$750,000
4 Bed • 2 Bath • 1,512 Sq. Ft.4 bd · 2 ba · 1,512 sqft
21 Mallory Road
Spring Valley, NY 10977
Listed with Real Broker NY LLC
$649,999
Est. $4,670/moTappan, NY 10983 · Rockland County
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Set on an extraordinary parcel spanning the length of four neighboring homes, this distinctive multi-level duplex—formerly known in the 1960s and 1970s as the iconic McCarty's Egg Farm—presents a rare opportunity to create an exceptional residence or income-producing investment. Located within the award-winning South Orangetown Central School District, this one-of-a-kind property offers remarkable scale, character, and limitless possibilities. The versatile layout features a walk-out partially finished basement, a detached secondary structure, a wraparound deck, a studio apartment, and a disused pool, creating exceptional flexibility for multi-generational living, rental income, a home office or studio, or future customization. Mature landscaping and expansive outdoor space provide a private setting with ample room to reimagine and enhance. Whether restoring its unique character or transforming it into a modern showpiece, this property offers an uncommon combination of history, size, and potential in one of Rockland County's most sought-after communities. Conveniently located near parks, shopping, dining, major highways, and commuter routes to New York City and New Jersey, this is a truly rare offering for homeowners, investors, and developers alike.
As reported by the listing office; verify enrollment with the district.
Listed with R2M Realty Inc · Dina Wolleben · Source: OneKey MLS
Information provided by One Key MLS, and is deemed reliable but not guaranteed accurate. Data last updated: Nov 3, 2026, 12:07 AM ET. ©2026 One Key MLS.
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Market insights
Current listings
New in the last 30 days
0
Nov 2026
Average price
Active listings
$683,205
Nov 2026
Average days on market
Active listings
107 days
Nov 2026
Computed from 19 active OneKey MLS listings in Tappan, NY.
$750,000
4 Bed • 2 Bath • 1,512 Sq. Ft.4 bd · 2 ba · 1,512 sqft
21 Mallory Road
Spring Valley, NY 10977
Listed with Real Broker NY LLC
$699,000
3 Bed • 1.5 Bath • 1,493 Sq. Ft.3 bd · 1.5 ba · 1,493 sqft
24 Fairview Lane
Orangeburg, NY 10962
Listed with eXp Realty
$625,000
4 Bed • 2.5 Bath • 1,765 Sq. Ft.4 bd · 2.5 ba · 1,765 sqft
786 Sequoia Drive
Valley Cottage, NY 10989
Listed with YourHomeSold Guaranteed Realty