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    1 home
      1 home available
      13 Riverside Avenue, Mastic Beach, NY 11951
      NEW 6 hrs agoOpen Sat 11:00 AM-1:00 PM
      13 Riverside Avenue, Mastic Beach, NY 11951
      $549,000
      3beds
      3bath
      2,340sqft
      0.25acres
      House for Sale

      13 Riverside Avenue, Mastic Beach, NY 11951

      Listing by: EXP Realty
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      Copyright © 2026 OneKey® MLS LLC
      Display of MLS Data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals.
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      OneKey® MLS
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      13 Riverside Avenue, Mastic Beach, NY 11951
      NEW 6 hrs ago
      Open Sat 11:00 AM-1:00 PM
      $549,000
      3beds
      3full,half bath
      2,340sqft
      0.25acres

      13 Riverside Avenue, Mastic Beach, NY 11951

      City/Town:Mastic Beach   Post Office: Mastic Beach     

      House for Sale by Tina JahrsdoerferEXP Realty.

      Data checked -. Listing last updated 6 hours ago.
      1. Overview
      2. Details
      3. More 

      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.

      Internet Serviceability
      Details
        Property type
      Residential
        Year built
      1972
        Heating
      Baseboard, Hot Water, Oil
        Cooling
      Wall/Window Unit(s)
        Total rooms
      10
        Garage
      Yes (1 space)
        City/Town
      Mastic Beach
        Post Office
      Mastic Beach
        Parking spots
      -
      955402
      MLS ID
      Active
      Status
      01/27/2026
      On Market Date
        Laundry features
        Flooring
        Fireplace
      No
        Pets allowed
        Architectural Style
      Split Level
        Basement
        View
      Water
      Interior features
      First Floor Bedroom, First Floor Full Bath, Eat-in Kitchen, Open Floorplan, Primary Bathroom, Washer/Dryer Hookup
      Exterior features
      Lot features
      Appliances included
      Gas Oven
      Construction materials
      Vinyl Siding
      Monthly taxes
      $1,015
      Yearly taxes
      $12,175.4
      Community Features
      -
      School district
      William Floyd
      Schools
      Tangier Smith Elementary School, William Paca Middle School, William Floyd High School
      Senior community
      No
      Common Charges
      -
      Maintenance
      -
      Additional Fees
      -
      Open Houses
      In-Person
      Sat, Jan 31
      11:00 AM - 01:00 PM
      Eastern Time
      Virtual
      No upcoming virtual open houses
      Contact Agent
      Listing By:
      Tina Jahrsdoerfer
      Tina Jahrsdoerfer
      Toni J. Flohr
      Toni J. Flohr
      Tina Jahrsdoerfer
      Tina Jahrsdoerfer
      Real Estate Salesperson, EXP Realty
      Direct Number 
       
      Toni J. Flohr
      Toni J. Flohr
      Real Estate Salesperson, EXP Realty
      Direct Number 
       
      Location
      For Sale Nearby
      No nearby homes are For Sale Nearby.
      Recently Sold
      No nearby homes have been Recently Sold.
      13 Riverside Avenue, Mastic Beach, NY 11951, is a 3 bedroom, 3 bathroom, 2340 sqft. Single Family Residence built in 1972. This property is currently available for sale and was listed on OneKey® MLS on 1-27-2026. The MLS# for this Single Family Residence is MLS# 955402.
      Display of MLS Data is usually deemed reliable but is NOT guaranteed accurate by the MLS. Buyers are responsible for verifying the accuracy of all information and should investigate the data themselves or retain appropriate professionals.
      Copyright ©2026