name

310 Mt Holly

Katonah | New York

A Once-in-a-Generation Estate Opportunity

Set on four pastoral acres in one of Northern Westchester’s most iconic and sought-after addresses, Bellwether Farm presents an exceptionally rare development opportunity: the chance to establish a legacy estate on storied Mt. Holly Road. Defined by rolling meadows, ancient stone walls, and classic white horse fencing, the property evokes the spirit of a bygone era — a return to the quiet elegance of 19th-century farm life. Once a thriving working farm, the land remains a pristine tableau of open, level fields and enduring natural beauty.

At the heart of the property stands a curated collection of three historic structures — the Barn, Carriage House, and Milk House — each in various stages of thoughtful restoration by designer Tom Givone, and ideal for guest accommodations, creative spaces, or auxiliary living. The Main House has been fully gutted, providing a blank architectural canvas for a custom dream home. Together, they offer a rare convergence of heritage and possibility — the opportunity to honor the past while creating a bespoke, multi-structure country estate infused with modern luxury.

Just one hour north of Manhattan, Bellwether Farm is more than land and buildings, it is a pastoral sanctuary, a generational property of rare provenance and potential. In a region celebrated for its distinguished country homes, the opportunity to create a multi-structure compound of this scale and character on Mt. Holly’s historic dirt road is truly vanishing. Current zoning would no longer allow such a development, making this an irreplaceable offering.

A seven bedroom Board of Health septic system has been approved, offering a streamlined path to development.

Set on four pastoral acres in one of Northern Westchester’s most iconic and sought-after addresses, Bellwether Farm presents an exceptionally rare development opportunity: the chance to establish a legacy estate on storied Mt. Holly Road. Defined by rolling meadows, ancient stone walls, and classic white horse fencing, the property evokes the spirit of a bygone era — a return to the quiet elegance of 19th-century farm life. Once a thriving working farm, the land remains a pristine tableau of open, level fields and enduring natural beauty. At the heart of the property stands a curated collection of three historic structures — the Barn, Carriage House, and Milk House — each in various stages of thoughtful restoration by designer Tom Givone, and ideal for guest accommodations, creative spaces, or auxiliary living. The Main House has been fully gutted, providing a blank architectural canvas for a custom dream home. Together, they offer a rare convergence of heritage and possibility — the opportunity to honor the past while creating a bespoke, multi-structure country estate infused with modern luxury. Just one hour north of Manhattan, Bellwether Farm is more than land and buildings, it is a pastoral sanctuary, a generational property of rare provenance and potential. In a region celebrated for its distinguished country homes, the opportunity to create a multi-structure compound of this scale and character on Mt. Holly’s historic dirt road is truly vanishing. Current zoning would no longer allow such a development, making this an irreplaceable offering. A seven bedroom Board of Health septic system has been approved, offering a streamlined path to development.
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The Barn

A striking marriage of rustic charm and contemporary upgrades, the Barn retains historic details such as wavy glass diamond-paned windows and oversized barn doors. A fully renovated two-bedroom accessory apartment includes an updated kitchen, recessed lighting, and a new full bath. Below, a flexible open studio space with floor-to-ceiling windows and a half bath awaits final transformation. Additional upgrades include new plumbing and electric, Bosch HVAC, Fujitsu mini-splits, and a whole-house generator. A dramatic 26-foot-wide wall of storefront glass has been custom-fabricated to maximize morning light and panoramic views, and is ready for installation at the new owners discretion. Wide plank pine flooring has been milled from century old trees on the property and can be made available as well. All plans for completion of the Barn interior have been filed with and permitted by the Town of Bedford.

Exterior of The Barn - Current

Exterior of The Barn - Rendering of Permitted Design Plans

The Barn - Second Floor Two Bedroom Apartment

The Barn - Second Floor Two Bedroom Apartment - Rendering of Permitted Design Plans

The Barn - Second Floor Two Bedroom Apartment Kitchen Area

The Barn - Second Floor Two Bedroom Apartment Kitchen - Rendering of Permitted Design Plans

The Carriage House

Reimagined from the foundation up, the Carriage House blends original architectural details with modernist sensibility. Large swaths of commercial glass flood the open plan interiors with natural light and create a dramatic contrast with ancient hand-hewn beams, restored antique brick flooring, and original wavy glass windows – ideal for creative living. Cedar shake siding, a standing seam metal roof, new footers, all-new electric, and split-level HVAC provide long-term functionality. All plans for completion of the Carriage House interior have been filed with and permitted by the Town of Bedford.

