31 Union Ave, Islip, NY 11751
Property image
Property image
OFF MARKET

31 Union Ave
Islip, NY 11751

  • 3 Beds
  • 2 Baths
  • 1,800 sqft (on 0.50 acres)

$959,400

Trulia Estimate
as of Aug 1, 2026
Est. Refi. Payment $6,345/mo*
Refinance Your Home

$959,400

Trulia Estimate
as of Aug 1, 2026
Est. Refi. Payment $6,345/mo*
Refinance Your Home
3 Beds
2 Baths
1,800 sqft
(on 0.50 acres)

Local Information

  • Map ViewExplore the area around 31 Union Ave.
  • Schools2 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Multi-Family
Year Built
1890
Lot Size
0.5 acres
Living Area
1,800 sqft
Price/Sqft
$533
Parking
Garage

About this House

Beautifully Updated 3 Bedroom 2 Full Bath, Colonial. Master Suite On First Floor, Wood Floors, Washer /Dryer. Large Fenced Yard And Shed. Central Air , Great Location 1 Block South Of Main St In Islip. Pets Allowed. Must See.. Won't Last ... (Listing 3035873 Confirmed 1/17/2019.)
31 Union Ave, Islip, NY 11751 is a 3 bedroom, 2 bathroom, 1,800 sqft multi-family built in 1890. It last sold for $1,500,000 on Dec 19, 2024. More recently, it was listed as a rental in December 2018 with an asking price of $2,800 per month. That rental listing was removed on January 19, 2019. It is currently off market. The Trulia Estimate is $959,400, with a rent estimate of $3,452/month.

Home Details for 31 Union Ave

Interior Features

Heating & Cooling
Heating: OtherAir ConditioningCooling System: CentralHeating Fuel: Other
Levels, Entrance, & Accessibility
Stories: 2Floors: Hardwood
Interior Details
Types of Rooms: Dining Room
Appliances & Utilities
DishwasherDryerWasher

Property Information

Year Built
Year Built: 1890
Property Type / Style
Property Type: Multi FamilyArchitecture: Colonial

Exterior Features

Parking & Garage
GarageParking: Garage Detached

Lot Information

Lot Area: 0.50 acres

Price History for 31 Union Ave

DatePriceEventSource
12/19/2024$1,500,000Sold
N/A
01/19/2019$3,000ListingRemovedAgent Provided
12/29/2018$3,000PriceChange
Agent Provided
12/28/2018$390,000Sold
OneKey® MLS as distributed by MLS GRID #L2977297
12/04/2018$2,800Listed For RentAgent Provided
10/02/2018$499,999PriceChange
Agent Provided
08/08/2018$469,000PriceChange
Agent Provided
03/03/2018$549,900PriceChange
Agent Provided
02/26/2018$650,000Listed For SaleAgent Provided

Market trends in Islip

Last updated June 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
42
4MoM
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Property Tax and Assessment

Year2025
Tax
Assessment$34,500
Home facts updated by county records

Comparable Sales for 31 Union Ave

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
25 1st Street, Islip, NY
0.26
Multi-Family Home
$580,000
12/16/25
2
2
1,542
113 Islip Ave, Islip, NY
0.51
Multi-Family Home
$640,000
01/08/26
4
2
2,000
23 Robbins Avenue, Islip, NY
0.68
Multi-Family Home
$530,000
07/16/26
3
2
1,714
39 Chapman Place, Bay Shore, NY
1.39
Multi-Family Home
$683,500
03/30/26
5
2
2,799
73-75 Washington Street, East Islip, NY
1.74
Multi-Family Home
$750,000
06/04/26
4
4
2,309
57 Fischer Avenue, Islip Terrace, NY
1.96
Multi-Family Home
$840,000
02/18/26
7
3
2,456
1409 Saxon Ave, Bay Shore, NY
1.90
Multi-Family Home
$700,000
08/28/25
6
3
3,000
184 Overlook Drive, East Islip, NY
2.51
Multi-Family Home
$850,000
02/10/26
4
2
1,944
28 Oneill Avenue, Bay Shore, NY
1.61
Multi-Family Home
$550,000
03/16/26
-
2,853
44 Chapman Place, Bay Shore, NY
1.43
Multi-Family Home
$500,000
01/09/26
-
1,755

Nearby homes

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Assigned Schools

These are the assigned schools for 31 Union Ave.
View nearby schools on GreatSchools
The GreatSchools Rating compares schools on a variety of school quality indicators including test scores, college readiness, equity and more. Learn more.

What Locals Say about Islip

At least 118 Trulia users voted on each feature.

