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For sale
  • $549,000

    13 Riverside Ave, Mastic Beach, NY 11951

    3beds
    2,340sqft
    Single Family Residence
    Built in 1972
    0.25 Acres Lot
    $554,600 Zestimate®
    $235/sqft
    $-- HOA

    What's special

    Split-level homeUnbeatable waterfront setting
    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.
    53 days
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    1,962
    |
    56
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    Zillow last checked: 7 hours ago

    Listing updated: March 15, 2026 at 11:40am

    Listing by:

    EXP Realty 888-276-0630,

    Tina Jahrsdoerfer,

    Toni J. Flohr,

    EXP Realty

    Source: eXp Realty,MLS#: 955402Originating MLS: LIBOR

    Tour with a local agent

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 3
      • Bathrooms: 3
      • Full bathrooms: 3
      Heating
      • Baseboard, Hot Water, Oil
      Cooling
      • Wall/Window Unit(s)
      Appliances
      • Included: Gas Oven
      Features
      • First Floor Bedroom, First Floor Full Bath, Eat-in Kitchen, Open Floorplan, Primary Bathroom, Washer/Dryer Hookup
      • Has fireplace: No
      Interior area
      • Total interior livable area: 2,340 sqft

      Property

      Parking
      • Total spaces: 1
      • Parking features: Driveway, Garage
      • Garage spaces: 1
      Features
      • Fencing: Back Yard,Fenced,Vinyl
      • Has view: Yes
      • View description: Water
      • Has water view: Yes
      • Water view: Water
      • Waterfront features: Bulkhead, Creek, River Access, Water Access, Waterfront
      • Frontage length: 100 Feet
      Lot
      • Size: 0.25 Acres
      Details
      • Parcel number: 0200940000500029000

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Split Level
      • Property subtype: Single Family Residence
      Materials
      • Vinyl Siding
      Condition
      • Year built: 1972

      Utilities & green energy

      • Sewer: Cesspool
      • Water: Public
      • Utilities for property: Cable Available, Electricity Connected, Propane, Water Connected

      Community & HOA

      HOA
      • Has HOA: No
      Location
      • Region: Mastic Beach

      Financial & listing details

      • Price per square foot: $235/sqft
      • Tax assessed value: $2,900
      • Annual tax amount: $12,175
      • Date on market: 1/27/2026
      • Cumulative days on market: 54 days
      • Listing agreement: Exclusive Right To Sell

        Estimated market value

        $554,600

        $527,000 - $582,000

        $4,370/mo

        Price history

        Price history
        DateEventPrice
        1/27/2026Listed for sale$549,000+3.6%$235/sqft
        Source: eXp Realty #955402 Report a problem
        10/12/2021Sold$530,000+152.4%$226/sqft
        Source: Public Record Report a problem
        9/28/2015Sold$210,000$90/sqft
        Source: Public Record Report a problem

        Public tax history

        Public tax history
        YearProperty taxesTax assessment
        2024-- $2,900
        2023-- $2,900
        2022-- $2,900
        2021-- $2,900
        2020-- $2,900
        2019-- $2,900
        2018-- $2,900

        Find assessor info on the county website

        BuyAbility℠ payment

        Estimated monthly payment
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
        See how much you could borrow to make a competitive offer.

        Boost your down payment with 6% savings match

        Earn up to a 6% match & get a competitive APY with a *. Zillow has partnered with to help get you home faster.

        Learn more*Terms apply. Match provided by Foyer. Account offered by Pacific West Bank, Member FDIC.

        Climate risks

        Neighborhood: 11951

        Getting around

        4 / 100
        Car-Dependent
        27 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating
        Schools provided by the listing agent
        • Elementary: Tangier Smith Elementary School
        • Middle: William Paca Middle School
        • High: William Floyd High School
        • District: William Floyd

        Source: eXp Realty. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

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