4 Riverside Ave

Mastic Beach, NY 11951

$949,999
Price
3
Beds
1,560 Sq. Ft.
$609 / Sq. Ft.
1,560
Sq. Ft.
$609
per Sq. Ft.
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Description

Rare opportunity in Mastic Beach. Fully renovated Cape on a private 1+ acre corner lot with river views, modern upgrades throughout, and flexible living space including a possible 4th bedroom or office. Welcome to 4 Riverside Avenue, a beautifully updated home that offers the perfect combination of space, privacy, and modern comfort. This property stands out with its oversized lot, thoughtful renovation, and peaceful natural surroundings. The home features 3 spacious bedrooms, a potential 4th bedroom...Rare opportunity in Mastic Beach. Fully renovated Cape on a private 1+ acre corner lot with river views, modern upgrades throughout, and flexible living space including a possible 4th bedroom or office. Welcome to 4 Riverside Avenue, a beautifully updated home that offers the perfect combination of space, privacy, and modern comfort. This property stands out with its oversized lot, thoughtful renovation, and peaceful natural surroundings. The home features 3 spacious bedrooms, a potential 4th bedroom or office space, and 3 full bathrooms, providing flexibility for today's lifestyle. Natural light fills the home, highlighting the neutral color palette and hardwood floors throughout, creating a warm and inviting atmosphere from the moment you enter. The fully renovated kitchen is designed for both everyday living and entertaining, featuring brand new stainless steel appliances, granite countertops, and custom cabinetry. The bathrooms have been updated with modern tile finishes, adding a fresh and clean design throughout the home. Major upgrades include a new roof (2026), new electric, new fencing, and updated landscaping. The elegant Mountain Black metal roof adds both durability and striking curb appeal. The spacious basement with walkout access provides excellent potential for additional living space. With areas ideal for a bar, cinema room, recreation space, or future finishing, the lower level offers incredible versatility. Outside, the property truly shines. Sitting on over an acre of land, the home features new trees, fresh landscaping, a fenced front yard, and a fenced backyard, creating a peaceful outdoor setting with plenty of room to relax, entertain, or expand. This home offers convenient access to nearby parks, waterfront areas, shopping, and local amenities. If you are looking for a fully renovated, move in ready home with space, privacy, and modern upgrades on a rare oversized lot with river views, this is one you will want to see in person.
  1. Listed by Rudy Rodriguez • Signature Premier Properties
    P: (631)-585-8400 C: (631)-672-5471 rrodriguez@signaturepremier.com

Property Details for 4 Riverside Avenue

City/Township
Brookhaven
View
Water
Architectural Style
Cape Cod
Waterfront
Yes
LISTING UPDATED: 03/15/2026 03:09 PM

Property Details for 4 Riverside Avenue

StatusActive
MLS #967520
Days on Market25
Taxes$8,602 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeSingle Family
Year Built1955
Lot Size1.02 AC / 44,431 SF
CountySuffolk County
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Location

Listing Courtesy of Signature Premier Properties, Rudy Rodriguez
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Building Information for 4 Riverside Avenue

Stories-Year Built1955Building Size-Lot Size1.02 AC / 44,431 SF

Payment Calculator

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$5,327 per month

30 year fixed, 6.11% Interest

Principal and Interest

$4,610

Property Taxes

$717

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

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Property Information for 4 Riverside Avenue

Summary
Location and General Information
  • Senior Community YN: No
  • Property Attached: No
  • Structure Type: false
  • Property Condition: Updated/Remodeled
  • State Or Province: NY
School Information
  • School District: William Floyd
  • Elementary School District: William Floyd
  • Elementary School: Nathaniel Woodhull Elementary School
  • Middle Or Junior School District: William Floyd
  • Middle Or Junior School: William Floyd Middle School
  • High School District: William Floyd
  • High School: William Floyd High School
Rental
Rental
  • Lease Considered: No
Unit Information
Unit Information
  • Building Units Total: 1
Taxes and HOA Information
Taxes and HOA Information
  • Parcel Number: 0200-940-00-08-00-004-000
  • Tax Assessed Value: $2,050.00
  • Tax Source: Municipality
  • Tax Year: 2025.0
  • Association: No
Interior and Exterior Features
Interior Features
  • Amenities: 1st Floor Bedrm, Bay Window(s), Cape Cod, Chefs Kitchen, Crown Molding, Double Pane Windows, ENERGY STAR Qualified Windows, First Floor Full Bath, Formal Dining, Hardwood Floors As Seen, Laundry Room, New Windows, Open Floorplan, Primary Bathroom, Public, River Access, River Front, Screens, Walk In Closet, Water View, Wood Burning
  • Interior Features: First Floor Bedroom, First Floor Full Bath, Chefs Kitchen, Crown Molding, Formal Dining, Open Floorplan, Primary Bathroom, Walk-In Closet(s)
  • Appliances: Dishwasher, Electric Range, Electric Water Heater, ENERGY STAR Qualified Appliances, Microwave
  • Total Rooms: 10
  • Basement: Full, Walk-Out Access
  • Attic Description: Partial,Partially Finished,See Remarks
  • Fireplace: Yes
  • Fireplace Features: Wood Burning
  • Location Amenities: Capecod, Walk Out Basement, Hardwood Floors As Seen, 1st Fl Master Bedroom, Chef's Kitchen, Formal Dining Room, Walk In Closet, Water View, Double Paned Windows, Energy Star Windows, New Windows
  • Laundry Features: Laundry Room
  • Window Features: Bay Window(s), Double Pane Windows, ENERGY STAR Qualified Windows, New Windows, Screens
  • Flooring: Hardwood
  • Living Area: 1,560.00
  • Basement: Yes
Exterior Features
  • Exterior Property Features: Driveway, Oversized, Private, Bay Window(s), Double Pane Windows, ENERGY STAR Qualified Windows, New Windows, Screens
  • Elevation Certificate: No
  • Construction Materials: Brick
  • Waterfront Features: River Access, River Front
  • Pool Private: No
Lot Information
  • Building Area Units: Square Feet
Parking
  • Parking Features: Driveway, Oversized, Private
  • Garage: No
  • Carport: No
Utilities
  • Cooling: Electric, ENERGY STAR Qualified Equipment, Multi Units, Wall/Window Unit(s), Zoned
  • Heating: Electric, ENERGY STAR Qualified Equipment
  • Heat Fuel Type: Electric, ENERGY STAR Qualified Equipment
  • Sewer: Cesspool
  • Water Source: Public
  • Utilities: Cable Available, Cable Connected, Electricity Available, Electricity Connected, See Remarks, Trash Collection Public, Water Available, Water Connected
Green Features
  • Green Features: Bay Window(s), Double Pane Windows, ENERGY STAR Qualified Windows, New Windows, Screens, Dishwasher, Electric Range, Electric Water Heater, ENERGY STAR Qualified Appliances, Microwave, Electric, ENERGY STAR Qualified Equipment
Agent
Payment and Rate
  • Down Payment Resource: Yes

