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Active

15 Riverside Avenue

Mastic Beach, NY, 11951

$699,999
4Bedrooms
3Bathrooms
2,364Interior sq ft
0.25Acres
1988Year built

AN INTRODUCTION

A closer look.

Breathtaking waterfront views and peaceful sunsets set the stage for this updated 4 Bedroom, 2.5 Bath Hi-Ranch on Poospatuck Creek, with direct access to the bay. The first level features updated flooring, Led lighting, summer kitchen, spacious living room, bedroom, ample storage and sliders to the deck, Cathedral ceilings and hardwood floors create a bright and open feel. This Main level offers two generously sized bedrooms, and a spacious primary with walk in closet and half bath. The remodeled kitchen features quartz countertops, while the living room with fireplace and an oversized picture window showcases the yard and water views. Sliders lead to the upper deck, the perfect place to relax, unwind and savor those spectacular sunsets. Outside the home shines while you enjoy your private dock and a place to launch kayaks and paddleboat. From Poospatuck head to the bay for a day of fishing or simply enjoying life on the water. NEW : 2025/2026 Trex decking on Upper and Lower Level, New Oil tank, New Gutters And Gutter guards

Property overview

Property type
Single Family Residence
Architecture
Hi Ranch
Condition
Updated/Remodeled
Year built
1988
Lot size (sq ft)
10,890
Status
Active
Listed
2026-10-13
MLS number
KEY1059003

Interior & comfort

Interior features
First Floor Bedroom, First Floor Full Bath
Appliances
Dishwasher, Refrigerator
Heating
Oil
Cooling
Central Air

Outdoors & amenities

Parking
Driveway, Garage
Garage spaces
2
Waterfront
Canal Access, Creek, Water Access, Waterfront

Schools & location

Postal town
Mastic Beach
County
Suffolk County
School district
William Floyd
Elementary school
Tangier Smith Elementary School
Middle school
William Paca Middle School
High school
William Floyd High School

Taxes & utilities

Annual property taxes
$8,497
Tax year
2026
Association
No
Water
Public
Sewer
Cesspool

Listing courtesy of Douglas Elliman Real Estate · 516-681-2600
MLS #KEY1059003 · Active

LET’S CONNECT

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