The Carriage House - First Level

The Carriage House - First Level - Rendering of Permitted Design Plans

The Carriage House - First Level

The Carriage House - First Level - Rendering of Permitted Design Plans

The Carriage House - Second Level

The Carriage House - Second Level - Rendering of Permitted Design Plans

The Milk House

The charming and compact Milk House features original beadboard interiors, antique brick floors, and wavy glass windows beneath a new standing seam metal roof. It is perfectly suited for conversion into a writer’s studio, guest retreat, or garden cottage.

The Main House

The Main House presents an exceptional opportunity to create a custom dream residence from the ground up. For those seeking inspiration, architectural plans for a bespoke modernist home seamlessly integrating stunning architecture into the bucolic landscape are available for consideration. 

Schedule a Tour

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Schedule a Tour

We would love to show you our beautiful property. Please select your preferred date and time below. An agent will be in touch shortly to confirm your appointment.

Thank you for your interest in 310 Mt Holly Road, Katonah 10536. We are reviewing your request and will be in touch shortly!
Carine Nowak

Carine Nowak

Licensed Real Estate Salesperson

Welcome! The nice thing about Carine’s business is that her clients usually become part of her circle of friends; integrity, trust, and friendship are what it's all about to her. She attributes her success to years as an owner and creator of an upscale catering business. She spent the majority of her career budgeting projects and planning events, and she has transposed that knowledge to real estate, where she utilizes her organization and negotiating experience while sharing her market knowledge and enthusiasm. The commitment and professionalism she shares combined with her warmth and friendliness are invaluable to clients.

She is committed and focused in every area of the market - whether it is major estates, horse properties, new construction, commercial investments and leases, starter homes, or condos. She lives by the belief that success imposes an obligation and commitment to giving back to the community. She has consistently achieved the highest level of recognition at the Hudson Gateway Board of Realtors® and ranks in the top tier of brokers in closed sales volume, as well as being acknowledged as one of the top 8% in the entire country.

Carine has been licensed since 2002. She specializes in residential real estate in Westchester, Putnam, Dutchess, and Bronx Counties and has vast experience in multi-family investment and commercial properties. She is considered a specialist in the luxury market, unique properties, and new construction. She has sold over 200 properties in her career with the use of vast marketing skills including staging and brochure designs, negotiating bank appraisals that help close deals with inspection conflict resolution techniques. When she is not finding the perfect home for buyer clients or getting top dollar for her listings, she is entertaining friends, and enjoying long walks at Ward Pound Ridge Reservation.
Cate Hegarty

Cate Hegarty

Licensed Real Estate Salesperson

Cate’s passion for real estate began at a young age, growing up immersed in the industry and learning from her mother, Carine, a successful agent since 2003. From attending open houses as a child to understanding real estate terms before she could even spell them, Cate was naturally drawn to the business.

Born and raised in Katonah, in Northern Westchester, Cate attended Katonah-Lewisboro Schools, where she met her husband, Matt. She went on to graduate in just three years from the University at Buffalo and wasted no time launching her own real estate career shortly after. In her first year in business, she sold over $25M in properties, quickly earning recognition for her sharp analytical skills and strategic mindset. Since 2022, Cate has been consistently ranked among the Best Real Estate Agents in Westchester by Westchester Magazine. A dedicated student of the industry, Cate has worked closely with one of her key mentors, the former director of coaching at Compass, helping coach and train Compass agents nationwide.

Over the years, she has lived in multiple communities across Westchester, gaining firsthand experience that allows her to expertly guide clients in finding the right town and home. She and her husband own an investment property in Bronxville, which they fully renovated before taking on their next project—their current home in Northern Westchester.

Cate has an in-depth understanding of Westchester’s communities, including commute options, property taxes, pricing, and schools. She expertly guides her clients across the county, ensuring they explore all available options. By leveraging her extensive network of agents, she provides buyers with early access to exclusive listings and maximizes exposure for her sellers' homes.

Cate has a deep passion for interior design and brings this expertise to every property she represents. Whether assisting clients with Compass Concierge, Staging, or full-scale renovations, she has built strong relationships with local contractors, building departments, and vendors to ensure every project is executed seamlessly.

Beyond sales, anyone who knows Cate knows that her clients mean the world to her and she genuinely cares for them and creating as seamless of an experience as possible, treating them like family and going to great lengths to ensure they are well taken care of which is why so much of her business comes from repeat clients and referrals.

Cate and Matt, along with their toy poodle, Greta, reside in Northern Westchester, where they feel most at home. In her spare time, she enjoys practicing Pilates, hosting family and friends, and traveling whenever she gets the chance.

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