3 Bedroom Apartments for Rent in Islandia, NY (22 Rentals)

How Many Bedrooms?Done
Select your price rangeDone
Lifestyle Matching SearchDone
Learn more about Lifestyle Search
By AmenitiesDone
By Community TypeDone
Features and AvailabilityDone
Done

Roommate Matching: Finding the Right Fit and Avoiding Pitfalls

When searching for a roommate, follow this list of essential steps and set clear expectations to create a solid foundation for a harmonious living situation.

Read Article

The Art of the Rental Viewing: What to look for during a property tour

Touring a rental? This guide helps you know exactly what to look for, from safety features to hidden flaws, so you can confidently sign your lease or keep searching.

Read Article
property at 559 Rosevale Ave

559 Rosevale Ave

RonkonkomaNY11779
property at 257 Southlawn Ave

257 Southlawn Ave

Central IslipNY11722

Smart Renter's Guide: Calculating Affordable Rent & Housing Costs

Wondering how to determine your rental budget? This comprehensive guide covers everything from the 30% rule to hidden fees and effective budgeting strategies.

Read Article
close
View Me
1-9 Gilbert Ave
3 Bedroom Apartments

1-9 Gilbert Ave

1-9 Gilbert AveSmithtown, NY 11787
Showing Results 1-22, Page 1 of 1

Islandia, NY Local Guide

Largest Available Islandia and Nearby 3 Bedroom Apartments

The largest available 3 Bedroom apartment unit in Islandia, NY is found at Carlow in the Courthouse Commons neighborhood and is 1,755 square feet priced from $6,395. Fairfield At Ronkonkoma in the Five Corners neighborhood has the second largest 3 Bedroom, which is sized at 1,618 square feet and currently listed start at $3,885. Here is today’s list of the largest available 3 Bedroom units in Islandia:

Apartment ListingModel NameSquare FootagePriced From
CarlowC21,755 Sq Ft$6,395
Fairfield At RonkonkomaThe Astor Place*1,618 Sq Ft$3,885
Avalon CommonsC1R1,327 Sq Ft$4,146

Cheapest Available Islandia and Nearby 3 Bedroom Apartments

As of June 10, 2025 the lowest priced 3 Bedroom apartment unit in Islandia, NY is the The Carnegie Model starting from $3,780 at Fairfield At Ronkonkoma in the Five Corners neighborhood. The second most affordable Islandia 3 Bedroom is the C1R Model at Avalon Commons starting at $4,146 in the North Smithtown neighborhood. The average price for all 3 Bedroom apartments in Islandia is currently $5,192. Here is today’s list of the cheapest available 3 Bedroom options in Islandia:

Apartment ListingModel NamePriced From
Fairfield At RonkonkomaThe Carnegie$3,780
Avalon CommonsC1R$4,146
CarlowC1$6,384

Quick Rent Budget Calculator

How much rent can you afford?

The common "Rule of Thumb" is that rent should be no more than 30% of your income. How much is that? Enter your monthly income and click "Calculate My Budget" to find out.

decorative image of people with a giant lease agreement

Remember the 3 Rules of Real Estate:
Location, Location, Location!

Explore Islandia, NY Rentals by Map

Decorative image of map

See the most popular apartments and homes in Islandia, NY

View MapIslandia, NY Apartments MapView MapIslandia, NY Rental Homes Map

Getting Around Islandia, NY

Walk Score®

42 / 100

Car-Dependent

Most errands require a car

Bike Score®

44 / 100

Somewhat Bikeable

Minimal bike infrastructure

What Are Walk Score®, Transit Score®, and Bike Score® Ratings?

  • Walk Score® measures the walkability of any address.
  • Transit Score® measures access to public transit.
  • Bike Score® measures the bikeability of any address.

Frequently Asked Questions about 3 Bedroom Islandia Apartments

What is the Cheapest apartment in Islandia with 3 Bedroom?

Currently the most affordable 3 Bedroom in Islandia is at Fairfield At Ronkonkoma listed at $3,780.

How much is the average rent for a 3 Bedroom Islandia Apartment?

The average rent for a 3 Bedroom Apartment in Islandia is $5,192.

What is the largest available 3 Bedroom Islandia Apartment for rent?

Today's apartment with the most square footage in Islandia is a 1,755 square feet unit starting from $6,395 at Carlow.

What is the average size for Islandia 3 Bedroom Apartments for rent?

The average size for a 3 Bedroom rental in Islandia is currently 1,683 sq ft.

Expert Rental Resources

Helpful Apartment Articles, How-To's and Tips

The rental experts at ApartmentHomeLiving.com provide you with top advice, tools, and tips for understanding the leasing process and finding the perfect rental. Here are a few helpful rental and leasing articles from our experts to guide you on your search.

decorative image for The Art of the Rental Viewing: What to look for during a property tour article

The Art of the Rental Viewing: What to look for during a property tour

Written by: Marie Brown

You’ve scrolled through countless listings, walked through a blur of rentals, and finally found what feels like the one. The pictures? Fantastic. The neighborhood seems just right.

decorative image for Know Your Budget: Calculating What You Can Realistically Afford When Renting article

Know Your Budget: Calculating What You Can Realistically Afford When Renting

Written by: Lauren Harrington

Renting an apartment or house isn’t just about looking through online ads, choosing a few apartments or homes you want to tour, filling out an application, and putting down a deposit. Those things are all necessary and important.

decorative image for The Freedom of Short-Term Leases: Exploring the Advantages for Renters article

The Freedom of Short-Term Leases: Exploring the Advantages for Renters

Written by: Bobbi Jackson

If you’re looking to relocate right now, a popular solution that may best fit your current rental needs is a short-term lease.

decorative image for Navigating the Rental Market: Tips for First-Time Renters article

Navigating the Rental Market: Tips for First-Time Renters

Written by: Sandy Baker

Making the decision to rent is exciting and terrifying at the same time. For many people, there are a lot of unknowns.