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$5,500,000
5 Days On Site

310 Mount Holly Road A
Katonah, NY10536

For Sale|Single Family Residence|Active
7
Beds
6
Total Baths
4
Full Baths
2
Partial Baths
6,900
SqFt
$797
/SqFt
2026
Built
County:
Westchester
Listing courtesy of Serhant LLC [email protected]

Due to the health concerns created by Coronavirus we are offering personal 1-1 online video walkthough tours where possible.

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845-492-0319
Upcoming Open Houses
Due to COVID-19, we recommend you verify Open Houses before attending.
Sat, Apr 4, 12:00 PM - 2:00 PM
310 Mount Holly Road A310 Mount Holly Road A310 Mount Holly Road A310 Mount Holly Road A
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Mortgage Calculator

Monthly Payment (Est.)

$25,093
Calculator powered by Showcase IDX, a Constellation1 Company. Copyright ©2026 Information is deemed reliable but not guaranteed.

Bellwether Farm - A Rare Compound Opportunity in the Heart of Bedford Horse Country. Bellwether Farm presents a singular opportunity to create a fully bespoke country estate on Mt. Holly Road, one of Northern Westchester's most coveted addresses in the heart of Bedford-Katonah horse country. Approached along an idyllic country road, the property arrives like a page out of time: four pastoral acres of open meadow, structures that trace their roots to the early 19th century, and the unhurried feeling of a European farmstead - all just an hour from NYC. Bellwether Farm offers something vanishingly rare - the ability to build a primary residence entirely to your own vision, on land already home to a remarkable collection of historic structures. Architectural plans exist for a modern farmhouse of approx. 3,600 sq ft (plus unfinished lower level), featuring dramatic vaulted ceilings, a full wall of glass opening to sweeping meadow views, and clean proportions that sit comfortably within the landscape. The design envisions four bedrooms and three baths, as reflected in the renderings. A seven-bedroom septic is approved and construction drawings are in hand, providing a clear path toward completion. The property's architect and builder are available to collaborate, or a buyer may engage their own design and team. What distinguishes Bellwether Farm is a grandfathered multi-structure configuration no longer achievable under current Bedford zoning. The result is a thoughtfully composed compound comprising approx. 3,300 sq ft across three buildings - the Barn, Carriage House, and Milk House - offering rare flexibility for living, hosting, and creative work that a single-structure residence simply cannot. The Barn, featuring historic details like wavy glass diamond-paned windows and classic barn doors, includes a stylish two-bedroom apartment above and unfinished studio below, suited as a wellness space, creative studio, or lounge. Ready to occupy from day one, the apartment is an ideal base while overseeing construction. The Carriage House, with hand-hewn beams, antique brick floors, and new large-scale commercial glass, awaits final transformation as home office, creative studio, or guest cottage, with living and kitchenette on the main floor and lofted sleeping quarters above. Completion plans for both are approved by the Town of Bedford. The charming Milk House sits quietly apart - perfect for a writer's studio or garden retreat. Once a thriving working farm, the land remains essentially untouched - open pasture, long meadow views, and historic stone walls that speak to generations of quiet, unhurried life. Mature plantings frame an effortless setting for entertaining, future gardens, and pool placement. A gravel motor court lends a graceful arrival that feels entirely of the place. Bellwether Farm is a rare chance to build something entirely your own - a country estate with room for guests, and creativity, each in its own dedicated setting, in one of the Hudson Valley's most beautiful and sought-after enclaves. Renderings shown. Details available upon request.

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Listing Snapshot
Price 
$5,500,000
Days On Site 
5 Days
Bedrooms 
7
Inside Area (SqFt) 
6,900 sqft
Total Baths 
6
Full Baths 
4
Partial Baths 
2
Lot Size 
4 Acres
Year Built 
2026
MLS® Number 
976632
Status 
Active
Property Tax 
$24,668.39
HOA/Condo/Coop Fees 
N/A
Sq Ft Source 
N/A
Friends & Family
Recent Activity
5 days agoListing first seen on site
5 days agoListing updated with changes from the MLS®
General Features
Acres 
4
Attached Garage 
Yes
Garage 
Yes
Garage Spaces 
5
Parking 
AttachedDrivewayGaragePrivate
Property Condition 
New Construction
Property Sub Type 
Single Family Residence
Sewer 
Septic Tank
Style 
Carriage HouseEstateFarmhouseModernRanch
Utilities 
Electricity ConnectedPropaneSee Remarks
Water Source 
PrivateWell
Interior Features
Appliances 
Convection OvenDishwasherDryerGas OvenGas RangeMicrowaveOvenRefrigeratorStainless Steel Appliance(s)Washer
Basement 
Storage SpaceUnfinishedWalk-Out Access
Cooling 
Central AirDuctlessElectric
Fireplace 
Yes
Heating 
Forced AirHeat PumpPropane
Interior 
Breakfast BarBuilt-in FeaturesCathedral Ceiling(s)Eat-in KitchenEntrance FoyerHigh CeilingsHis and Hers ClosetsKitchen IslandNatural WoodworkOpen FloorplanRecessed LightingWalk-In Closet(s)
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Exterior Features
Construction Details 
FrameShake Siding
Other Structures 
Barn(s)Garage(s)Guest HouseResidenceShed(s)Workshop
Community Features
Horse Allowed 
Yes
School District 
Katonah-Lewisboro
Schools
School District
Katonah-Lewisboro
Elementary School
Increase Miller Elementary School
Middle School
John Jay Middle School
High School
John Jay High School
Listing courtesy of Serhant LLC [email protected]


Based on information submitted to the MLS GRID as of 2026-03-31 04:25 AM EDT. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

Neighborhood & Commute
Source: Walkscore
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