310 Mt Holly Road Katonah, NY $ 5,500,000
310 Mt Holly Road
$ 5,500,000
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310 Mt Holly Road

Katonah, NY, 10536
$ 5,500,000
Bedrooms7 Baths4.2 Sq 6,900

Monthly Estimate*

$ 33,864

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Single Family Home for sale in Katonah, NY

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 Active

Price

$ 5,500,000

Bedrooms

7

Full Bath

4

Half Bath

2

Property Type

Single Family

Taxes

$ 24,668

Style

Carriage House,Estate,Farmhouse,Modern,Ranch

Lot Size

4

Year Built

1850

Town/City

Katonah

County/Region

Westchester

MLS | Web ID

976632

Features
Interior
Interior 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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General
Sewer 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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Exterior
Parking 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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Internal Only
Street Number 1 310
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* Excluded Features
List By
Samuel Berek

Listing Agent

Serhant Llc

Broker

samuel.berek@serhant.com

Email

Affordability Calculator

$35,920
Per Month
94%
6%
0%
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.
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Nearby
4892277 Elementary School
4892612 Middle School
John Jay High School High School
Pricing History
DatePricePrice ChangeDescription
3/26/2026$5,500,000 Listed Price

Map


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310 Mt Holly Road, Katonah, NY, 10536 is a Single Family Home for sale at $5,500,000 with 6,900 sqft and a lot size of 4. 310 Mt Holly Road has 7 bedrooms, 4.2 baths, and was built in 1850. The property's zip code is 10536 which is in Katonah, NY