Islip NY FSBO Homes (108)

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We have homes for sale by owner in Islip, NY. The median list price in Islip, NY is $2,060,933 and the average price per square foot is $224.

Homes For Sale

$329,000

2 Bed
1 Bath
1,000 Sqft

2439 Union Boulevard #1A, Islip, NY

Welcome to 2439 union blvd unit 1a! this beautiful 2 bedroom was updated in 2018 with hardwood flooring and in... Read More

Homes For Sale

$620,000

5 Bed
3 Bath
2,243 Sqft
0.11 Acre(Lot)

61 Peckham Avenue, Islip, NY

Custom built large well maintained 5 bedroom 3 bath high ranch in islip schools with possible mother/daughter... Read More

Homes For Sale

$239,000

1 Bed
1 Bath
588 Sqft

2449 Union Boulevard #24A, Islip, NY

Move right into this charming and meticulously maintained one-bedroom co-op located on the first floor for easy... Read More

Homes For Sale

$285,000

1 Bed
1 Bath
900 Sqft

2453 Union Boulevard Blvd #11A, Islip, NY

Welcome home! move right in to this meticulously maintained & beautifully updated 1 bedroom/ 1 bathroom deluxe... Read More

Homes For Sale

$239,900

1 Bed
1 Bath
952 Sqft

2453A Union Boulevard #21A, Islip, NY

Welcome home to this first floor 2-bedroom co-op in the sought-after forest green community! this unit offers 2... Read More

Homes For Sale

$289,999

1 Bed
1 Bath
847 Sqft

2453 Union Boulevard #37A, Islip, NY

This forest green community updated expansive first floor 1 bedroom co-op features a bonus room/office! hardwood... Read More

Homes For Sale

$799,000

4 Bed
3 Bath
2,434 Sqft
0.17 Acre(Lot)

10 Garretson Avenue, Islip, NY

Prepare to be impressed! located on a beautiful cul-de-dac and loaded with amenities galore this fully updated... Read More

Homes For Sale

$799,000

5 Bed
2 Bath
3,832 Sqft
0.28 Acre(Lot)

11 Woodside Avenue, Islip, NY

Stunning expanded ranch located south of montauk highway! welcome to this beautifully expanded 5 bedroom 2 full... Read More

Homes For Sale

$219,999

1 Bed
1 Bath
700 Sqft

2413 Union Boulevard #5B, Islip, NY

This beautifully updated 1-bedroom, 1-bath upper-level forest green co-op offers a low-cost lifestyle with an... Read More

Homes For Sale

$489,000

3 Bed
2 Bath
1,089 Sqft
0.11 Acre(Lot)

40 Roosevelt Avenue, Islip, NY

Well maintained cape code home situated in quiet neighborhood. house features 3 bedrooms, 2 full baths, full... Read More

Homes For Sale

$799,999

4 Bed
3 Bath
2,114 Sqft
0.46 Acre(Lot)

80 Monell Avenue, Islip, NY

Discover the perfect blend of space, functionality, and versatility in this maintained 2-family duplex-style... Read More

Condo For Sale

$259,900

2 Bed
1 Bath
8,952 Sqft

2453A Union Boulevard #21A, Islip, NY

Welcome home to this first floor 2-bedroom co-op in the sought-after forest green community! this unit offers 2... Read More

Homes For Sale

$499,900

4 Bed
1 Bath
1,131 Sqft
0.14 Acre(Lot)

27 Spruce Street, Islip, NY

This charming first-time homebuyer’s gem offers incredible potential and a solid foundation to create your dream... Read More

Pending

Homes For Sale

$639,900

4 Bed
2 Bath
1,937 Sqft
0.19 Acre(Lot)

53 Church Avenue, Islip, NY

Welcome to 53 church ave ! this charming 4 bedroom & 2 bathroom colonial located in the heart of islip is close... Read More

Homes For Sale

$237,500

1 Bed
1 Bath
850 Sqft

2449I Union Avenue #34A, Islip, NY

Large 850 sq ft 1br deluxe ground level unit, oak floors through out, bonus room office/nursery, large br ample... Read More

Homes For Sale

$674,999

4 Bed
3 Bath
1,841 Sqft
0.34 Acre(Lot)

3 Russet Lane, Lake Grove, NY

Amazing oppurtunity !! renovated home in village of lake grove !! mother daughter oppertunity or accesery rental... Read More

Homes For Sale

$739,000

4 Bed
2 Bath
2,000 Sqft
0.25 Acre(Lot)

33 41st Street, Islip, NY

This updated hi ranch has a 10 year old roof, andersen double hung windows. two level floorplan offers flexible... Read More

Homes For Sale

$849,000

4 Bed
3 Bath
2,500 Sqft
0.21 Acre(Lot)

77 Church Avenue, Islip, NY

Magnificent old world charm colonial in south islip. walking distance to lovely main street with shops,... Read More

