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$2,799,000

  • Sold
  • Closed
  • Single Family
  • 4 Beds
  • 4 Full Baths
  • 1 Partial Bath
  • 5,203 Sq. Ft.
  • 3 Car Garage
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Welcome to "The Hill Valley House," where timeless design and modern luxury come together in perfect harmony. Completed in 2023 with no expense spared, this one-of-a-kind custom estate sits on 2.66 acres of lush, private grounds and offers an extraordinary blend of timeless design and cutting-edge innovation. Step inside to experience an ambiance of sophistication and comfort, with soaring 10' ceilings throughout, high-end custom treatments, and impeccable finishes. The grand great room is anchored by a stunning dual-sided gas stone fireplace and flows seamlessly into the heart of the home-a spectacular, state-of-the-art gourmet kitchen. Designed for both beauty and function, this culinary showpiece features rich custom wood cabinetry, sleek quartzite countertops with a dramatic waterfall edge, and a large center island with ample seating-perfect for casual dining or elegant entertaining. The kitchen is fully outfitted with top-tier stainless steel appliances, including a professional-grade six-burner gas stove, wine fridge, and an inviting dinette area that overlooks the tranquil backyard. The first-floor primary suite is a true sanctuary, boasting walls of glass that invite nature in and a spa-inspired ensuite with exquisite tilework, a soaking tub, walk-in shower, custom wood double vanity, and a spacious walk-in closet. A private first-floor office adds convenience and flexibility. Upstairs, three additional bedrooms each feature their own ensuite baths, including one with a private rooftop deck. A second-floor entertainment area with built in speakers and walk-in storage room or office complete the upper level. One of the crown jewels of "The Hill Valley House" is the screened-in porch-a luxurious outdoor haven designed for year-round enjoyment. Featuring double French doors, a dramatic dual stone gas fireplace, built-in infrared heaters, and a refined dining area, this exceptional space merges indoor elegance with outdoor serenity. The finished basement includes a dedicated home gym and a vast unfinished area with endless potential-ideal for a media room, wine cellar, or additional living space tailored to your lifestyle. Adding to the home's long list of luxuries are a state-of-the-art solar panel system, whole-house water purification, advanced backup power system, smart home technologies, as well as an oversized three-car garage. Outside, your personal resort awaits-with a heated 19'x36' saltwater in-ground pool, cozy fire pit, and expansive patios-perfect for entertaining or peaceful relaxation. The Hill Valley House offers a lifestyle that feels like a permanent vacation-set on lush, resort-like grounds, yet just minutes from Long Island Sound beaches, local marinas, restaurants, charming town shops, and Stony Brook University. Truly, no detail was overlooked in the creation of this exceptional home. From its superior construction to its thoughtfully curated finishes, this is more than a home-it's a lifestyle. Make this dream property yours today.

Full Property Details for 317 Old Mill Rd

General

  • Sold For: $2,799,000
  • Taxes: $41,089
  • Status: Closed
  • Type: Single Family
  • Source: Long_Island
  • MLS ID: 878416
  • Added to Site: 214 day(s) ago

Interior

  • Number of Rooms: 11
  • Interior Features: First Floor Bedroom, First Floor Full Bath, Bidet, Breakfast Bar, Built-in Features, Cathedral Ceiling(s), Ceiling Fan(s), Chefs Kitchen, Double Vanity, Eat-in Kitchen, ENERGY STAR Qualified Door(s), Entrance Foyer, Formal Dining, Granite Counters, High Ceilings, High Speed Internet, Kitchen Island, Low Flow Plumbing Fixtures, Primary Bathroom, Master Downstairs, Open Floorplan, Open Kitchen, Pantry, Quartz/Quartzite Counters, Recessed Lighting, Smart Thermostat, Soaking Tub, Storage, Walk-In Closet(s), Washer/Dryer Hookup, Wet Bar, Wired for Sound
  • Fireplace: Yes
  • Number of Fireplaces: 1
  • Fireplace(s): Gas, Living Room
  • Appliances: Convection Oven, Dishwasher, Dryer, Electric Oven, Electric Water Heater, ENERGY STAR Qualified Appliances, Exhaust Fan, Gas Range, Humidifier, Microwave, Refrigerator, Stainless Steel Appliance(s), Washer, Water Purifier Owned, Wine Refrigerator
  • Laundry Facilities: Yes
  • Flooring: Ceramic Tile, Hardwood

