49 Union Ave, Islip, NY 11751
OFF MARKET

49 Union Ave
Islip, NY 11751

  • 4 Beds
  • 2.5 Baths
  • 2,300 sqft (on 0.27 acres)

$1,008,100

Trulia Estimate
as of Aug 19, 2026
Est. Refi. Payment $6,727/mo*
Refinance Your Home

$1,008,100

Trulia Estimate
as of Aug 19, 2026
Est. Refi. Payment $6,727/mo*
Refinance Your Home
4 Beds
2.5 Baths
2,300 sqft
(on 0.27 acres)

Home Value

Trulia Estimate
$1.01M
Since last month
Decreased$7K (-0.7%)
Since last year
Increased$101K (+11.1%)
Since last sale
Increased$363K (+56.5%)
Learn more about this home's value by checking out its Trulia Estimate, the value of nearby homes, and how much similar homes have sold for.

Trulia Estimate

The of this home's value increased by +73% in the last 10 years
MonthEstimated value
2026
August 2026$1.01M
July 2026$1.01M
June 2026$1.03M
May 2026$1.01M
April 2026$987K
March 2026$987K
February 2026$967K
January 2026$962K
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
91 Union Avenue, Islip, NY
0.09
Single-Family Home
$750,000
10/22/25
4
2
2,481
71 Willow Avenue, Islip, NY
0.09
Single-Family Home
$800,000
02/02/26
3
1.5
2,172
77 Church Avenue, Islip, NY
0.21
Single-Family Home
$735,000
10/10/25
4
2.5
2,500
46 Monell Avenue, Islip, NY
0.10
Single-Family Home
$821,000
06/29/26
5
2
2,700
53 Church Avenue, Islip, NY
0.19
Single-Family Home
$698,000
10/01/25
4
2
1,937
47 Smith Avenue, Islip, NY
0.13
Single-Family Home
$800,000
05/21/26
4
2
2,128
117 Union Avenue, Islip, NY
0.16
Single-Family Home
$867,000
03/02/26
3
2.5
2,415
27 Hollister Lane, Islip, NY
0.22
Single-Family Home
$995,000
04/02/26
5
2.5
2,637
184 Beech St, Islip, NY
0.09
Single-Family Home
$800,000
11/06/25
6
3
3,000
57 Wave Crest Drive, Islip, NY
0.31
Single-Family Home
$765,000
03/27/26
4
1.5
1,358

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
50 Union Avenue, Islip, NY 11751
0.09
$884,000
4
3
-
Off Market
46 Monell Avenue, Islip, NY 11751
0.10
$821,000
5
2
2,700
Recently Sold
65 Willow Avenue, Islip, NY 11751
0.08
$939,700
3
2
-
Off Market
71 Willow Avenue, Islip, NY 11751
0.09
$800,000
3
1.5
2,172
Recently Sold
91 Union Avenue, Islip, NY 11751
0.09
$750,000
4
2
2,481
Recently Sold
47 Smith Avenue, Islip, NY 11751
0.13
$800,000
4
2
2,128
Recently Sold
24 Bay 3rd, Islip, NY 11751
0.15
$595,000
3
1
1,176
Recently Sold
49 S Bay Avenue, Islip, NY 11751
0.15
$1,197,200
8
3.5
4,688
Off Market
98 Cortelyou Street, Islip, NY 11751
0.17
$793,700
5
2
2,000
Off Market
199 Raymond Street, Islip, NY 11751
0.15
$817,000
3
2
2,372
Off Market
117 Union Avenue, Islip, NY 11751
0.16
$867,000
3
2.5
2,415
Recently Sold
110 S Bay Avenue, Islip, NY 11751
0.16
$942,600
4
3
2,734
Off Market

Local Information

  • Map ViewExplore the area around 49 Union Ave.
  • Schools2 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
2000
Lot Size
0.27 acres
Living Area
2,300 sqft
Price/Sqft
$438
Parking
Garage

About this House

Homes in this South of Montauk area go fast and this one has everything! Walk to shops and restaurants, bike to beach and nature center. Large home built in 2003 with full granite kitchen, CAC ,brand new boiler and water heater, Crown moldings and wainscott, Full finished basement with full Ba. Master suite, Wood fireplace, Composite deck overlooking heated pool, hot tub and large backyard, 2 large sheds with electric, full attic with tons of storage and much more! First showing 7/1
49 Union Ave, Islip, NY 11751 is a 4 bedroom, 2 bathroom, 2,300 sqft single-family home built in 2000. It last sold for $642,500 on Nov 10, 2019. It is currently off market. The Trulia Estimate is $1,008,100, with a rent estimate of $4,455/month.

Home Details for 49 Union Ave

Interior Features

Interior Details
BasementTypes of Rooms: Dining Room, Family Room
Heating & Cooling
Heating: Baseboard, GasAir ConditioningCooling System: CentralHeating Fuel: Baseboard
Levels, Entrance, & Accessibility
Stories: 2Floors: Carpet, Laminate, Linoleum Vinyl
Appliances & Utilities
DryerRefrigeratorWasher

Property Information

Year Built
Year Built: 2000
Property Type / Style
Property Type: Single Family HomeArchitecture: Queen Anne / Victorian

Exterior Features

Exterior Home Features
Exterior: Vinyl
Parking & Garage
GarageParking Space: 1Parking: Garage Attached

Lot Information

Lot Area: 0.27 acres

Price and Tax history

DateEventPrice
Jun 30, 2020
Source: Agent Provided
ListingRemoved
$689,990
Apr 5, 2020
Source: Agent Provided
Pending
$689,990
Jan 7, 2020
Source: Agent Provided
PendingToActive
$689,990
Jan 7, 2020
Source: Agent Provided
Pending
$689,990
Dec 23, 2019
Source: Agent Provided
PendingToActive
$689,990

Market trends in Islip

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
36
6MoM

Around this home

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

LGBTQ Local Legal Protections

Frequently asked questions about 49 Union Ave

  • What is 49 Union Ave estimated to be worth?
    Trulia's estimated value for 49 Union Ave in Islip, NY is $1,008,100.
  • What is the price history for 49 Union Ave?
    49 Union Ave in Islip, NY last sold for $642,500 in November 2019.
  • Is Islip a buyer's or seller's market?
    Islip is currently a seller's market, based on recent for-sale activity.
  • What do residents say about Islip?
    Residents describe Islip, NY as easy to park in, dog-friendly, and well-kept. Most residents say you need a car. See recently sold homes in Islip, NY.
  • Does 49 Union Ave have air conditioning?
    Yes, 49 Union Ave in Islip, NY has air conditioning.
  • Does 49 Union Ave have laundry facilities?
    Yes, 49 Union Ave in Islip, NY has in-unit laundry.

Explore by feature - Air Conditioning

7 rentals with air conditioning in Islip, NY

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Off Market Homes Near 49 Union Ave

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