20 Old Knollwood Road Ext
Elmsford, NY 10523
Built 1920 single_family
Most recent sale
$430,000
Mar 2, 1998
Location
Timeline: Sale, Listing & Tax History
Recorded events
| Date | Event | Price | Source |
|---|---|---|---|
| Jan 10, 2025 | Listing removed | $1,270,000 | OneKeyMLS |
| Dec 30, 2024 | Sold | $1,300,000 | Public Record |
| Oct 15, 2024 | Sold | $1,300,000 | OneKeyMLS |
| Sep 4, 2024 | Relisted | $1,200,000 | OneKeyMLS |
| Aug 11, 2024 | Listing removed | $1,200,000 | OneKeyMLS |
| Jul 15, 2024 | Listed | $1,200,000 | OneKeyMLS |
| Jul 7, 2024 | Listing removed | $1,270,000 | OneKeyMLS |
| Jun 17, 2024 | Price changed | $1,270,000 | OneKeyMLS |
| May 18, 2024 | Price changed | $1,225,000 | OneKeyMLS |
| Apr 28, 2024 | Price changed | $1,249,900 | OneKeyMLS |
| Apr 4, 2024 | Listed | $1,299,000 | OneKeyMLS |
| Mar 16, 2024 | Listing removed | $1,325,000 | OneKeyMLS |
| Feb 9, 2024 | Price changed | $1,325,000 | OneKeyMLS |
| Jan 15, 2024 | Listed | $1,350,000 | OneKeyMLS |
| Mar 2, 2023 | Sold | $679,650 | OneKeyMLS |
| Oct 20, 2022 | Relisted | $909,000 | MLS #H6199875 |
| Sep 21, 2022 | Price changed | $880,000 | MLS #H6199875 |
| Aug 11, 2022 | Price changed | $900,000 | MLS #H6199875 |
| Jul 19, 2022 | Listed | $918,000 | MLS #H6199875 |
| Mar 2, 1998 | Sold | $430,000 | Public Record |
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $1,084,300 | $191,200 | $1,275,500 | $27,601 |
| 2024 | $788,800 | $191,200 | $980,000 | $38,247 |
| 2023 | $1,111,300 | $191,200 | $1,302,500 | $38,014 |
| 2022 | $1,060,700 | $191,200 | $1,251,900 | $36,463 |
| 2021 | $829,200 | $182,000 | $1,011,200 | $30,116 |
| 2020 | $829,200 | $182,000 | $1,011,200 | $30,088 |
| 2018 | $829,200 | $182,000 | $1,011,200 | $31,292 |
| 2017 | $791,400 | $182,000 | $973,400 | $20,132 |
| 2016 | $22,700 | $3,000 | $25,700 | $23,994 |
| 2015 | $22,700 | $3,000 | $25,700 | $22,834 |
| 2014 | $22,700 | $3,000 | $25,700 | $22,228 |
| 2013 | $22,700 | $3,000 | $25,700 | $21,410 |
| 2012 | $22,700 | $3,000 | $25,700 | $20,554 |
| 2011 | $22,700 | $3,000 | $25,700 | $19,597 |
| 2009 | $22,700 | $3,000 | $25,700 | $18,627 |
| 2008 | $22,700 | $3,000 | $25,700 | $15,440 |
| 2007 | $22,700 | $3,000 | $25,700 | $14,800 |
Property facts
Year built
1920
Property type
single_family
Stories
—
Beds
—
Baths
—
Living area
—
Lot size
—
ZIP code
10523
City
Elmsford
Street
Old Knollwood Road Ext
Coordinates
41.05349, -73.80739
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 20 Old Knollwood Road Ext last sell?
20 Old Knollwood Road Ext most recently sold on Mar 2, 1998 for $430,000.
What is the current tax assessment for 20 Old Knollwood Road Ext?
The most recent total assessment for 20 Old Knollwood Road Ext (year 2025) is $1,275,500 with $27,601 in property tax.
How does 20 Old Knollwood Road Ext's assessment compare to its last sale price?
The current assessment is 196.6% above the last sale price of $430,000.
When was 20 Old Knollwood Road Ext built?
20 Old Knollwood Road Ext was built in 1920.
How does 20 Old Knollwood Road Ext compare to others on Old Knollwood Road Ext?
We track 3 other properties on Old Knollwood Road Ext. Browse the list under "Other properties on Old Knollwood Road Ext" to compare beds, baths, and sale history.
What are the property facts for 20 Old Knollwood Road Ext?
Detailed property facts are not on file for 20 Old Knollwood Road Ext.
Is 20 Old Knollwood Road Ext a flip candidate?
Yes — 20 Old Knollwood Road Ext appears in our flips dataset, indicating it sold twice within a short window with a notable price change.
Is 20 Old Knollwood Road Ext a tax-appeal candidate?
No — 20 Old Knollwood Road Ext is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+1.5%
Implied 1-yr
+6.0%
2026 Q2
$705.2K
2026 Q3
$714.8K
ZIP 10523 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Old Knollwood Road Ext