• Primary Photo - 21 Walnut Ave
  • Primary Photo - 21 Walnut Ave
$4,350 / Month

21 Walnut Ave

,

Stony Brook, NY 11790

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516-603-6662

  • Bedrooms

    4

  • Bathrooms

    2

  • Square Feet

    1,788 sq ft

  • Available

    Available Aug 15

Highlight

  • Smoke Free
21 Walnut Ave
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About This Home

$4,350 deposit, Available Aug 15

Charming 4-bedroom,2-bath Cape in the highly desirable Three Village School District. Features a spacious layout,private backyard,and convenient location near Stony Brook University,shopping,restaurants,parks,the LIRR,and major highways MLS ID KEY1025436 Based on information submitted to the MLS GRID as of [see last changed date above]. 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. Some IDX listings have been excluded from this website. Prices displayed on all Sold listings are the Last Known Listing Price and may not be the actual selling price.

21 Walnut Ave is a house located in Suffolk County and the 11790 ZIP Code.

* Price shown is base rent. Excludes user-selected optional fees and variable or usage-based fees and required charges due at or prior to move-in or at move-out. Price, availability, fees, and any applicable rent special are subject to change without notice.
* Square footage definitions vary. Displayed square footage is approximate.

Fees and Policies

The fees listed below are community-provided and may exclude utilities or add-ons. All payments are made directly to the property and are non-refundable unless otherwise specified. Use the Cost Calculator to determine costs based on your needs.

  • One-Time Basics
    • Security Deposit - Refundable
      $4,350

Property Fee Disclaimer: Based on community-supplied data and independent market research. Subject to change without notice. May exclude fees for mandatory or optional services and usage-based utilities.

House Features

  • Air Conditioning
  • Smoke Free

Contact

  • Listed by Haluk J. Yavas | EMLAK Realty LLC
  • Phone Number
  • Contact
  • Source
    OneKey® MLS
Information Copyright 2026, OneKey® MLS. All Rights Reserved. The source of the displayed data is either the property owner or public record provided by non-governmental third parties. It is believed to be reliable but not guaranteed. This information is provided exclusively for consumers’ personal, non-commercial use. The data relating to real estate for sale on this website comes in part from the IDX Program of OneKey® MLS.
Location Get Directions
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Edit Commute

Under 30 minutes

Commute Time is calculated at rush hour.
City - Stony Brook

Situated on Long Island’s North Shore, Stony Brook is a scenic community brimming with dynamic appeal. Stony Brook’s charming harbor rests along the Smithtown Bay, offering sweeping waterfront vistas and ample opportunities for outdoor recreation. Among Stony Brook’s many additional outdoor destinations are Avalon Park and Preserve, West Meadow Wetlands Reserve, and Sand Street Beach.

Stony Brook is also home to Stony Brook University, which provides the community with plenty of cultural and educational opportunities. However, Stony Brook is more than just a college town. Residents love the community’s historic character, exceptional schools, and waterfront access along with its overall tranquil atmosphere. Stony Brook is also convenient to excellent shopping at Smith Haven Mall.

Learn more about living in Stony Brook 
Amenities
  • Air Conditioning
  • Smoke Free
Education
Colleges & Universities Distance
Colleges & Universities Distance
Stony Brook University
Drive: 7 min 3.0 mi
SUNY Suffolk Co., Ammerman
Drive: 17 min 9.2 mi
SUNY Suffolk Co., Grant Campus
Drive: 27 min 13.4 mi
Touro University
Drive: 27 min 13.7 mi
21 Walnut Ave is within 7 minutes or 3.0 miles from Stony Brook University. It is also near SUNY Suffolk Co., Ammerman and Touro University.
Transportation

21 Walnut Ave is near Long Island MacArthur, located 12.9 miles or 28 minutes away, and Tweed/New Haven, located 44.4 miles or 121 minutes away.

Commuter Rail Distance
Commuter Rail Distance
Stony Brook Station
Drive: 9 min 3.6 mi
St James Station
Drive: 10 min 3.7 mi
Port Jefferson Station
Drive: 12 min 5.7 mi
Smithtown Station
Drive: 14 min 6.6 mi
Kings Park Station
Drive: 21 min 10.2 mi
Airports Distance
Airports Distance
Long Island MacArthur
 Drive: 28 min 12.9 mi
Tweed/New Haven
 Drive: 121 min 44.4 mi
Getting Around
Fairly Walkable
Walkability
40 / 100
Some Public Transit
Transit
50 / 100
Moderately Drivable
Drivability
70 / 100
Moderately Bikeable
Bikeability
60 / 100

Scores provided by

What do Walkability, Transit, Drivability, and Bikeability mean? Walkability measures the walking distance to day-to-day needs. Transit measures access to public transportation. Drivability measures congestion, parking availability, and access to major roads. Bikeability measures the suitability for cycling. How It Works
-
Soundscore™
- / 100

Traffic

-

Airport

-

Businesses

-

Scores provided by

HowLoud What is a Sound Score Rating? A Sound Score Rating aggregates noise caused by vehicle traffic, airplane traffic and local sources. How It Works
Points of Interest

Time and distance from 21 Walnut Ave.

Shopping Centers Distance
Shopping Centers Distance
Stony Brook Square
Walk: 13 min 0.7 mi
Stony Brook Village Shopping Center
Walk: 15 min 0.8 mi
15 Bennetts Rd
Drive: 4 min 1.4 mi
21 Walnut Ave has 3 shopping centers within 1.4 miles, which is about a 4-minute drive. The miles and minutes will be for the farthest away property.
Parks and Recreation Distance
Parks and Recreation Distance
Sweetbriar Nature Center
 Drive: 15 min 6.8 mi
Lake Ronkonkoma
 Drive: 18 min 8.0 mi
Caleb Smith State Park Preserve
 Drive: 16 min 8.0 mi
Nissequogue River State Park
 Drive: 23 min 10.1 mi
Sunken Meadow State Park
 Drive: 24 min 12.4 mi
21 Walnut Ave has 5 parks within 12.4 miles, including Sweetbriar Nature Center, Lake Ronkonkoma, and Caleb Smith State Park Preserve.
Hospitals Distance
Hospitals Distance
St. Charles Hospital
Drive: 10 min 5.1 mi
John T. Mather Memorial Hospital of Port Jefferson
Drive: 11 min 5.6 mi
St. Catherine of Siena Hospital
Drive: 16 min 8.2 mi
21 Walnut Ave has 3 hospitals within 8.2 miles, the nearest is St. Charles Hospital which is 5.1 miles away and a 10 minute drive.
Military Bases Distance
Military Bases Distance
Eatons Neck CG Station North
Drive: 46 min 22.0 mi
Fort Totten US Govt Reservation
Drive: 66 min 42.9 mi
US Coast Guard Heliport
Drive: 93 min 59.7 mi
21 Walnut Ave has 3 military bases within 59.7 miles, the nearest is Eatons Neck CG Station North which is 22.0 miles away and a 46 minute drive.

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