393 Mill River Road, Muttontown, NY, 11771 | $10,750,000

Tucked behind a private gated drive and set across over eight pristine acres, this iconic 1916 manor estate has been comprehensively restored and strategically enhanced to meet the expectations of today’s most discerning buyer. Historic architecture remains intact, while modern systems, technology, and amenities have been elevated to a truly exceptional level. Grand formal living and dining rooms feature museum-quality moldings and millwork, offering a refined backdrop for both intimate gatherings and large-scale entertaining. The gourmet kitchen is designed for serious cooking and seamless hosting, flowing naturally into the home’s main living spaces. A striking paneled library with wood-burning fireplace provides a moody, private retreat, while the showstopping 23’ x 44’ great room by Smiros & Smiros commands attention with 16-foot ceilings and a dramatic stone fireplace—engineered for memorable entertaining. The primary suite functions as a true private residence within the home, complete with a separate sitting room, coffee bar, and half bath, a spa-caliber marble bathroom with radiant heated floors, and dual dressing rooms. Five additional en-suite bedrooms, including a fully ADA-accessible suite, along with an office overlooking the gardens, complete the second level. Amenities rival those of a private resort, including a paneled elevator, indoor endless lap pool, catering kitchen, dog spa, a fully refreshed gym, and a discreet panic room / walk-in vault offering an elevated level of security. For the automotive collector, the estate delivers rare flexibility: a heated three-car garage with soaring ceiling heights designed to accommodate lifts for up to six vehicles, complemented by two additional single-car garages. The grounds are equally intentional. A new slate roof, heated gunite pool, Har-Tru tennis court with lighting (recently resurfaced and fenced), putting green, English gardens, playhouse, and curated outdoor lighting create a private, park-like setting designed for year-round enjoyment. Extensive masonry restoration, irrigation repair, landscape clearing, and exterior upgrades have been executed at scale. Behind the scenes, the home has undergone substantial systems modernization, including new and serviced HVAC, complete attic insulation, comprehensive electrical upgrades, restored fireplaces, upgraded pool infrastructure, a fully serviced gate and telecom system, and enterprise-grade security with AI-enabled cameras and property-wide WiFi coverage. The interior has been fully refreshed with newly painted finishes, refinished hardwood floors, custom window screens throughout, and exterior trim replaced with durable Azek for longevity. This is not simply a restored estate—it is a fully realized modern compound, where legacy architecture meets forward-thinking execution

Features

  • Rooms: 22
  • Bedrooms: 9
  • Baths: 8 full / 4 half
  • Style: Estate
  • Year Built: 1916
  • Garage: 5-car
  • Heating: Forced Air, Natural Gas, Radiant
  • Cooling: Central Air
  • Basement: Finished, Walk-Out Access
  • Approx Sq. Feet: 13,058
  • Acreage: 8.17
  • Est. Taxes: $97,837
  • Elem. School: Theodore Roosevelt School
  • Middle School: Oyster Bay High School
  • High School: Oyster Bay High School
  • School District: Oyster Bay-East Norwich
  • Pool: Yes
  • Appliances: Gas Range, Wine Refrigerator
  • MLS#: 945312
  • Days on Market: 1 day
  • Website: https://www.raveis.com
    /eprop/945312/393millriverroad_muttontown_ny?source=qrflyer
Listing information has been assembled from various sources of varying degrees of reliability. Any information critical to the buying decision should be independently verified.Listing courtesy of Nest Seekers LLC   Phone: 516-922-2878

William Raveis Family of Services

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888.699.8876

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Frank KolbSenior Vice President - Coaching & Strategic, William Raveis Mortgage, LLC

NMLS Mortgage Loan Originator ID 81725

203.980.8025

Frank.Kolb@raveis.com

Our Executive Mortgage Banker:

  • Is available to meet with you in our office, your home or office, evenings or weekends
  • Offers you pre-approval in minutes!
  • Provides a guaranteed closing date that meets your needs
  • Has access to hundreds of loan programs, all at competitive rates
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Ryan FortierInsurance Sales Director, William Raveis Insurance

516.739.7731

Ryan.Fortier@raveis.com

Our Insurance Division:

  • Will Provide a home insurance quote within 24 hours
  • Offers full-service coverage such as Homeowner's, Auto, Life, Renter's, Flood and Valuable Items
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    Encompass, Travelers, Fireman's Fund, Middleoak Mutual, One Beacon and American Reliable

393 Mill River Road, Muttontown, NY, 11771

$10,750,000

Customer Service

William Raveis Real Estate

Phone: 888.699.8876

Contact@raveis.com

Frank Kolb

Senior Vice President - Coaching & Strategic

William Raveis Mortgage, LLC

Phone: 203.980.8025

Frank.Kolb@raveis.com

NMLS Mortgage Loan Originator ID 81725

5/6 (30 Yr)
Adjustable Rate Jumbo*
30 Year
Fixed-Rate Jumbo
15 Year
Fixed-Rate Jumbo
Loan Amount $8,600,000 $8,600,000 $8,600,000
Term 360 months 360 months 180 months
Initial Interest Rate** 5.000% 5.750% 5.500%
Interest Rate based on Index + Margin 8.125%
Annual Percentage Rate 5.973% 5.858% 5.681%
Monthly Tax Payment $8,153 $8,153 $8,153
H/O Insurance Payment $125 $125 $125
Initial Principal & Interest Pmt $46,167 $50,187 $70,269
Total Monthly Payment $54,445 $58,465 $78,547

* The Initial Interest Rate and Initial Principal & Interest Payment are fixed for the first and adjust every six months thereafter for the remainder of the loan term. The Interest Rate and annual percentage rate may increase after consummation. The Index for this product is the SOFR. The margin for this adjustable rate mortgage may vary with your unique credit history, and terms of your loan.

** Mortgage Rates are subject to change, loan amount and product restrictions and may not be available for your specific transaction at commitment or closing. Rates, and the margin for adjustable rate mortgages [if applicable], are subject to change without prior notice.

The rates and Annual Percentage Rate (APR) cited above may be only samples for the purpose of calculating payments and are based upon the following assumptions: minimum credit score of 740, 20% down payment (e.g. $20,000 down on a $100,000 purchase price), $1,950 in finance charges, and 30 days prepaid interest, 1 point, 30 day rate lock. The rates and APR will vary depending upon your unique credit history and the terms of your loan, e.g. the actual down payment percentages, points and fees for your transaction. Property taxes and homeowner's insurance are estimates and subject to change.