15 Riverside Ave
Mastic Beach, NY 11951
For more information on this listing, contact us at: (914) 438-5975
Active
$699,999
15 Riverside Ave Mastic Beach, NY 11951
Single Family Residence
Property Type
4
Beds
2 Full 1 Half
Baths
2,364
Sq. Ft.
1988
Year Built
Suffolk
County
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
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
MLS #
1059003
Monthly Fees
N/A
On Site
10 Days
Last Updated
10/18/2026
Location
Contact Agent
Ruth Garcia
(914) 438-5975Property Details
Community Information
School Information
School District
William Floyd
High School
William Floyd High School
Middle School
William Paca Middle School
Elementary School
Tangier Smith Elementary School
Architecture
Bedrooms
4
Bathrooms
2 Full / 1 Half
Year Built
1988
Style
Hi Ranch
Construction Materials
Vinyl Siding
Garage Spaces
2
Features / Amenities
Interior Features
1st fl Master Bedroom, First Floor Full Bath
Appliances
Dishwasher, Refrigerator
Flooring
Combination, Hardwood
Parking Features
Driveway, Garage
Cooling
Central Air
Heating
Oil
Total Rooms
8
Property Features
Lot Size
10,890 Sq. Ft. / 0.25 Acres
Waterfront
Canal Access, Creek, Water Access, Waterfront
Property Attached
Yes
Utilities
Cable Connected, Electricity Connected, Trash Collection Public
Sewer
Cesspool
Water
Public
Tax and Financial Info
Tax Year
2026
Tax Annual Amount
$8,497.42
Rooms
| Level | Description | |
| Bedroom 1 | First | Summer Kitchen,LivingRoom, Bedroom,Full Bath, Great Space for Mom, Sliders to Deck |
| Primary Bedroom | Second | Living room with fireplace, Remodeled Kitchen with Quartz counters, Primary Bedroom with .5 Bath and Walk in Closets, 2 Large Bedrooms |
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Listing provided courtesy of Douglas Elliman Real Estate (516-681-2600).
Listings courtesy of Onekey MLS as distributed by MLS GRID.
Based on information submitted to the MLS GRID as of October 22, 2026 12:30 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.
Properties displayed may be listed or sold by various participants in the MLS,” as established by the applicable MLS Governing Documents.
Properties displayed may be listed or sold by various participants in the MLS,” as established by the applicable MLS Governing Documents.
