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18 20th AvenueSea Cliff, NY 11579

For Sale

$1,650,000

Smart Buyer Rebate $16,500

There's something special about a home that welcomes you before you even enter! At 18 20th Avenue, the beautiful mahogany front porch sets the tone for this exceptional Colonial, offering timeless character, modern luxury, and remarkable privacy in the beautiful Village of Sea Cliff.
Originally built in 1898 and completely rebuilt in 2017 by a builder for his own residence, this thoughtfully designed home combines classic architecture with modern conveniences and quality craftsmanship. Inside, rich hardwood floors, solid wood doors, and sun-filled living spaces lead to an expansive dining area, inviting family room with acoustic pocket doors, and chef-inspired kitchen featuring quartz countertops, a 36-inch Thor gas range, wine refrigerator, and reverse osmosis water filtration. A custom mudroom adds everyday convenience.
Upstairs, the primary suite offers a spa-like experience with a steam shower, radiant heated floors, marble double vanity, and 12-jet soaking tub. Three additional bedrooms and a dedicated laundry room complete the second level, while a semi-finished lower level provides additional flexible space for recreation, storage, and everyday needs, along with a second washer and dryer for added convenience.
Smart-home features include Hunter Douglas motorized blinds, integrated lighting and security systems, and built-in speakers. Additional improvements include Hardie siding, energy-efficient windows, two-zone central air conditioning, and a generator hookup.
Situated on just under a quarter acre, the fully fenced property is beautifully landscaped, offering exceptional privacy, multiple yard areas, a patio, and a deck ideal for entertaining. Landscape lighting and string lights create a wonderful outdoor atmosphere, while sunset views add to the setting. An oversized, recently renovated two-car garage with epoxy floors, a spacious driveway, and an EV charger provide ample parking and convenience.
Just moments from Sea Cliff's waterfront, beaches, parks, restaurants, and shops, this distinctive home offers a blend of historic character, modern comfort, and private outdoor living.

Listed by Raquel Knoell CBR

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Douglas Elliman Real Estate

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646-331-1237

Listed by Thomas Knoell CBR

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Douglas Elliman Real Estate

Last updated October 25, 2026

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Source: OneKey #1062551

Listing Facts

  • TypeSingle-family
  • NeighborhoodSea Cliff Grove
  • Bedrooms4
  • Bathrooms3
  • Days on Prevu17
  • Taxes$17,699/year
  • Size2,022 sqft
  • Price per sqft$816

Amenities

  • Dishwasher
  • Private Outdoor Space
  • Washer/Dryer
  • Air Conditioning
  • Parking

Location

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Listing History

10/14/2026
Listed by Douglas Elliman Real Estate
$1,650,000
  1. 10/14/2026$1,650,000
    Listed by Douglas Elliman Real Estate

Property Details for 18 20th Avenue

Exterior

Construction

  • Window Features: Blinds, Double Pane Windows, Drapes
  • Year Built: 1898
  • Architectural Style: Colonial
  • Construction Materials: Hardi Plank Type
  • Exterior Features: Garden, Lighting, Rain Gutters

Features

  • Fencing: Back Yard, Fenced, Front Yard, Full, Wood
  • Patio And Porch Features: Deck, Patio, Porch

Measurements

  • Building Area Units: Square Feet
  • Lot Features: Back Yard, Corner Lot, Garden, Landscaped, Near Public Transit, Near School, Near Shops, Private, Sprinklers In Front, Sprinklers In Rear, Stone/Brick Wall
  • Lot Size Acres: 0.22
  • Lot Size Square Feet: 9,000

Financial

Taxes

  • Parcel Number: 2423-21-163-00-0886-0
  • Tax Annual Amount: $17,699.00
  • Tax Year: 2026

Interior

Features

  • Appliances: Convection Oven, Dishwasher, Exhaust Fan, Freezer, Gas Oven, Gas Range, Microwave, Refrigerator, Stainless Steel Appliance(s), Tankless Water Heater, Washer, Water Purifier Owned, Wine Refrigerator
  • Flooring: Hardwood, Tile
  • Interior Features: Breakfast Bar, Built-in Features, Chandelier, Chefs Kitchen, Double Vanity, Eat-in Kitchen, Entrance Foyer, Formal Dining, High Ceilings, High Speed Internet, Kitchen Island, Natural Woodwork, Open Kitchen, Original Details, Pantry, Primary Bathroom, Quartz/Quartzite Counters, Recessed Lighting, Smart Thermostat, Soaking Tub, Sound System, Speakers, Storage, Walk-In Closet(s), Washer/Dryer Hookup, Wired For Sound
  • Spa Features: Bath

Measurements

  • Living Area: 2,022
  • Living Area Source: Appraiser

Rooms

  • Basement: Bilco Door(s), Partially Finished, Storage Space
  • Has Basement: Yes
  • Bathrooms Full: 2
  • Bathrooms Half: 1
  • Bathrooms Total Integer: 3
  • Bedrooms Total: 4
  • Rooms Total: 9

Other

Location

  • Tax Block: 163
  • Tax Lot: 886,887,888,907

Parking

Parking

  • Garage Spaces: 2
  • Garage: Yes
  • Parking Features: Detached, Driveway, Electric Vehicle Charging Station(s), Garage, Garage Door Opener, Oversized

Schools

Elementary School

  • Elementary School: Sea Cliff Elementary School
  • Elementary School District: North Shore

High School

  • High School: North Shore Senior High School
  • High School District: North Shore

Middle or Junior School

  • Middle Or Junior School: North Shore Middle School
  • Middle Or Junior School District: North Shore

Utilities

Equipment

  • Cooling: Central Air
  • Heating: Forced Air, Hot Water, Natural Gas, Radiant, Radiant Floor
  • Laundry Features: In Basement, In Hall, Multiple Locations
  • Sewer: Cesspool
  • Utilities: Electricity Connected, Natural Gas Connected, Water Connected
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this single-family home have?

There are 4 bedrooms and 3 bathrooms in this single-family home at 18 20th Avenue.

What schools are nearby to 18 20th Avenue?

Nearby schools include the Sea Cliff Elementary School, North Shore Middle School, and North Shore Senior High School.

Does this single-family home have parking?

Yes, there are 2 parking spaces available for 18 20th Avenue.

What are the annual taxes for 18 20th Avenue?

Annual taxes for this single-family home are estimated at $17,699.

How does 18 20th Avenue compare to other single-family homes in Sea Cliff Grove?

This single-family home is listed 55% above the average price for single-family homes in Sea Cliff Grove and has been on the market for 9 less days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 2,022 sqft.

18 20th Avenue is a 4-bedroom, 3-bath single-family home for sale in Sea Cliff NY 11579. Listed on Prevu for 17 days at $1,650,000. This property features 2,022 square feet of living space, located in Sea Cliff Grove. The median listing price for single-family homes in this area is $1,048,000. Nearby schools include Sea Cliff Elementary School, North Shore Middle School, and North Shore Senior High School. Additional amenities include private outdoor space, dishwasher, air conditioning, parking, and washer/dryer. Browse more single-family home listings in Sea Cliff.

The data relating to real estate for sale on this website comes in part from the IDX Program of OneKey™ MLS. The source of the displayed data is either the property owner or public record provided by non-governmental third parties. It is believed to be reliable but not guaranteed. This information is provided exclusively for consumers’ personal, non-commercial use. Information Copyright 2026, OneKey™ MLS. All Rights Reserved.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.