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$699,999

15 Riverside Ave

Mastic Beach, NY
Active
4
Bedrooms
2.5
Bathrooms
2,364
Square Feet
0.25
Lot Size (acres)
1988
Year Built
10
Days On Market

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

Listing Information

Listing Updated
1 days ago
Listed By
Maralyn C. Diggin CBR · Douglas Elliman Real Estate, 5166812600
MLS#
1059003
Source
OneKey MLS
Status
Active

Open Houses

  • Sunday, October 18
    Remarkable Waterfront Hi Ranch, with direct access to the bay. Mother-daughter possibilities with proper permits. Your Next Sale!
    1:00 PM – 3:00 PM
  • Sunday, October 18
    Remarkably Waterfront Hi ranch offering breathing view, stunning sunsets, and direct access to the bay! Beautifully updated With Mother-daughter capabilities with proper permits.
    1:00 PM – 3:00 PM

Facts & Features

Location

Community Information

Address
15 Riverside Ave, Mastic Beach, NY 11951
City
Mastic Beach
County
Suffolk
Zip Code
11951

Architecture

Bedrooms
4
Bathrooms
2.5
Year Built
1988
Style
Hi Ranch
Construction Materials
Vinyl Siding
Building Area
2,364 sq. ft.
Garage
Yes
Garage Spaces
2
Parking Features
Driveway, Garage

Features & Amenities

Appliances
Dishwasher, Refrigerator
Flooring
Hardwood, Combination
Cooling
Central Air
Heating
Oil

Property Features

Lot Size
0.25 Acres
Lot Features
Waterfront
Water
Public
Sewer
Cesspool
Utilities
Cable Connected, Electricity Connected

Square Footage

Total
2,364 sq. ft.

Tax & Financial Information

List Price
$699,999
Annual Taxes
$8,497

Schools

55/100
Tangier Smith Elementary School
Elementary · Grades KG–05 · 1.4 mi
Assigned school for this home
City
Mastic Beach
Students
728
Student body
38% White · 38% Hispanic / Latino · 16% Black
Free/reduced lunch
59%
Phone
(631) 874-1341
52/100
William Paca Middle School
Middle · Grades 06–08 · 1.3 mi
Assigned school for this home
City
Mastic Beach
Students
1,039
Student body
43% White · 30% Hispanic / Latino · 17% Black
Free/reduced lunch
68%
Phone
(631) 874-1414
75/100
William Floyd High School
High · Grades 09–12 · 1.1 mi
Assigned school for this home
City
Mastic Beach
Students
2,747
Parent reviews
5.0★ avg · 2 reviews
Student body
55% White · 25% Hispanic / Latino · 16% Black
Free/reduced lunch
56%
Phone
(631) 874-1660
78/100
Nathaniel Woodhull Elementary School
Elementary · Grades KG–05 · 1.2 mi
City
Shirley
Students
703
Parent reviews
5.0★ avg · 2 reviews
Student body
49% Hispanic / Latino · 33% White · 10% Black
Free/reduced lunch
54%
Phone
(631) 874-1301
77/100
East Moriches School
Middle · Grades 05–08 · 3.7 mi
City
East Moriches
Students
296
Parent reviews
5.0★ avg · 2 reviews
Student body
75% White · 16% Hispanic / Latino · 4% Black
Free/reduced lunch
19%
Phone
(631) 878-0162
75/100
Moriches Elementary School
Elementary · Grades KG–05 · 1.3 mi
City
Moriches
Students
846
Parent reviews
5.0★ avg · 2 reviews
Student body
52% Hispanic / Latino · 25% White · 14% Black
Free/reduced lunch
58%
Phone
(631) 874-1397
71/100
South Street School
Elementary · Grades PK–02 · 4.8 mi
City
Manorville
Students
250
Parent reviews
5.0★ avg · 2 reviews
Student body
76% White · 18% Hispanic / Latino · 3% Two or More Races
Phone
(631) 801-3143
68/100
Dayton Avenue School
Elementary · Grades 03–06 · 3.7 mi
City
Manorville
Students
459
Parent reviews
5.0★ avg · 2 reviews
Student body
83% White · 12% Hispanic / Latino · 2% Black
Phone
(631) 801-3083

School ratings are provided for informational purposes only and are subject to change. Attendance boundaries are for reference only — contact the school or district directly to verify enrollment eligibility.

Historical Data

Price History

DateEventPrice
10/08/2026Listed for sale$699,999

Listed by Maralyn C. Diggin CBR · Douglas Elliman Real Estate · 5166812600

Listing information 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. Information deemed reliable but not guaranteed by the MLS. The listing broker’s offer of compensation is made only to participants of the MLS where the listing is filed. Copyright 2026, OneKey MLS. All rights reserved.

Last Updated: October 16, 2026 at 3:29 PM | Source: OneKey MLS | MLS#: 1059003

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