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21 Walnut Avenue, Stony Brook, NY 11790

Suffolk County

Key Facts

5Beds
3Baths
1,788Sq Ft
1975Year Built
0.11Lot (acres)

Description

Discover the perfect blend of comfort and convenience in this newly renovated 5-bedroom, 3-bath apartment located in the heart of Stony Brook. Just minutes from Stony Brook University, Stony Brook Hospital, and public transportation, The modern design features fresh finishes and updated appliances, creating a welcoming and stylish living space with family room and dining room. Plus, the landlord covers landscaping, so you can enjoy a beautifully maintained yard without lifting a finger.

Property Information

Property Type

Residential Lease

Sub-Type

Single Family Residence

Style

Cape Cod

Year Built

1975

Living Area

1,788 sq ft

Lot Size

0.11 acres

Days on Market

4

MLS® Listing#

1025436

Property Features

Interior

Eat-in KitchenEntrance FoyerMaster Downstairs

Appliances

DishwasherMicrowaveRefrigeratorWasher

Cooling

Central AirDuctless

Heating

BaseboardOil

Basement

Storage Space

Parking

DrivewayPrivate

Construction

Frame

Utilities

Electricity Available

Sewer

Cesspool

Water Source

Other

Schools

Elementary:
Minnesauke Elementary School
Middle:
Paul J Gelinas Junior High School
High:
Ward Melville Senior High School

Financial Details

Parcel Number

0200-198-00-01-00-006-000

Affordability Calculator

$1,090

Estimated monthly payment

$29/mo

Principal $4,360 · Est. interest $6,083 over 30 yrs

Neighborhood Market Statistics

How this home compares to active listings in Stony Brook, NY

$772,222
Median Listing Price
25
Median Days on Market
2,000
Median Sq Ft
$375
Median Price / Sq Ft
67
Active Listings
  • This home’s price is 99% below the area median.
  • Its price per sq ft is 99% below the area median.

Market statistics compiled from active EXIT Realty® and MLS listings in Stony Brook, NY.

Location

Map showing the location of 21 Walnut Avenue, Stony Brook, NY 11790

Points of Interest in Stony Brook, NY

Showing the Stony Brook area map.

Nearby Schools

  • Three Village Central School District

    School · 0.2 mi away

  • The Stony Brook School

    Secondary · 0.4 mi away

  • North Shore Montessori School

    Elementary · 0.4 mi away

  • Paul J. Gelinas Junior High School

    Secondary · 1.4 mi away

  • Minnesauke Elementary School

    Elementary · 1.6 mi away

  • Nassakeag Elementary School

    Elementary · 1.7 mi away

  • Messiah Preschool and Day Care

    School · 1.8 mi away

  • William Sidney Mount School

    Elementary · 1.9 mi away

  • Setauket Elementary School

    Elementary · 2.0 mi away

  • Montessori School at Old Field, Inc.

    Elementary · 2.2 mi away

  • Imagination Pre-School

    School · 2.2 mi away

  • Robert Cushman Murphy Junior High School

    Secondary · 2.3 mi away

  • Laurel Hill School

    Elementary · 2.3 mi away

  • Harbor Country Day School

    Secondary · 2.3 mi away

  • Faith Preschool

    School · 2.4 mi away

  • Play Groups School

    School · 2.6 mi away

  • The Knox School

    School · 2.7 mi away

  • St James Methodist Nursery School

    School · 2.7 mi away

  • St James Elementary School

    Elementary · 2.8 mi away

  • Smithtown Co-OP Nursery School

    School · 3.0 mi away

Commute Calculator

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Nearby Homes

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Similar Home Values

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Moving Cost Estimate

EXIT Agents in Stony Brook

Listing Courtesy: EMLAK Realty LLC - 5164262910

Presented by: Haluk J. Yavas

The data relating to real estate for sale on this website comes in part from the Internet Data exchange of OneKey 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. Information deemed reliable but not guaranteed. Copyright ©2026 OneKey MLS. All Rights Reserved
Fair Housing Notice

The data relating to real estate for sale on this web site comes in part from the Internet Data Exchange (IDX) program of one or more Multiple Listing Services (MLS). Listing information is deemed reliable but is not guaranteed accurate. Copyright © EXIT Realty® and respective MLS providers.

Data provided by LIBOR. MLS® Listing#1025436. © 2026EXIT Realty®. All rights reserved.