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20 Greenwich Avenue, Bayville, NY 11709

Nassau County

Key Facts

5Beds
4Baths
3,558Sq Ft
1948Year Built
0.25Lot (acres)

Description

Bayville Waterfront Two Family Masterpiece. Experience a unique lifestyle with this home. Originally part of the historic Long Island Sound ferry trade community in 1930 (per FEMA) this property was reconstructed as a two-family residence after WWII (1948 per Nassau Property Record) and meticulously modernized over the following years . The home offers a rare blend of coastal history and contemporary luxury on a quarter acre of beachfront property that includes approximately 3,550 sq. ft. of interior living space. The versatile floor plan features 5 generous bedrooms and 3.5 designer bathrooms incorporated into two apartments, for extra income or as a compound. The property offers on-site parking for 6 cars with covered parking for at least 4 of those cars. Unrivaled Shoreline Privacy. This property offers approx. 80ft of private deeded beach frontage, extending to the mid-high tide line—a rare feature providing superior privacy. The outdoor resort experience includes, covered sitting areas, plus three remote-operated awnings. Superior Infrastructure. Built for peace of mind with a waterproofed upper-level boiler room, dual central air units, dual hot water heaters, and a comprehensive security system with a remote front gate and soundproofed between units. The Greenwich Avenue Property Owners Association (no mandatory dues) provides Village enforced permit-only resident parking and property owners private beach next to your own deeded beach. The property is ideally situated with the Sound side Beach and playground on the corner, adjacent to historic Walls Wharf and close distance to the Crescent Beach Club, this is a true seaside retreat. Excellent potential for secondary income; short-term stays permitted in secondary unit with owner-occupancy per local code. Cleared Engineer Inspection. New roof (complete tear-off) Feb 2013 with15-yr warranty, materials and labor.

Property Information

Property Type

Residential Income

Sub-Type

Duplex

Style

Contemporary

Year Built

1948

Living Area

3,558 sq ft

Lot Size

0.25 acres

Lot Dimensions

80x138

Parking Spaces

6

Days on Market

48

MLS® Listing#

998376

Property Features

Interior

Breakfast BarCathedral Ceiling(s)Ceiling Fan(s)ChandelierCrown MoldingEat-in KitchenEntrance FoyerGranite CountersHigh Speed InternetHis and Hers ClosetsKitchen IslandNatural WoodworkOpen FloorplanSound SystemStorageWalk-In Closet(s)Wired for Sound

Exterior

Awning(s)BalconyRain Gutters

Cooling

Central Air

Heating

Hot Water

Flooring

Ceramic TileWood

Fireplace

Wood Burning

Parking

AttachedCarportDrivewayTandem

Laundry

Gas Dryer HookupIn KitchenLaundry Room

Patio

CoveredDeck

Fencing

Chain LinkFullVinyl

Lot Features

Waterfront

Construction

StoneVinyl Siding

Windows

Double Pane WindowsSkylight(s)

Security

Security GateSecurity Lights

Utilities

Natural Gas AvailableCable ConnectedElectricity ConnectedNatural Gas ConnectedWater Connected

Sewer

CesspoolSeptic Tank

Water Source

Public

Schools

Elementary:
Bayville Elementary School
Middle:
Locust Valley Middle School
High:
Locust Valley High School

Financial Details

Annual Taxes

$21,931

Assessed Value

$1,076

Parcel Number

2401-28-011-00-0053-0

Directions

From LIE; Head North on NY-106 N / NY-107 N (Oyster Bay Road) directly from the Exit 40 interchange. Stay left to continue on NY-106 N when NY-107 splits off toward Glen Cove. Follow NY-106 N for approximately 7.5 miles through Jericho, Syosset, and Muttontown into Oyster Bay. Turn left onto Lexington Avenue in Oyster Bay Village. Turn left onto W Main Street, which quickly becomes West Shore Road. Follow West Shore Road North for 2.5 miles across the bridge over Mill Neck Creek into Bayville. Turn right onto Bayville Avenue after crossing the bridge. Turn right onto Greenwich Avenue, and number 20 will be on your right

Affordability Calculator

$359,600

Estimated monthly payment

$9,570/mo

Principal $1,438,400 · Est. interest $2,006,696 over 30 yrs

Neighborhood Market Statistics

How this home compares to active listings in Bayville, NY

$1,000,000
Median Listing Price
58
Median Days on Market
2,219
Median Sq Ft
$536
Median Price / Sq Ft
17
Active Listings
  • This home’s price is 80% above the area median.
  • Its price per sq ft is 6% below the area median.

Market statistics compiled from active EXIT Realty® and MLS listings in Bayville, NY.

Location

Map showing the location of 20 Greenwich Avenue, Bayville, NY 11709

Points of Interest in Bayville, NY

Showing the Bayville area map.

Nearby Schools

  • Bayville Elementary School

    Elementary · 1.1 mi away

  • Bayville Primary School

    Elementary · 1.2 mi away

  • Theodore Roosevelt Elementary School

    Elementary · 2.5 mi away

  • Oyster Babies

    School · 2.5 mi away

  • Learning Tree Nursery School

    School · 2.6 mi away

  • Oyster Bay High School

    Secondary · 2.8 mi away

  • Locust Valley Elementary School

    Elementary · 2.8 mi away

  • St Dominic Elementary School

    Elementary · 2.8 mi away

  • Oyster Bay-East Norwich Central School Dist

    School · 2.8 mi away

  • Locust Valley Day School

    School · 2.9 mi away

  • Ann McArthur Primary School

    Elementary · 2.9 mi away

  • St Dominic High School

    Secondary · 3.0 mi away

  • Locust Valley High School

    Secondary · 3.0 mi away

  • Locust Valley Central School District

    Elementary · 3.0 mi away

  • Locust Valley Central School District

    School · 3.0 mi away

  • Portledge School

    School · 3.5 mi away

  • Friends Academy

    School · 4.1 mi away

  • James H Vernon School

    Elementary · 4.1 mi away

  • Lloyd Harbor School

    Elementary · 4.3 mi away

  • East Woods School

    School · 4.3 mi away

Commute Calculator

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Nearby Homes

Similar Homes Nearby

Similar Home Values

Comparable nearby listings and their asking prices.

AddressPriceBedsBathsSq Ft
35 Adams Avenue, Bayville, NY$1,349,000432,970
5 High Court, Bayville, NY$1,695,000442,510
347 Bayville Avenue, Bayville, NY$1,988,888742,952

Moving Cost Estimate

EXIT Agents in Bayville

Listing Courtesy: Greene Realty Group - 8882785840

Presented by: Derek J. Greene

The data relating to real estate for sale on this website comes in part from the Internet Data exchange of OneKey MLS. IDX information is provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information deemed reliable but not guaranteed. Copyright ©2026 OneKey MLS. All Rights Reserved
Fair Housing Notice

The data relating to real estate for sale on this web site comes in part from the Internet Data Exchange (IDX) program of one or more Multiple Listing Services (MLS). Listing information is deemed reliable but is not guaranteed accurate. Copyright © EXIT Realty® and respective MLS providers.

Data provided by LIBOR. MLS® Listing#998376. © 2026EXIT Realty®. All rights reserved.