Rooms

Bathrooms

  • Total Bathrooms: 5
  • Full Bathrooms: 4
  • Half Bathrooms: 1

Bedrooms

  • Total Bedrooms: 4

Other Rooms

  • Laundry: Electric Dryer Hookup, Inside, Laundry Room, Washer Hookup

Additional Information

  • Pool: Yes
  • Private Pool: Yes
  • Pool Description: Fenced, In-Ground, Outdoor Pool, Pool Cover, Salt Water, Vinyl
  • Security/Safety: Security System, Smoke Detector(s), Video Cameras

Exterior

  • Exterior Features: Balcony, Fire Pit, Mailbox, Rain Gutters
  • Porch/Patio/Deck: Covered, Patio, Porch, Screened

Parking

  • Garage: Yes
  • Garage Spaces: 3
  • Parking Features: Driveway, Garage, Garage Door Opener, Private

Location

  • County: Suffolk County
  • Cross Streets: Moriches Rd.
  • Driving Directions: 25A to Moriches Rd./ Left on Old Mill Rd/ follow to #317 on left. OR Edgewood Ave to River Rd./ Bear right on Old Mill Rd. to #317 on right

School Information

  • High School District: Smithtown
  • Elementary School: St James Elementary School
  • Middle School: Nesaquake Middle School
  • High School: Smithtown High School-East

Heating & Cooling

  • Central air: Yes
  • Cooling Type: Central Air
  • Heating Type: Electric, ENERGY STAR Qualified Equipment, Forced Air, Heat Pump, Propane, Solar
  • Heating Zones: 3

Utilities

  • Sewer: Septic Tank
  • Water: Public
  • Utility Description: Cable Available, Electricity Available, Propane, Trash Collection Public, Water Available

Structural Information

  • Architectural Style: Colonial, Farmhouse
  • Detached/Attached: Detached
  • Construction: Advanced Framing Technique, Cedar, Frame, HardiPlank Type
  • Basement: Yes
  • Basement Desc.: Full Basement, Partially Finished, Storage Space
  • Windows: Double Pane Windows, ENERGY STAR Qualified Windows, Insulated Windows
  • Building Size: 5203
  • Square Feet: 5,203
  • Sq. Ft. Source: Plans
  • Year Built: 2023

Lot Features

  • Lot Size (Acres): 2.66
  • Lot Size (Sq. Ft.): 115,870
  • Road Maintenance: Public Maintained Road
  • Fence: Yes
  • Lot Features: Back Yard, Front Yard, Landscaped, Level, Part Wooded, Private, Sprinklers In Front
  • Fencing (Description): Back Yard, Partial

Green Features

  • Energy Generation: Solar

Financial Considerations

  • Taxes Include: Trash
  • Tax Amount: $41,089.7

Disclosures and Reports

  • Special Conditions: None
  • Property ID: 0802-012-00-01-00-004-004
  • Block: 1
  • Lot Number: 4.004

Listed by Daniel Gale Sothebys Intl Rlty
Sold by Serhant LLC

Listing agent

— 317 Old Mill Rd —

  • Daniel Gale Sothebys Intl Rlty

631-584-6600

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 317 Old Mill Rd

School District:Smithtown Central School District
NameGradesDistance
Saint James Elementary School
580 Lake Avenue, Saint James, NY 11780
K-51.4 mi
Disclaimer: School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 317 Old Mill Rd

Date
Details
Price
Change
Source
9/24/2025
Sold
$2,799,000
—
MLS
6/16/2025
Listed
$2,799,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Listed by Daniel Gale Sothebys Intl Rlty
Sold by Serhant LLC

317 Old Mill Road, Nissequogue, NY 11780 (MLS# 878416) is a Single Family property that was sold at $2,799,000 on September 24, 2025. Want to learn more about 317 Old Mill Road? Do you have questions about finding other Single Family real estate for sale in Nissequogue? You can browse all Nissequogue real estate or contact a Coldwell Banker agent to request more information.