91 Union Avenue, Islip, NY 11751
SOLD
OCT 22, 2025

91 Union Avenue
Islip, NY 11751

  • 4 Beds
  • 2 Baths
  • 2,481 sqft

$750,000

Last Sold: Oct 22, 2025
3% over list $730K
$302/sqft
Est. Refi. Payment $4,840/mo*
Refinance Your Home

$750,000

Last Sold: Oct 22, 2025
3% over list $730K
$302/sqft
Est. Refi. Payment $4,840/mo*
Refinance Your Home
4 Beds
2 Baths
2,481 sqft

Homes for sale near 91 Union Avenue

Skip to last item
Skip to first item

Apartments for Rent

Skip to last item
Skip to first item

Local Information

Map showing home location
© Google
-- mins to
Commute Destination

Description

This beautifully restored Colonial is located in a prime residential block, just south of Montauk and in close proximity to the vibrant Main St. area, offering a variety of restaurants, charming boutiques, and local beaches. This home features a bright and open floor plan, with an updated eat-in kitchen and stainless steel appliances. With 4 spacious bedrooms and 2 full baths, this property offers comfort and style. The meticulously maintained grounds include new brick pavers and a charming gazebo, perfect for outdoor relaxation and entertainment. A true gem in a highly desirable area!
This property is off market, which means it's not currently listed for sale or rent on Trulia. This may be different from what's available on other websites or public sources. This description is from August 13, 2025

Home Highlights

Parking
Garage
Outdoor
No Info
A/C
Heating & Cooling
HOA
None
Price/Sqft
$302/sqft
Listed
180+ days ago

Home Details for 91 Union Avenue

Interior Features

Interior Details
Number of Rooms: 7
Beds & Baths
Number of Bedrooms: 4Number of Bathrooms: 2Number of Bathrooms (full): 2
Dimensions and Layout
Living Area: 2481 Square Feet
Appliances & Utilities
Utilities: Electricity Connected, Sewer Connected, Trash Collection Public, Water ConnectedAppliances: Refrigerator, WasherRefrigeratorWasher
Heating & Cooling
Heating: Has Heating Unspecified TypeHas CoolingAir Conditioning: DuctlessHas HeatingHeating Fuel: Has Heating Unspecified Type
Gas & Electric
Has Electric on Property

Exterior Features

Parking & Garage
Number of Garage Spaces: 2Number of Covered Spaces: 2No CarportHas a GarageParking Spaces: 2Parking: Garage
Water & Sewer
Sewer: Public Sewer

Days on Market

Cumulative Days on Market: 18

Property Information

Year Built
Year Built: 1870
Property Type / Style
Property Type: ResidentialProperty Subtype: Single Family Residence, ResidentialArchitecture: Colonial
Building
Construction Materials: CedarNot Attached Property
Property Information
Parcel Number: 0500396000400073000

Price & Status

Price
List Price: $729,999Price Per Sqft: $302/sqft
Status Change & Dates
Off Market Date: Fri Apr 04 2025

Active Status

MLS Status: Sold

Location

Direction & Address
City: Islip
School Information
Elementary School: Maud S Sherwood Elementary SchoolJr High / Middle School: Islip Middle SchoolHigh School: Islip High SchoolHigh School District: Islip

Building

Building Area
Building Area: 2481 Square Feet

Community

Not Senior Community

HOA

No HOA

Lot Information

Lot Area: 9148 sqft

Listing Info

Special Conditions: None

Offer

Listing Agreement Type: Exclusive Right To Sell

Miscellaneous

Mls Number: 836404Attic: WalkupAttribution Contact: 631-650-9933Showing Requirements: Showing Service
Last check for updates: about 17 hours ago
Listed by Michael J. Watts
Michael J Watts & Assoc Inc, (631) 650-9933
Bought with: Michael Watts, (631) 786-2676, Michael J Watts & Assoc Inc, (631) 650-9933
Source: OneKey® MLS as distributed by MLS GRID, MLS#836404

Price History for 91 Union Avenue

DatePriceEventSource
10/22/2025$750,000Sold
N/A
08/13/2025$750,000Sold
OneKey® MLS as distributed by MLS GRID #836404
04/04/2025$729,999PendingOneKey® MLS as distributed by MLS GRID #836404
03/17/2025$729,999Listed For SaleOneKey® MLS as distributed by MLS GRID #836404
02/15/2016$427,500Sold
OneKey® MLS as distributed by MLS GRID #L2807116
08/04/2015$180,000Sold
N/A
02/18/2014$287,483ListingRemovedAgent Provided
03/20/2013$287,483Listed For SaleAgent Provided
Skip to last item
  • Results are loading
Skip to first item

Property Tax and Assessment

Year2024
Tax
Assessment$34,800
Home facts updated by county records

Comparable Sales for 91 Union Avenue

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
53 Church Avenue, Islip, NY
0.20
Single-Family Home
$698,000
10/01/25
4
2
1,937
77 Church Avenue, Islip, NY
0.19
Single-Family Home
$735,000
10/10/25
4
2.5
2,500
71 Willow Avenue, Islip, NY
0.08
Single-Family Home
$800,000
02/02/26
3
1.5
2,172
136 Monell Avenue, Islip, NY
0.15
Single-Family Home
$762,500
07/30/25
5
3
2,212
161 S Bay Avenue, Islip, NY
0.18
Single-Family Home
$860,000
07/01/25
3
2
1,950
117 Union Avenue, Islip, NY
0.06
Single-Family Home
$867,000
03/02/26
3
2.5
2,415
57 Wave Crest Drive, Islip, NY
0.27
Single-Family Home
$765,000
11/10/25
4
1.5
1,358
110 Saint Marks Lane, Islip, NY
0.32
Single-Family Home
$750,000
12/22/25
3
2
2,628
146 Smith Avenue, Islip, NY
0.21
Single-Family Home
$765,000
11/19/25
3
2.5
1,800

Assigned Schools

These are the assigned schools for 91 Union Avenue.
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

  • 64 % Say neighbors are friendly

  • 64 % Say it's quiet

  • 63 % Say it's walkable to restaurants

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

  • 62 % Say streets are well-lit

  • 60 % Say there are sidewalks

  • 59 % Say there's wildlife

  • 58 % Say it's walkable to grocery stores

  • 49 % Say there are community events

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

Based on information submitted to the MLS GRID as of 2026-02-06 15:18:24 PST. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information. Some IDX listings have been excluded from this website. Click here for more information

Homes for rent near 91 Union Avenue

Skip to last item
  • Results are loading
Skip to first item

Off Market Homes Near 91 Union Avenue

Skip to last item
Skip to first item
91 Union Avenue, Islip, NY 11751 is a 4 bedroom, 2 bathroom, 2,481 sqft single-family home built in 1870. This property is not currently available for sale. 91 Union Avenue was last sold on Oct 22, 2025 for $750,000 (3% higher than the asking price of $729,999). The current Trulia Estimate for 91 Union Avenue is $777,500.