Back to property search

Active

4 Riverside Avenue

Mastic Beach, NY, 11951

$799,999
3Bedrooms
3Bathrooms
1,560Interior sq ft
1.02Acres
1955Year built

AN INTRODUCTION

A closer look.

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.

Property overview

Property type
Single Family Residence
Architecture
Cape Cod
Condition
Updated/Remodeled
Year built
1955
Lot size (sq ft)
44,431
Status
Active
Listed
2026-03-04
MLS number
KEY967520

Interior & comfort

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
Heating
Electric, ENERGY STAR Qualified Equipment
Cooling
Electric, ENERGY STAR Qualified Equipment, Multi Units, Wall/Window Unit(s), Zoned
Basement
Full, Walk-Out Access

Outdoors & amenities

Parking
Driveway, Oversized, Private
Waterfront
River Access, River Front
Views
Water

Schools & location

Postal town
Mastic Beach
County
Suffolk County
School district
William Floyd
Elementary school
Nathaniel Woodhull Elementary School
Middle school
William Floyd Middle School
High school
William Floyd High School

Taxes & utilities

Annual property taxes
$8,602
Tax year
2025
Association
No
Water
Public
Sewer
Cesspool

Listing courtesy of Signature Premier Properties · 631-585-8400
MLS #KEY967520 · Active

LET’S CONNECT

Arrange a showing.

Share your preferred dates and any questions. We’ll follow up to confirm availability.

Prefer to talk? 516.888.9711

We’ll use these details to respond to your inquiry. Your message is sent securely through our email provider, Resend. Please don’t include sensitive financial information.