David E. Cornwell
Licensed Real Estate Salesperson
REALTOR®
Walton, NY
Office: (607) 865-7000 (607) 437-8941

13 Riverside Avenue , Mastic Beach, NY 11951

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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.

13 Riverside Avenue | MLS# 955402

This single family home located at 13 Riverside Avenue , Mastic Beach, NY 11951 is currently listed for sale with an asking price of $549,000. This property was built in 1972 and has 3 bedrooms and 3 full baths with 2340 sq. ft. Riverside Avenue is located within the William Floyd school district. Search Mastic Beach real estate on david-cornwell.timberlandproperties.com today.

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Property Features

Property Type: Residential - Single Family
Cooling: Wall/Window Unit(s)
Fenced: Yes
Garage: 1
Heating: Baseboard, Hot Water, Oil
Home Style: Split Level
Lot Size: 0.25 Acres
Taxes: $12,175
Year Built: 1972

Amenities

First Floor Bedroom
First Floor Full Bath
Eat-in Kitchen
Open Floorplan
Primary Bathroom
Washer/Dryer Hookup

Feature Descriptions

Appliances: Gas Oven
Attic: Full, Pull Stairs
Days on Site: 35
Exterior: Vinyl Siding
Fencing: Back Yard, Fenced, Vinyl
Frontage: 100 Feet
GarageY/N: Yes
Heating Zones: 2
Number Of Kitchens: 1
On Market Date: 2026-01-27
Parcel Number: 0200-940-00-05-00-029-000
Parking Features: Driveway, Garage
Rental Term: Monthly
Rooms Total: 10
Sewer: Cesspool
Special View Info: Water
Utilities: Cable Available, Electricity Connected, Propane, Trash Collection Public, Water Connected
Water: Public
Waterfront Features: Bulkhead, Creek, River Access, Water Access, Waterfront

Local Schools

High School: William Floyd High School
Middle School: William Paca Middle School
Elementary School: Tangier Smith Elementary School
School District: William Floyd

Estimate Your Payment

Estimated Payment

$ 2,396.54 per month $1,221.84 Principal & Interest $1,014.58 Property Tax $160.13 Homeowner's Insurance

Change Payment Information

%
years/fixed
yearly
yearly (est.)
(Payments are an estimate and may vary by lender)

Demographics

Listed By / Shown By

Listing By

Agency Name: EXP Realty
Agency Contact: 888-276-0630

Shown By

Agent Name: David E. Cornwell
Agent Phone: (607) 437-8941
Agency Title: Timberland Properties

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All information is deemed reliable but not guaranteed. All properties are subject to prior sale, change, or withdrawal. Neither broker(s), nor agent(s) shall be responsible for any typographical errors, misinformation, or misprints, and shall be held totally harmless. Disclaimer: All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided 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 on this site was last updated 03/03/2026. The listing information on this page last changed on 03/03/2026. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of Delta Media Group MLS (last updated Tue 03/03/2026 1:11:47 AM EST) or Global MLS (last updated Tue 03/03/2026 1:06:55 AM EST) or New York State Alliance MLS (last updated Tue 03/03/2026 1:10:29 AM EST) or Hudson Valley Catskill Region MLS (last updated Tue 03/03/2026 12:11:14 AM EST) or OneKey MLS (last updated Tue 03/03/2026 1:10:05 AM EST). Real estate listings held by brokerage firms other than Timberland Properties may be marked with the Internet Data Exchange logo and detailed information about those properties will include the name of the listing broker(s) when required by the MLS. All rights reserved.

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