Homes For Sale

$459,000

3 Bed
1 Bath
1,236 Sqft
0.11 Acre(Lot)

96 Pardee Avenue, Islip, NY

Welcome to this charming expanded ranch nestled in islip! this lovely 3-bedroom home offers a comfortable layout... Read More

Homes For Sale

$220,000

1 Bed
1 Bath
825 Sqft

2417 Union Boulevard #2B, Islip, NY

Large one bedroom unit on second floor with newer kitchen and hardwood floors throughout. north facing unit to... Read More

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Islip - Statistics and Home Trends

Actives Activity Chart

Homes For Sale By Owner in Islip 736

	Average Price
1 Bed Homes For Sale in Islip (2)	$ 90,000
2 Bed Homes For Sale in Islip (58)	$ 388,906
3 Bed Homes For Sale in Islip (258)	$ 631,007
4 Bed Homes For Sale in Islip (251)	$ 858,839
5+ Bed Homes For Sale in Islip (148)	$ 1,486,547

AVERAGE PRICE

$ 691,060

NEW LISTINGS THIS WEEK

721

PRICE PER SQUARE FOOT

$ 461

Condos For Sale By Owner in Islip 92

	Average Price
1 Bed Condos For Sale in Islip (6)	$ 292,000
2 Bed Condos For Sale in Islip (61)	$ 567,665
3 Bed Condos For Sale in Islip (17)	$ 628,999
4 Bed Condos For Sale in Islip (8)	$ 879,625

AVERAGE PRICE

$ 647,065

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

$ 436

Townhomes For Sale By Owner in Islip 3

	Average Price
2 Bed Townhomes For Sale in Islip (1)	$ 499,999
3 Bed Townhomes For Sale in Islip (2)	$ 514,450

AVERAGE PRICE

$ 621,640

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

$ 445

Land For Sale By Owner in Islip 18

	Average Price
Land For Sale in Islip (18)	$ 650,002

AVERAGE PRICE

$ 650,002

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

$ N/A

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Learn More About Islip, New York

Currently there are 736 homes for sale, 92 condos and apartments for sale, 18 vacant land for sale and 3 townhomes for sale in Islip

Currently Islip has 849 properties on the market for sale. The inventory was last updated 06/09/2025. Of these properties, 736 single family homes are for sale by their owners in Islip, and 92 condos are for sale by their owners in Islip. The average price of the single family homes for sale in Islip, is $691,060, the average condo price in Islip, is $647,065. The average price per square foot of the active inventory is $336. This is based the living area square footage.

Over the last year, there have been 0 of properties sold in Islip. Of these properties, 0 single family homes have sold by their owners in Islip, and 0 condos have sold by their owners in Islip. The average sales price of the single family homes sold in Islip, is $. Single family homes have been selling for per square foot of living area. The average sales price of the condos for sale in Islip, is $. Condos have been selling for per square foot of living area.

The most active subdivisions with listings for sale in Islip, are:

If you are thinking of selling your Islip home, try our flat fee listing service, Our list fees start at $449, and may save you $15,000 in real estate commissions. Click here to start saving.

Disclaimer: Listing broker has attempted to offer accurate data, but buyers/lessees are advised to confirm all information IDX information is provided exclusively for consumers' personal, non-commercial use that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, and that data is deemed reliable but is not guaranteed accurate by the MLS. The MLS may, at its discretion, require use of other disclaimers as necessary to protect Participants and/or the MLS from liability.
This data up-to-date as of 06/09/2025

Islip NY FSBO Homes (108)

2439 Union Boulevard #1A, Islip, NY

61 Peckham Avenue, Islip, NY

2449 Union Boulevard #24A, Islip, NY

2453 Union Boulevard Blvd #11A, Islip, NY

2453A Union Boulevard #21A, Islip, NY

2453 Union Boulevard #37A, Islip, NY

10 Garretson Avenue, Islip, NY

11 Woodside Avenue, Islip, NY

2413 Union Boulevard #5B, Islip, NY

40 Roosevelt Avenue, Islip, NY

80 Monell Avenue, Islip, NY

2453A Union Boulevard #21A, Islip, NY

27 Spruce Street, Islip, NY

53 Church Avenue, Islip, NY

2449I Union Avenue #34A, Islip, NY

3 Russet Lane, Lake Grove, NY

33 41st Street, Islip, NY

77 Church Avenue, Islip, NY

96 Pardee Avenue, Islip, NY

2417 Union Boulevard #2B, Islip, NY

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Islip - Statistics and Home Trends

Actives Activity Chart

AVERAGE PRICE

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

AVERAGE PRICE

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

AVERAGE PRICE

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

AVERAGE PRICE

NEW LISTINGS THIS WEEK

PRICE PER SQUARE FOOT

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Learn More About Islip, New York

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