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$549,000
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Property Description
Waterfront living with endless potential on Poospatuck Creek, offering direct access to the Forge River and beyond. This split-level home is all about location, views, and opportunity. The upper level features an open floor plan designed to capture the water from every angle, with three sliding glass doors that open to a sprawling upper deck, perfect for entertaining, relaxing, and soaking in the scenery. Enjoy 100 feet of bulkhead and your own private dock, ideal for boating, kayaking, paddle boarding, or simply enjoying life on the water. Wake up to stunning sunrises and wind down with peaceful sunsets reflected across the creek. This setting delivers true waterfront serenity. The home offers two additional rooms with flexible use, ideal for a home office, gym, game room, or creative space. Buyers may also choose to add wardrobes to use these rooms as additional sleeping areas. The lower level includes exterior entrances, creating excellent potential for a guest suite or accessory apartment with proper permits. Whether you envision multigenerational living, rental income, or flexible work-from-home space, the layout supports a variety of possibilities This home offers a fantastic opportunity for buyers ready to bring their vision and create a custom waterfront retreat tailored to their style. With an unbeatable waterfront setting, this is a rare chance to own property with direct access to the Forge River and the Great South Bay.
Full Property Details
Full Property Details for 13 Riverside Ave
General
- Price: $549,000
- Taxes: $12,175
- Status: Active
- Type: Single Family
- Source: Long_Island
- MLS ID: 955402
- Updated: 1/27/2026
- Added to Site: 29 day(s) ago
Interior
- Number of Rooms: 10
- Interior Features: First Floor Bedroom, First Floor Full Bath, Eat-in Kitchen, Open Floorplan, Primary Bathroom, Washer/Dryer Hookup
- Appliances: Gas Oven
Rooms
Bathrooms
- Total Bathrooms: 3
- Full Bathrooms: 3
Bedrooms
- Total Bedrooms: 3
Parking
- Garage: Yes
- Garage Spaces: 1
- Parking Features: Driveway, Garage
Location
- County: Suffolk County
- Cross Streets: Biltmore Drive
School Information
- High School District: William Floyd
- Elementary School: Tangier Smith Elementary School
- Middle School: William Paca Middle School
- High School: William Floyd High School
Heating & Cooling
- Cooling Type: Wall/Window Unit(s)
- Heating Type: Baseboard, Hot Water, Oil
- Heating Zones: 2
Utilities
- Sewer: Cesspool
- Water: Public
- Utility Description: Cable Available, Electricity Connected, Propane, Trash Collection Public, Water Connected
Structural Information
- Architectural Style: Split Level
- Detached/Attached: Detached
- Construction: Vinyl Siding
- Sq. Ft. Source: Other
- Year Built: 1972
Lot Features
- Property View: Water
- Lot Size (Acres): 0.25
- Lot Size (Sq. Ft.): 10,890
- Frontage Feet: 100 Feet
- Fence: Yes
- Fencing (Description): Back Yard, Fenced, Vinyl
Water Features
- Water Front: Yes
- Water View: Yes
- Water Front View: Bulkhead, Creek, River Access, Water Access, Waterfront
Financial Considerations
- Tax Amount: $12,175.4
Disclosures and Reports
- Special Conditions: None
- Property ID: 0200-940-00-05-00-029-000
Listed by EXP Realty
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Schools
Schools serving 13 Riverside Ave
School District:William Floyd Union Free School District
| Name | Grades | Distance |
|---|---|---|
Nathaniel Woodhull Elementary School 6 Francis Landau Place, Shirley, NY 11967 | K-5 | 1.3 mi |
William Floyd Middle School 630 Moriches-Middle Island Road, Moriches, NY 11955 | 6-8 | 1.8 mi |
William Floyd High School 240 Mastic Beach Road, Mastic Beach, NY 11951 | 9-12 | 1.1 mi |
Disclaimer:
School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 13 Riverside Ave
Date
Details
Price
Change
Source
1/27/2026
Listed
$549,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Tax History
Tax History for 13 Riverside Ave
Year
Property Taxes
Change
Tax Assessment
Change
2020
100%
$2,900
—
2022
100%
$2,900
—
2021
-100%
$2,900
—
2020
$13,123
2%
$2,900
—
2018
$12,846
2%
$2,900
—
2017
$12,613
43%
$2,900
—
2016
$8,841
2%
$2,900
—
2015
$8,641
3%
$2,900
—
2015
$8,370
2%
$2,900
—
2014
$8,192
4%
$2,900
—
2013
$7,880
—
$2,900
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 13 Riverside Ave
13 Riverside Avenue, Mastic Beach, NY 11951 (MLS# 955402) is a Single Family property with 3 bedrooms and 3 full bathrooms. 13 Riverside Avenue is currently listed for $549,000 and was received on January 27, 2026. Want to learn more about 13 Riverside Avenue? Do you have questions about finding other Single Family real estate for sale in Mastic Beach? You can browse all Mastic Beach real estate or contact a Coldwell Banker agent to request more information.
