Skip to main content

MLS ID KEY1065423Last updated Oct 28, 2026

Single Family

323 Mill Hill Road

Active · Oyster Bay · Nassau County, NY 11765

Bedrooms
4 Beds
Bathrooms
5 Baths
Year built
1966
Est. monthly taxes
$2,856.34
Property gallery0 / 50
Loading photo…Photo unavailable

About this home

A Timeless Gold Coast Equestrian Estate Refined Country Living in the Tradition of a Classic Gentleman’s Farm Set on 6.75 picturesque acres in the heart of Long Island’s storied Gold Coast, 323 Mill Hill Road seamlessly blends the elegance of a beautifully renovated Colonial farmhouse with the authenticity of a private equestrian estate. Located in coveted Mill Neck, within easy reach of Manhattan, this exceptional property offers a rare combination of refined country living, natural beauty, and turnkey equestrian facilities. Thoughtfully renovated while preserving its architectural character, the residence features soaring beamed ceilings, exquisite herringbone floors, and expansive walls of glass that fill the interiors with natural light. The chef’s kitchen is anchored by a substantial Danby marble island, marble countertops, a six-burner Wolf range, and double ovens. Two magnificent 12-foot Marvin sliding glass doors open onto a newly constructed bluestone terrace, seamlessly connecting the interiors with the surrounding landscape. The generously scaled living room, distinguished by reclaimed barnwood beams and a wood-burning fireplace, offers an inviting setting for gracious entertaining. The primary suite is a private sanctuary, featuring a sitting area, sun deck, balcony overlooking the paddocks and riding arena, and an oversized custom closet. The spa-inspired bath includes a steam shower, Jacuzzi tub, TOTO fixtures, and radiant heated floors. Four bedrooms, including a first-floor guest suite, provide comfortable accommodations, while a dedicated fitness room and infrared sauna complete the home's amenities. The Grounds: Sweeping lawns, mature specimen trees, and beautifully established gardens create a landscape of remarkable beauty and privacy. Flowering cherry trees, perennial gardens, seasonal plantings, and cascading wisteria lend the grounds the timeless character of a classic country estate. A wisteria-draped pergola, outdoor gas fire pit, and elevated viewing platform overlooking the paddocks provide enchanting settings for outdoor entertaining and quiet enjoyment of the pastoral surroundings. The Equestrian Estate: The property's exceptional equestrian facilities include two well-appointed barns, a professional-scale riding arena, and thoughtfully designed paddocks and turnouts. The fully insulated, heated, and air-conditioned 40-by-100-foot main barn offers 11–12 stalls, several with private walkouts, along with a wash stall, tack room, feed room, laundry facilities, half bath, and expansive hayloft. A second barn provides 3 additional stalls and a legal groom's loft apartment. A 200-by-120-foot outdoor riding arena is complemented by seven grass paddocks, two oversized bluestone paddocks, and an expansive additional field suitable for riding and turnout. Every paddock has its own water supply, while a covered equine treadmill provides additional training and conditioning capabilities. Charming chicken coops and a dedicated goat hill complete the property's authentic farm setting. Grandfathered provisions permitting horses and other farm animals further distinguish this rare offering. Additional highlights include comparatively low property taxes, private well water, and a Generac whole-property generator. Just minutes from the charming villages, restaurants, boutiques, and amenities of Long Island's North Shore, the estate offers exceptional privacy without sacrificing convenience. A property of uncommon character and versatility, 323 Mill Hill Road presents a rare opportunity to experience the finest traditions of Gold Coast country living, where timeless architecture, natural beauty, and equestrian excellence come together.

Listing snapshot

Days on site
5 days
Listed on MLS
Oct 23, 2026
Full baths
4
Half baths
1
Annual property tax (MLS)
$34,276.13
Tax year
2025
Area source (MLS)
Other
Listing brokerage
BERKSHIRE HATHAWAY
MLS ID
KEY1065423
Last updated
Oct 28, 2026

General features

Property type
Single Family
Property subtype
Single Family Residence
Year built
1966
Garage
No
Parking
Driveway
Water source
Private
Sewer
Septic Tank
Utilities
Electricity Available, Natural Gas Connected

Interior features

Basement
Finished, Full, Partial
Heating
Natural Gas
Cooling
Central Air, Ductwork
Interior
First Floor Bedroom, First Floor Full Bath, Beamed Ceilings, Breakfast Bar, Built-in Features, Cathedral Ceiling(s), Ceiling Fan(s), Chefs Kitchen, Crown Molding, Double Vanity, Eat-in Kitchen, Entertainment Cabinets, Entrance Foyer, Formal Dining, High Ceilings, Kitchen Island, Marble Counters, Natural Woodwork, Open Floorplan, Open Kitchen, Pantry, Primary Bathroom, Recessed Lighting, Sauna, Walk-In Closet(s), Wet Bar
Appliances
Convection Oven, Cooktop, Dishwasher
Fireplace
Yes
Fireplaces
1

Exterior features

Architectural style
Colonial, Farmhouse
Construction materials
Advanced Framing Technique
Private pool
No

Schools (MLS)

Elementary school
Theodore Roosevelt School
Elementary school district
Oyster Bay-East Norwich
Middle school
Oyster Bay High School
Middle school district
Oyster Bay-East Norwich
High school
Oyster Bay High School
High school district
Oyster Bay-East Norwich

School information is provided by the MLS. Confirm attendance eligibility with the school district.

Recent activity

  1. Listing updated from MLS
  2. MLS status changed
  3. Price changed to $5,249,000
  4. First seen on this site

Location

Oyster Bay · Nassau County, NY 11765Show interactive map
323 Mill Hill Road

Oyster Bay · Nassau County, NY 11765

Google Maps directions

Estimate monthly payment

Loan detailsFixed-rate, fully amortizing loan. Edit the assumptions below; no market rate is supplied.
Property expenses (USD)
MLS amounts are prefilled when available and can be edited. Confirm what fees include. Unknown fee frequencies cannot be converted automatically.Property expenses: MLS values where available; missing values stay blank.

Estimated monthly principal & interest—

Monthly property taxNot provided

Monthly association / maintenance feesNot provided

Estimated monthly total of entered costs—

Excludes insurance, mortgage insurance, special assessments and lender fees. MLS taxes may reflect abatements or exemptions and can change.

Listing data is supplied by the MLS and may change without notice.