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MLS ID KEY986988Last updated Sep 18, 2026

Single Family

20 Knollwood Road

Active · Oyster Bay · Nassau County, NY 11545

Bedrooms
6 Beds
Bathrooms
8 Baths
Year built
2026
Est. monthly taxes
$0
Property gallery0 / 50
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About this home

EXCEPTIONAL NEW CONSTRUCTION! Luxury Living at it's finest! Welcome to 20 Knollwood Road, Muttontown in the Jericho School District. Experience the pinnacle of luxury living in this newly built estate, offering approximately 7,000 square feet of refined design and superior craftsmanship by a highly regarded builder. Every inch of this home reflects meticulous attention to detail, from the bespoke millwork and custom paneling to the soaring ceilings and elegant herringbone flooring. A striking custom iron entry door welcomes you into a grand foyer, setting the stage for the home’s sophisticated yet inviting ambiance. The chef’s kitchen is a showstopper, featuring dual oversized islands, premium Sub-Zero and Wolf appliances, and effortless flow into formal and casual living spaces. Entertain with ease in the formal dining room or at the beautifully appointed wet bar with wine refrigeration. Designed for seamless indoor-outdoor living, French doors open to an expansive porcelain patio and a true resort-style backyard. Enjoy a fully outfitted outdoor kitchen, heated gunite pool with spa, and lush surroundings perfect for entertaining or relaxing in privacy. This impressive residence includes 6 generously sized bedrooms, all with en-suite baths, and a total of 7.5 designer bathrooms. The primary suite offers a luxurious retreat with spa-like finishes. Additional highlights include radiant heated bathroom floors, whole-house generator, central vacuum, Pella windows, circular driveway, and a sprawling lower level complete with a full bath and direct backyard access. A rare offering combining scale, sophistication, and immediate occupancy in one of Long Island’s most desirable locations.

Listing snapshot

Days on site
59 days
Listed on MLS
May 14, 2026
Full baths
7
Half baths
1
Annual property tax (MLS)
$0
Tax year
2026
Area source (MLS)
Plans
Listing brokerage
LAFFEY REAL ESTATE
MLS ID
KEY986988
Last updated
Sep 18, 2026

General features

Property type
Single Family
Property subtype
Single Family Residence
Year built
2026
Garage
Yes
Garage spaces
3
Parking
Driveway, Garage
Water source
Public
Sewer
Cesspool
Utilities
See Remarks

Interior features

Basement
Full
Heating
Forced Air, Propane, Radiant Floor
Cooling
Central Air
Interior
First Floor Bedroom, First Floor Full Bath, Cathedral Ceiling(s), Central Vacuum, Chefs Kitchen, Crown Molding, ENERGY STAR Qualified Door(s), Entrance Foyer, Formal Dining, High Ceilings, His and Hers Closets, In-Law Floorplan, Kitchen Island, Marble Counters, Open Floorplan, Pantry, Walk-In Closet(s)
Appliances
Cooktop, Dishwasher, Gas Cooktop, Gas Oven, Gas Range, Refrigerator, Wine Refrigerator
Flooring
Hardwood
Fireplaces
1

Exterior features

Architectural style
Colonial
Construction materials
Brick
Private pool
Yes

Schools (MLS)

Elementary school
George A Jackson School
Elementary school district
Jericho
Middle school
Jericho Middle School
Middle school district
Jericho
High school
Jericho Senior High School
High school district
Jericho

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

Recent activity

  1. Listing updated from MLS
  2. Price changed to $5,499,999
  3. First seen on this site
  4. MLS status changed

Location

Oyster Bay · Nassau County, NY 11545Show interactive map
20 Knollwood Road

Oyster Bay · Nassau County, NY 11545

Google Maps directions

Estimate monthly payment

Loan detailsFixed-rate, fully amortizing loan. Edit the assumptions below; no market rate is supplied.
Property expenses (USD)
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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.