13 Riverside Ave

Mastic Beach, NY 11951

$549,000
Price
3
Beds
2,340 Sq. Ft.
$235 / Sq. Ft.
2,340
Sq. Ft.
$235
per Sq. Ft.
Open: 1/31 11:00AM - 01:00PM
Open: 1/31 11:00AM - 01:00PM

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,...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.
  1. Listed by Tina Jahrsdoerfer • EXP Realty
    P: (888)-276-0630 C: (631)-365-4231 tinaj@soldbytinaj.com
  2. Listed by Toni J. Flohr • EXP Realty
    P: (888)-276-0630 C: (516)-901-6426 toni@flohreverhomes.com

Property Details for 13 Riverside Avenue

City/Township
Brookhaven
View
Water
Architectural Style
Split Level
Garage Spaces
1.00
Waterfront
Yes
Section Area
Biltmore Drive

Open Houses

Saturday, Jan 31st

11:00 AM - 1:00 PM

Public

LISTING UPDATED: 01/28/2026 05:03 AM

Property Details for 13 Riverside Avenue

StatusActive
MLS #955402
Days on Market2
Taxes$12,175 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeSingle Family
Year Built1972
Lot Size0.25 AC / 10,890 SF
CountySuffolk County

Location

Listing Courtesy of EXP Realty, Tina Jahrsdoerfer; EXP Realty, Toni J. Flohr
Add your commute

Building Information for 13 Riverside Avenue

Stories-Year Built1972Building Size-Lot Size0.25 AC / 10,890 SF

Payment Calculator

$3,690 per month

30 year fixed, 6.15% Interest

Principal and Interest

$2,676

Property Taxes

$1,015

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 13 Riverside Avenue

Summary
Location and General Information
  • Senior Community YN: No
  • Property Attached: No
  • Structure Type: false
  • Frontage Length: 100 Feet
  • State Or Province: NY
School Information
  • School District: William Floyd
  • Elementary School District: William Floyd
  • Elementary School: Tangier Smith Elementary School
  • Middle Or Junior School District: William Floyd
  • Middle Or Junior School: William Paca Middle School
  • High School District: William Floyd
  • High School: William Floyd High School
Rental
Rental
  • Lease Considered: No
Unit Information
Unit Information
  • Building Units Total: 1
Taxes and HOA Information
Taxes and HOA Information
  • Parcel Number: 0200-940-00-05-00-029-000
  • Tax Assessed Value: $2,900.00
  • Association: No
Interior and Exterior Features
Interior Features
  • Amenities: 1st Floor Bedrm, Back Yard, Bulkhead, Creek, Eat in Kitchen, Fenced, First Floor Full Bath, Open Floorplan, Primary Bathroom, Public, River Access, Split Level, Vinyl, Washer/Dryer Hookup, Water Access, Water View, Waterfront
  • Interior Features: First Floor Bedroom, First Floor Full Bath, Eat-in Kitchen, Open Floorplan, Primary Bathroom, Washer/Dryer Hookup
  • Appliances: Gas Oven
  • Number Of Kitchens: 1.0
  • Total Rooms: 10
  • Attic Description: Full,Pull Stairs
  • Fireplace: No
  • Location Amenities: Fenced, Fenced Yard, 1st Fl Master Bedroom, Eat in Kitchen, WD Hookup, Water View, Water Access
  • Living Area: 2,340.00
  • Basement: No
Exterior Features
  • Exterior Property Features: Driveway, Garage, Back Yard, Fenced, Vinyl
  • Elevation Certificate: No
  • Fencing: Back Yard,Fenced,Vinyl
  • Construction Materials: Vinyl Siding
  • Waterfront Features: Bulkhead, Creek, River Access, Water Access, Waterfront
  • Pool Private: No
Lot Information
  • Building Area Units: Square Feet
Parking
  • Parking Features: Driveway, Garage
  • Garage: Yes
  • Carport: No
Utilities
  • Cooling: Wall/Window Unit(s)
  • Heating: Baseboard, Hot Water, Oil
  • Heat Fuel Type: Baseboard, Hot Water, Oil
  • Number Of Heating Zones: 2
  • Sewer: Cesspool
  • Water Source: Public
  • Utilities: Cable Available, Electricity Connected, Propane, Trash Collection Public, Water Connected
Green Features
  • Green Features: Gas Oven, Baseboard, Hot Water, Oil
Agent
Payment and Rate
  • Down Payment Resource: Yes

Property History for 13 Riverside Avenue

DateEvent & SourcePriceAppreciation
Sep 11, 2015

Sold (Public Record)

Public Record #560775785

$210,000

+14.1% / yr

Jul 2, 2008

Sold (Public Record)

Public Record #251608328

$81,250—
DateEvent & SourcePrice
09/11/2015

Sold (Public Record)

Public Record #560775785

$210,000

+14.1% / yr

07/02/2008

Sold (Public Record)

Public Record #251608328

$81,250

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 13 Riverside Avenue

Taxable ValueLand$150Additions$2,750Total$2,900
Home Facts
Beds0Lot Size10,890 SqFtStyleSingle Family ResidenceCountySUFFOLKAPN0200-940.00-05.00-029.000

Schools near 13 Riverside Avenue

This home is within William Floyd Union Free School District.
Rating
School
Type
Grades
Distance
Tangier Smith Elementary School
Public - K to 5
William Paca Middle School
Public - 6 to 8
William Floyd High School
Public - 9 to 12
William Floyd Learning Center
Public - K to 5
Rating
School
Distance
Tangier Smith Elementary School
PublicK to 5

William Paca Middle School
Public6 to 8

William Floyd High School
Public9 to 12

William Floyd Learning Center
PublicK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 13 Riverside Avenue, Mastic Beach, NY 11951

13 Riverside Avenue is a single family home for sale in Mastic Beach, NY 11951. This property was listed for sale on January 27, 2026 by EXP Realty, it's currently listed at $549,000. It has been on the market for a total of 2 days and was last sold on September 11, 2015. This listing's school district is William Floyd Union Free School District. Nearby schools include Tangier Smith Elementary School, William Paca Middle School and William Floyd High School. 13 Riverside Avenue is a 3-bed, 3-bath, 2,340 sqft single family home built in 1972.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity. Subject to change at any time. Compass makes no guarantee, warranty or representation regarding the accuracy of any waterfront feature, water view or waterfront view.

Listing Courtesy of EXP Realty, Tina Jahrsdoerfer; EXP Realty, Toni J. Flohr

Based on information submitted to the MLS GRID as of 01/28/2026 05:03 AM. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Properties displayed may be listed or sold by various participants in the MLS. IDX information is provided exclusively 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. The data is deemed reliable but is not guaranteed by MLS GRID. Use of the MLS GRID data may be subject to an end user license agreement prescribed by the applicable MLS of the Member Participant, if any, and as amended from time to time.