310 Mt Holly Road
Katonah, NY, 10536 $ 5,500,000
Bedrooms7 Baths4.2 Sq 6,900 Monthly Estimate*
$ 33,864
for $5,500,000 with 7 bedrooms and 4 full baths, 2 half baths. This 6,900 square foot home was built in 1850 on a lot size of 4.
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 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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Single Family ActiveCarriage House,Estate,Farmhouse,Modern,Ranch
FeaturesInteriorInterior Amenities First Floor Bedroom First Floor Full Bath Breakfast Bar Built-in Features Cathedral Ceiling(s) Eat-in Kitchen Entrance Foyer Formal Dining High Ceilings His and Hers Closets Kitchen Island Natural Wo
Basement Storage Space Unfinished Walk-Out Access
Basement Features Storage Space Unfinished Walk-Out Access
Basement (Y/N) Y
Fireplace Y/N Y
Half Baths 2
Total Bedrooms 7
Total Baths 6
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GeneralSewer Septic Tank
Heating Forced Air Heat Pump Propane
Cooling Central Air Ductless Electric
Utilities Electricity Connected Propane See Remarks Trash Collection Private
Appliances Convection Oven Dishwasher Dryer Gas Oven Gas Range Microwave Oven Refrigerator Stainless Steel Appliance(s) Washer
Garage Spaces 5
Architectural Style Carriage House Estate Farmhouse Modern Ranch
Construction Materials Frame Shake Siding
Year Built 1850
Property Subtype Single Family Residence
Tax Year 2025
Parcel Number 2000-039-020-00001-000-0009
County Westchester County
Property Type Residential
Garage Y/N Y
Total Rooms 27
Full Baths 4
High School John Jay High School
City Bedford
Senior Community Y/N N
High School District Katonah-Lewisboro
Carport Spaces 3
Carport Y/N Y
Elementary School Increase Miller Elementary School
Property Attached Y/N N
Tax Annual Amount 24668.39
Middle/Junior High School John Jay Middle School
Building Area Units Square Feet
Standard Status Active
Middle/Junior School District Katonah-Lewisboro
Elementary School District Katonah-Lewisboro
Tax Assessed Value 89320
Year Built Effective 2026
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ExteriorParking Features Attached Driveway Garage Private Attached Driveway Garage Private
Water Source Well
Foundation Details Pillar/Post/Pier
Waterfront Y/N N
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* Excluded FeaturesList BySamuel BerekListing Agent
samuel.berek@serhant.comEmail
Affordability Calculator
- Monthly Principal & Interest
- $33,864
- Monthly Property Taxes
- $2,056
- Monthly Home Insurance
- --
Default based on a 30-year fixed rate of 6.25% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
Learn more about how to save NearbySingle family listings in Katonah, NY
Average List Price $1,212,217
Percent of Sale Price 78%
About Katonah, NY 10,833 Population
5% Since 2002
$ 158,435 Median Income
46.8 Median Age
42% Households with Children
Trends Information provided by ATTOM Data Solutions.
4892277 Elementary School
4892612 Middle School
John Jay High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 3/26/2026 | $5,500,000 | | Listed Price |