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.
For sale
$549,000
13 Riverside Ave, Mastic Beach, NY 11951
3beds
2,340sqft
Single Family Residence
Built in 1972
0.25 Acres Lot
$549,600 Zestimate®
$235/sqft
$-- HOA
What's special
Split-level homeUnbeatable waterfront setting
- 9 days |
- 1,028 |
- 51 |
Likely to sell faster than
Zillow last checked: 8 hours ago
Listing updated: January 31, 2026 at 10:14am
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: 10 days
- Listing agreement: Exclusive Right To Sell
Estimated market value
$549,600
$522,000 - $577,000
$4,281/mo
Price history
Price history
| Date | Event | Price |
|---|---|---|
| 1/27/2026 | Listed for sale | $549,000+3.6%$235/sqft |
Source: eXp Realty #955402 Report a problem | ||
| 10/12/2021 | Sold | $530,000+152.4%$226/sqft |
Source: Public Record Report a problem | ||
| 9/28/2015 | Sold | $210,000$90/sqft |
Source: Public Record Report a problem | ||
Public tax history
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2024 | -- | $2,900 |
| 2023 | -- | $2,900 |
| 2022 | -- | $2,900 |
Find assessor info on the county website
BuyAbility℠ payment
Estimated monthly payment
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Neighborhood: 11951
Nearby schools
GreatSchools rating
- 6/10Nathaniel Woodhull Elementary SchoolGrades: K-5Distance: 1.3 mi
- 4/10William Floyd Middle SchoolGrades: 6-8Distance: 1.8 mi
- 3/10William Floyd High SchoolGrades: 9-12Distance: 1.1 mi
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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