  • 90 % Say parking is easy

  • 90 % Say it's dog friendly

  • 88 % Say car is needed

  • 86 % Say there's holiday spirit

  • 85 % Say yards are well-kept

  • 75 % Say people would walk alone at night

  • 73 % Say kids play outside

  • 65 % Say neighbors are friendly

  • 64 % Say it's quiet

  • 63 % Say it's walkable to restaurants

  • 62 % Say streets are well-lit

  • 62 % Say they plan to stay for at least 5 years

  • 59 % Say there are sidewalks

  • 59 % Say it's walkable to grocery stores

  • 59 % Say there's wildlife

  • 49 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • Michellereid2323
    "Family-oriented neighborhood. Main Street is charming, walkable, and dotted with boutiques, cafes, and diners."
    0
    Flag
  • Matt Classie
    "Street fairs, events at Brookwood Hall during holidays. Theres lots to do in the town of Islip. Bats & Brews is a great event."
    0
    Flag
  • Yen160107
    "I have kids that play in the front yard and they step on the dog feces that they left behind. Also I have signs that say “kids at play” but they do not care"
    0
    Flag
  • Trulia User
    "The drive is horrible and the traffic which is 300 feet from your front door is deafening! A ten lane super hwy and that’s what you wake up to at 4:30 am every day ! Or you can take the train a mile away which you can also here every morning blasting it’s way to islip train station . "
    0
    Flag
  • Trulia User
    "Well celebrate almost all the events soccer games good school very friendly neighborhoods good shopping center "
    1
    Flag
  • Jamal G.
    "this neighborhood is a great place to live there are restaurants in the mall nearby good schools and they are also close"
    14
    Flag
  • Stephen B.
    "The taxes are very high here for the school. Bay Shore schools are just as good or better and the taxes are much lower. "
    9
    Flag
  • Michael .
    "Good! I work in the city and take the LIRR. The islip station has free parking and plenty of spaces."
    1
    Flag
  • Monmona
    "you need to have a car to commute around. around. if you live close enough to the Long Island Railroad, then you can walk to the station and take the train from there."
    1
    Flag
  • Fldsetter
    "I grew up here and actually bought my childhood home back after living in another part of the country . Beaches are close , most folks keep there homes well maintained . There are lot of children here and the schools are second to none . I wish the town would replace the roads here , and take better care of there pubic areas ! But let the young folks moving in fight that fight ! "
    1
    Flag
  • Djhafner132
    "5 min to train station.the neighbors are friendly.i am an avid fisherman and two fishing piers are less than a mile away.the streets are well treed and maintained "
    0
    Flag
  • Djhafner132
    "I lived here since 1973.The homes are well kept and neighbors are friendly.the town dock is an easy walk with great fishing the streets are well maintained.All in all a great place to live"
    0
    Flag
  • Djhafner132
    "Parades block parties great fishing close by.great south of montauk location.Great place to raise a family "
    0
    Flag
  • Ricktssf
    "I work locally, so I can walk to work. the train station to NYC is only 4 blocks away. easy commute on the train. "
    2
    Flag
  • G.Greco
    "I've made Islip my home since 1980. Yards are well kept, the streets are maintained, paved and cleaned regularly. The school district is good. It's a good place to live and raise a family. This area south of Montauk is very desirable"
    16
    Flag
  • Tannuramees
    "parades, fairs, shops close by, farmers market, good schools, nice neighborhood, school events, town events"
    1
    Flag
  • Catherine M.
    "I have lived here for 18 years and for the most part it’s a good area. I am not a huge fan of the school district but it’s not horrible either ."
    11
    Flag
  • Stefbartoli
    "Dog friendly neighborhood! People walk their dogs around regularly. Neighbors look out for each other’s pets as well. "
    1
    Flag
  • Tyase930
    "Quiet respectful neighbors. Walking distance to stores. Lots of new businesses and new development s."
    0
    Flag
  • Tony H.
    "I live in this neighborhood for 2 years so far people are very friendly, there's always parking, people walk their dogs at night and exercise regularly. It's pretty cool !!!"
    0
    Flag
  • Fldsetter
    "Crappy roads / rats / compact floresant lights instead of LED ( someone got paid off ) no trees left due to disease , and the town is not planting any ! Highway noise 10 lanes now on Sunrise HWY - RT27 . No plans for a sound wall ??? I guess we are lower class here in Islip . Airplane and helicopters all day and night fly over head ,, isn’t there a bay or ocean they can fly over then go straight up Lakeland Blvd to the airport ???? I will eave as soon as I find a house elsewhere and not in NY "
    0
    Flag
  • Ricktssf
    "I'm 17 years living in Islip. a little great Hamlet along the great South Bay. Town of Islip is much larger, but this is a Suburban area. "
    0
    Flag

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Explore by feature - Air Conditioning

6 rentals with air conditioning in Islip, NY

Homes for sale near 31 Union Ave

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Off Market Homes Near 31 Union Ave

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