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$5,995,999

  • For Sale
  • Active
  • Single Family
  • 6 Beds
  • 7 Full Baths
  • 1 Partial Bath
  • 3 Car Garage
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Muttontown Brand New Brick Center Hall Colonial | Set on over two private acres on a quiet cul-de-sac, 20 Knollwood Road is an exceptional new construction estate that blends timeless architecture with elevated, modern finishes. With six en-suite bedrooms, soaring 10-foot ceilings on every level, and thoughtfully designed indoor and outdoor spaces, this home is perfectly suited for refined living and grand entertaining. The main level showcases radiant porcelain tile, coffered ceilings, and custom millwork throughout. The kitchen is a true showpiece, featuring two oversized islands with seating and storage, marble countertops, paneled Sub-Zero appliances, a Wolf range and ovens, farmhouse sink, pot filler and more. A formal dining room with wet bar and herringbone floors complements the space, while a powder room finished in striking black marble adds a dramatic touch. The expansive living and entertaining areas flow seamlessly to the outdoors through French doors, opening to a porcelain-tiled patio and a heated Gunite saltwater pool with automatic cover, integrated spa, and lush surroundings. The home includes a full house generator powered by two 1,000-gallon propane tanks, three-zone HVAC, a space for a future elevator, and smart home wiring for speakers, alarm, and surveillance. Upstairs, the primary suite offers a private balcony, dual walk-in closets, and a spa-quality bath with double vanities and Toto fixtures. A junior suite with a Juliet balcony offers additional luxury, while a second-floor laundry room and central vacuum with hidden hose system provide modern convenience. All bedrooms feature en-suite baths, with elegant grey, white, and black marble finishes carried throughout. Additional highlights include a three-car garage with room for car lifts, a mudroom entry, baseboard outlets, flush floor vents, and a 300-pound chandelier motor lift. The home is clad in limestone stucco and brick, with black iron doors and Pella windows offering a sleek, modern exterior. The unfinished lower level leaves over 3,000 sq.ft. to the imagination - with full bathroom and second laundry room to cater to the pool. A rare offering in Muttontown-luxury, privacy, and craftsmanship converge at 20 Knollwood Road.

Full Property Details for 20 Knollwood Rd

General

  • Price: $5,995,999
  • Taxes: $25,640
  • Status: Active
  • Type: Single Family
  • Source: Long_Island
  • MLS ID: 842292
  • Updated: 10/15/2025
  • Added to Site: 311 day(s) ago

Interior

  • Number of Rooms: 10
  • Interior Features: First Floor Bedroom, First Floor Full Bath, Breakfast Bar, Built-in Features, Cathedral Ceiling(s), Central Vacuum, Double Vanity, Eat-in Kitchen, Entrance Foyer, Formal Dining, High Ceilings, His and Hers Closets, Kitchen Island, Marble Counters, Primary Bathroom, Open Floorplan, Open Kitchen, Pantry, 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): Electric, Family Room
  • Appliances: Freezer, Gas Oven, Gas Range, Microwave, Refrigerator, Stainless Steel Appliance(s), Wine Refrigerator
  • Laundry Facilities: Yes

Rooms

Bathrooms

  • Total Bathrooms: 8
  • Full Bathrooms: 7
  • Half Bathrooms: 1

Bedrooms

  • Total Bedrooms: 6

Other Rooms

  • Laundry: Gas Dryer Hookup, In Basement, In Hall, Laundry Room, Multiple Locations, Washer Hookup

Additional Information

  • Pool: Yes
  • Private Pool: Yes
  • Pool Description: In-Ground, Outdoor Pool, Pool Cover, Pool/Spa Combo, Salt Water
  • Spa: Yes

Exterior

  • Exterior Features: Balcony, Juliet Balcony

Parking

  • Garage: Yes
  • Garage Spaces: 3
  • Parking Features: Attached, Garage

Location

  • County: Nassau County
  • Cross Streets: Brookville Road
  • Driving Directions: North on Jericho Oyster Bay Road (106), left on Brookville Road, right on Knollwood Road, #20

School Information

  • High School District: Jericho
  • Elementary School: George A Jackson School
  • Middle School: Jericho Middle School
  • High School: Jericho Senior High School

Heating & Cooling

  • Central air: Yes
  • Cooling Type: Central Air
  • Heating Type: Propane, Radiant Floor
  • Heating Zones: 3

Utilities

  • Sewer: Cesspool
  • Water: Public
  • Utility Description: Electricity Connected, Propane, See Remarks, Water Connected

Structural Information

  • Architectural Style: Colonial
  • Detached/Attached: Detached
  • Construction: Brick
  • Basement: Yes
  • Basement Desc.: See Remarks, Unfinished, Walk-Out Access
  • Unfinished Attic: Yes
  • Sq. Ft. Source: Plans
  • Year Built: 2025

Lot Features

  • Lot Size (Acres): 2
  • Lot Size (Sq. Ft.): 87,120
  • Lot Features: Back Yard, Cul-De-Sac, Front Yard, Landscaped, Sprinklers In Front

Financial Considerations

  • Tax Amount: $25,640.99

Disclosures and Reports

  • Special Conditions: None
  • Property ID: 2429-16-B-00-1589-0

Listed by Douglas Elliman Real Estate

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Listing agent

— 20 Knollwood Rd —

  • Douglas Elliman Real Estate

516-359-2672

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

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Schools serving 20 Knollwood Rd

School District:Jericho Union Free School District
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 20 Knollwood Rd Get Price Alerts and Save Property

Date
Details
Price
Change
Source
10/15/2025
Price Reduced
$5,995,999
-3.27%
MLS
9/17/2025
Price Reduced
$6,199,000
-1.59%
MLS
9/02/2025
Price Reduced
$6,299,000
-3.08%
MLS
4/22/2025
Listed
$6,499,000
419.92%
MLS
4/29/2022
Sold
$1,250,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 20 Knollwood Rd

Year
Property Taxes
Change
Tax Assessment
Change
2025
$27,774
603%
$1,204
—
2024
$3,953
-81%
$1,204
—
2023
$20,945
-14%
$1,204
-13%
2022
$24,223
9%
$1,384
1%
2021
$22,143
19%
$1,365
-9%
2020
$18,645
6%
$1,500
—
2018
$17,631
11%
$1,500
—
2016
$15,835
—
$1,500
-6%
2016
$15,835
-15%
$1,588
6%
2019
$18,645
19%
$1,500
-15%
2016
$15,629
—
$1,764
-11%
2014
$15,671
—
$1,980
-17%
2014
$15,671
—
$2,375
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 20 Knollwood Rd

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Down Payment
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*These costs are estimates, and the interest rates assume exceptional credit standing.

Listed by Douglas Elliman Real Estate

20 Knollwood Road, Muttontown, NY 11545 (MLS# 842292) is a Single Family property with 6 bedrooms, 7 full bathrooms and 1 partial bathroom. 20 Knollwood Road is currently listed for $5,995,999 and was received on April 22, 2025. Want to learn more about 20 Knollwood Road? Do you have questions about finding other Single Family real estate for sale in Muttontown? You can browse all Muttontown real estate or contact a Coldwell Banker agent to request more information.

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