# 4 Riverside Avenue, Mastic Beach, NY 11951 > **TL;DR:** 3bd/3ba single family, $799,999 ($513/sqft), built 1955, 1,560 sqft. > Fireplace, Waterfront, View, Hardwood. Est. $4,278/mo. Listed 237 days. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $799,999 | | Price/sqft | $513 | | Bedrooms | 3 | | Bathrooms | 3 full | | Square Feet | 1,560 | | Year Built | 1955 | | Lot Size | 44,431 sqft (1.02 acres) | | Property Type | Single Family (Single Family Residence) | | Status | Active | | Days on Market | 237 | ## Why This Home Stands Out - **Waterfront** - Waterfront location listed - **Views** - Water - **Hardwood Floors** - Hardwood flooring listed ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $4,045 | | Estimated Insurance | $233 | | **Total** | **$4,278** | ## Nearby Schools - **Elementary:** Nathaniel Woodhull Elementary School - **Middle:** William Floyd Middle School - **High:** William Floyd High School ## Key Amenities - Fireplace - Waterfront - View - Hardwood - A/C ## Property Highlights - Built in 1955 - 1.02 acre lot - Fireplace - Waterfront ## Description ### Agent Description Rare opportunity in Mastic Beach. Fully renovated Cape on a private 1+ acre corner lot with river views, modern upgrades throughout, and flexible living space including a possible 4th bedroom or office. Welcome to 4 Riverside Avenue, a beautifully updated home that offers the perfect combination of space, privacy, and modern comfort. This property stands out with its oversized lot, thoughtful renovation, and peaceful natural surroundings. The home features 3 spacious bedrooms, a potential 4th bedroom or office space, and 3 full bathrooms, providing flexibility for today's lifestyle. Natural light fills the home, highlighting the neutral color palette and hardwood floors throughout, creating a warm and inviting atmosphere from the moment you enter. The fully renovated kitchen is designed for both everyday living and entertaining, featuring brand new stainless steel appliances, granite countertops, and custom cabinetry. The bathrooms have been updated with modern tile finishes, adding a fresh and clean design throughout the home. Major upgrades include a new roof (2026), new electric, new fencing, and updated landscaping. The elegant Mountain Black metal roof adds both durability and striking curb appeal. The spacious basement with walkout access provides excellent potential for additional living space. With areas ideal for a bar, cinema room, recreation space, or future finishing, the lower level offers incredible versatility. Outside, the property truly shines. Sitting on over an acre of land, the home features new trees, fresh landscaping, a fenced front yard, and a fenced backyard, creating a peaceful outdoor setting with plenty of room to relax, entertain, or expand. This home offers convenient access to nearby parks, waterfront areas, shopping, and local amenities. If you are looking for a fully renovated, move in ready home with space, privacy, and modern upgrades on a rare oversized lot with river views, this is one you will want to see in person. ## Location - **Address:** 4 Riverside Avenue, Mastic Beach, NY 11951 - **County:** Suffolk County - **Coordinates:** 40.785659, -72.830049 - **Google Maps:** https://www.google.com/maps?q=40.785659,-72.830049 ## Listing Agent - **Name:** Rudy Rodriguez - **Brokerage:** Signature Premier Properties - **Broker Phone:** (631) 673-3700 - **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/4-Riverside-Ave_Mastic-Beach_NY_11951_M98832-68974?f=listhub&s=MLSLINY&m=967520&c=propsimple) ## Photos ![4 Riverside Avenue - Photo 1](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f1899708713r.jpg) ![4 Riverside Avenue - Photo 2](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f1602976577r.jpg) ![4 Riverside Avenue - Photo 3](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f751468356r.jpg) ![4 Riverside Avenue - Photo 4](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f1899456743r.jpg) ![4 Riverside Avenue - Photo 5](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f1532571488r.jpg) ![4 Riverside Avenue - Photo 6](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f1264760076r.jpg) ![4 Riverside Avenue - Photo 7](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f2460232869r.jpg) ![4 Riverside Avenue - Photo 8](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f1804563050r.jpg) ![4 Riverside Avenue - Photo 9](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f2722432788r.jpg) ![4 Riverside Avenue - Photo 10](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f3118696896r.jpg) ![4 Riverside Avenue - Photo 11](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f1641327094r.jpg) ![4 Riverside Avenue - Photo 12](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f484169513r.jpg) ![4 Riverside Avenue - Photo 13](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f2450668750r.jpg) ![4 Riverside Avenue - Photo 14](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f394315829r.jpg) ![4 Riverside Avenue - Photo 15](http://lh.rdcpix.com/7ea865f04089cc20ebc16c5c97e9bcfdl-f343542599r.jpg) --- **MLS#:** 967520 | **Updated:** 2026-10-23 **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://staging.propertysimple.ai/listing/4-riverside-avenue-mastic-beach-ny-11951-260e6b63081843de886546c14650cdad) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://staging.propertysimple.ai/listing/4-riverside-avenue-mastic-beach-ny-11951-260e6b63081843de886546c14650cdad#listing", "url": "https://staging.propertysimple.ai/listing/4-riverside-avenue-mastic-beach-ny-11951-260e6b63081843de886546c14650cdad", "name": "4 Riverside Avenue, Mastic Beach, NY 11951", "description": "Rare opportunity in Mastic Beach. Fully renovated Cape on a private 1+ acre corner lot with river views, modern upgrades throughout, and flexible living space including a possible 4th bedroom or office. 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The elegant Mountain Black metal roof adds both durability and striking curb appeal. The spacious basement with walkout access provides excellent potential for additional living space. With areas ideal for a bar, cinema room, recreation space, or future finishing, the lower level offers incredible versatility. Outside, the property truly shines. Sitting on over an acre of land, the home features new trees, fresh landscaping, a fenced front yard, and a fenced backyard, creating a peaceful outdoor setting with plenty of room to relax, entertain, or expand. This home offers convenient access to nearby parks, waterfront areas, shopping, and local amenities. 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