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$949,999
New Listing

4 Riverside Avenue
Mastic Beach, NY 11951

For Sale|Single Family Residence|Active
3
Beds
3
Total Baths
3
Full Baths
1,560
SqFt
$609
/SqFt
1955
Built
County:
Suffolk
Listing courtesy of Signature Premier Properties rrodriguez@signaturepremier.com
4 Riverside Avenue4 Riverside Avenue4 Riverside Avenue4 Riverside Avenue
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Monthly Payment (Est.)

$4,334
Calculator powered by Showcase IDX, a Constellation1 Company. Copyright ©2026 Information is deemed reliable but not guaranteed.

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.

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Listing Snapshot
Price 
$949,999
Days On Site 
0 Days
Bedrooms 
3
Inside Area (SqFt) 
1,560 sqft
Total Baths 
3
Full Baths 
3
Partial Baths 
N/A
Lot Size 
1.02 Acres
Year Built 
1955
MLS® Number 
967520
Status 
Active
Property Tax 
$8,602.14
HOA/Condo/Coop Fees 
N/A
Sq Ft Source 
N/A
Friends & Family
Recent Activity
2 hours agoListing first seen on site
2 hours agoListing updated with changes from the MLS®
General Features
Acres 
1.02
Parking 
DrivewayOversizedPrivate
Property Condition 
Updated/Remodeled
Property Sub Type 
Single Family Residence
Sewer 
Cesspool
SqFt Total 
1560
Style 
Cape Cod
Utilities 
Cable AvailableCable ConnectedElectricity AvailableElectricity ConnectedSee RemarksWater AvailableWater Connected
Water Source 
Public
Interior Features
Appliances 
DishwasherElectric RangeElectric Water HeaterENERGY STAR Qualified AppliancesMicrowave
Basement 
FullWalk-Out Access
Cooling 
ElectricENERGY STAR Qualified EquipmentMulti UnitsWall/Window Unit(s)Zoned
Fireplace 
Yes
Fireplace Features 
Wood Burning
Flooring 
Hardwood
Heating 
ElectricENERGY STAR Qualified Equipment
Interior 
Crown MoldingOpen FloorplanWalk-In Closet(s)
Laundry Features 
Laundry Room
Window Features 
Bay Window(s)Double Pane WindowsENERGY STAR Qualified WindowsScreens
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Exterior Features
Construction Details 
Brick
View 
Water
Waterfront Features 
River AccessRiver Front
Waterview 
Water
Windows/Doors 
Bay Window(s)Double Pane WindowsENERGY STAR Qualified WindowsScreens
Community Features
School District 
William Floyd
Schools
School District
William Floyd
Elementary School
Nathaniel Woodhull Elementary School
Middle School
William Floyd Middle School
High School
William Floyd High School
Listing courtesy of Signature Premier Properties rrodriguez@signaturepremier.com


Based on information submitted to the MLS GRID as of 2026-03-04 05:27 PM EST. 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.

Neighborhood & Commute
Source: Walkscore
Disclosure: Community information and market data powered by Constellation Data Labs. Information is deemed reliable but not guaranteed.
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