# 13 Riverside Avenue, Mastic Beach, NY 11951

> **TL;DR:** 3bd/3ba single family, $549,000 ($235/sqft), built 1972, 2,340 sqft.
> Waterfront, View, A/C. Est. $2,379/mo. Listed 129 days.

## Property at a Glance

| Attribute | Value |
|-----------|-------|
| Price | $549,000 |
| Price/sqft | $235 |
| Bedrooms | 3 |
| Bathrooms | 3 full |
| Square Feet | 2,340 |
| Year Built | 1972 |
| Lot Size | 10,890 sqft (0.25 acres) |
| Stories | 2 |
| Property Type | Single Family (Single Family Residence) |
| Status | For Sale |
| Days on Market | 129 |

## Why This Home Stands Out

- **Waterfront** - Direct water access
- **Views** - Water

## Estimated Monthly Costs

| Category | Amount |
|----------|--------|
| Mortgage (20% down, 6.5%) | $2,379 |
| **Total** | **$2,379** |

## Nearby Schools

- **Elementary:** Tangier Smith Elementary School
- **Middle:** William Paca Middle School
- **High:** William Floyd High School

## Key Amenities

- Waterfront
- View
- A/C

## Property Highlights

- Built in 1972
- 0.25 acre lot
- 2 stories
- Waterfront

## Description

### Agent 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.

## Location

- **Address:** 13 Riverside Avenue, Mastic Beach, NY 11951
- **County:** Suffolk County
- **Coordinates:** 40.786352, -72.83074
- **Google Maps:** https://www.google.com/maps?q=40.786352,-72.83074

## Listing Agent

- **Name:** Tina Jahrsdoerfer
- **Brokerage:** EXP Realty
- **Phone:** 6313654231
- **Email:** tinaj@soldbytinaj.com

## Primary Photo

![13 Riverside Avenue - Primary Photo](http://lh.rdcpix.com/f100d38b406b4879f76c3233b8ad5c79l-f3956836649r.jpg)

*30 total photos available on [listing page](https://www.propertysimple.com/listing/13-riverside-avenue-mastic-beach-ny-11951-y955402)*

---

**MLS#:** 955402 | **Updated:** 2026-06-18
**Source:** listhub

*Copyright © 2026 OneKey MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.*

[View on PropertySimple](https://www.propertysimple.com/listing/13-riverside-avenue-mastic-beach-ny-11951-y955402)

---

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