Property History for 4 Riverside Avenue

DateEvent & SourcePriceAppreciation
Mar 4, 2026

Listed (Active)

ONEKEY #967520

$949,999—
Feb 27, 2023

Sold (Public Record)

Public Record #1526843057

$520,000—
Feb 27, 2023

Sold (Public Record)

Public Record #1526843057

$520,000

+27.5% / yr

Feb 27, 2023

Sold

ONEKEY #3450852

$520,000—
Feb 27, 2023

Sold

ONEKEY #3450852

$520,000—
Jan 20, 2023

Pending

ONEKEY #3450852

—
Jan 20, 2023

Pending

ONEKEY #3450852

—
Jan 5, 2023

Listed (Active)

ONEKEY #3450852

$549,000—
Jan 5, 2023

Listed (Active)

ONEKEY #3450852

$549,000—
Feb 20, 2019

Sold (Public Record)

Public Record #643319966

$195,852

-3.3% / yr

Dec 15, 2008

Sold (Public Record)

Public Record #262187421

$276,000

-6.4% / yr

Aug 31, 2006

Sold (Public Record)

Public Record #226850895

$321,000—
DateEvent & SourcePrice
03/04/2026

Listed (Active)

ONEKEY #967520

$949,999
02/27/2023

Sold (Public Record)

Public Record #1526843057

$520,000
02/27/2023

Sold (Public Record)

Public Record #1526843057

$520,000

+27.5% / yr

02/27/2023

Sold

ONEKEY #3450852

$520,000
02/27/2023

Sold

ONEKEY #3450852

$520,000
01/20/2023

Pending

ONEKEY #3450852

—
01/20/2023

Pending

ONEKEY #3450852

—
01/05/2023

Listed (Active)

ONEKEY #3450852

$549,000
01/05/2023

Listed (Active)

ONEKEY #3450852

$549,000
02/20/2019

Sold (Public Record)

Public Record #643319966

$195,852

-3.3% / yr

12/15/2008

Sold (Public Record)

Public Record #262187421

$276,000

-6.4% / yr

08/31/2006

Sold (Public Record)

Public Record #226850895

$321,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 4 Riverside Avenue

Taxable ValueLand$325Additions$1,725Total$2,050
Home Facts
Beds0Lot Size44,431 SqFtStyleSingle Family ResidenceCountySUFFOLKAPN0200-940.00-08.00-004.000

Schools near 4 Riverside Avenue

This home is within William Floyd Union Free School District.
Rating
School
Type
Grades
Distance
Tangier Smith Elementary School
Public - K to 5
William Paca Middle School
Public - 6 to 8
William Floyd High School
Public - 9 to 12
William Floyd Learning Center
Public - K to 5
Rating
School
Distance
Tangier Smith Elementary School
PublicK to 5

William Paca Middle School
Public6 to 8

William Floyd High School
Public9 to 12

William Floyd Learning Center
PublicK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 4 Riverside Avenue, Mastic Beach, NY 11951

4 Riverside Avenue is a single family home for sale in Mastic Beach, NY 11951. This property was listed for sale on March 4, 2026 by Signature Premier Properties, it's currently listed at $949,999. It has been on the market for a total of 25 days and was last sold on February 27, 2023. This listing's school district is William Floyd Union Free School District. Nearby schools include Tangier Smith Elementary School, William Paca Middle School and William Floyd High School. 4 Riverside Avenue is a 3-bed, 3-bath, 1,560 sqft single family home built in 1955.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties make no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of Signature Premier Properties, Rudy Rodriguez

Based on information submitted to the MLS GRID as of 03/15/2026 03:09 PM. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Properties displayed may be listed or sold by various participants in the 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. The data is deemed reliable but is not guaranteed by MLS GRID. Use of the MLS GRID data may be subject to an end user license agreement prescribed by the applicable MLS of the Member Participant, if any, and as amended from time to time.