | $1,191,700 | $9,684,500 | $78,431 |
| 2020 | $8,492,800 | $1,191,700 | $9,684,500 | $51,898 |
| 2019 | $8,492,800 | $1,191,700 | $9,684,500 | $76,971 |
| 2018 | $4,498,400 | $953,400 | $5,451,800 | $31,321 |
| 2017 | $4,498,400 | $953,400 | $5,451,800 | $31,322 |
| 2016 | $4,500,000 | $953,400 | $5,453,400 | $32,585 |
| 2015 | $705,200 | $953,400 | $1,658,600 | $10,156 |
| 2014 | $420,300 | $953,400 | $1,373,700 | $8,690 |
| 2013 | $420,300 | $953,400 | $1,373,700 | $8,702 |
| 2012 | $420,300 | $953,400 | $1,373,700 | $8,496 |
| 2011 | $420,300 | $953,400 | $1,373,700 | $8,187 |
| 2010 | $420,300 | $953,400 | $1,373,700 | $7,876 |
| 2009 | $420,300 | $953,400 | $1,373,700 | $6,744 |
| 2008 | $420,300 | $953,400 | $1,373,700 | $6,743 |
| 2007 | $420,300 | $953,400 | $1,373,700 | $6,935 |
| 2006 | $420,300 | $1,588,900 | $2,009,200 | $6,977 |
Property facts
Year built
1995
Property type
single_family
Stories
2
Beds
5
Baths
4
Living area
4,688 sqft
Lot size
14,810 sqft
ZIP code
11963
City
Sag Harbor
Street
Union St
Coordinates
40.99740, -72.29528
Comparable properties nearby
Frequently asked questions
When did 20 Union St last sell?
20 Union St most recently sold on Feb 14, 2014 for $3,500,000.
What is the current tax assessment for 20 Union St?
The most recent total assessment for 20 Union St (year 2025) is $9,674,100 with $13,435 in property tax.
How does 20 Union St's assessment compare to its last sale price?
The current assessment is 176.4% above the last sale price of $3,500,000.
When was 20 Union St built?
20 Union St was built in 1995.
How does 20 Union St compare to others on Union St?
We track 4 other properties on Union St. Browse the list under "Other properties on Union St" to compare beds, baths, and sale history.
What are the property facts for 20 Union St?
20 Union St is a 5 bed, 4 bath, 4,688 sqft, 14,810 sqft lot single_family.
Is 20 Union St a flip candidate?
No — 20 Union St does not appear in our flips dataset.
Is 20 Union St a tax-appeal candidate?
Yes — 20 Union St appears in our tax-appeal candidates list, meaning its current assessment exceeds its recent sale price by 15% or more.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+1.2%
Implied 1-yr
+4.9%
2026 Q2
$3.7M
2026 Q3
$3.74M
ZIP 11963 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St