18 40th St, Islip, NY 11751
OFF MARKET

18 40th St
Islip, NY 11751

  • 4 Beds
  • 3.5 Baths
  • 2,600 sqft (on 0.35 acres)

$821,500

Trulia Estimate
as of Aug 12, 2026
Est. Refi. Payment $5,430/mo*
Refinance Your Home

$821,500

Trulia Estimate
as of Aug 12, 2026
Est. Refi. Payment $5,430/mo*
Refinance Your Home
4 Beds
3.5 Baths
2,600 sqft
(on 0.35 acres)

Home Value

Trulia Estimate
$822K
Since last month
Increased$15K (+1.8%)
Since last year
Increased$26K (+3.1%)
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 +137% in the last 10 years
MonthEstimated value
2026
August 2026$851K
July 2026$823K
June 2026$836K
May 2026$852K
April 2026$814K
March 2026$827K
February 2026$803K
January 2026$808K
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
49 41st St, Islip, NY
0.09
Single-Family Home
$192,000
10/07/25
4
2.5
2,800
58 39th Street, Islip, NY
0.07
Single-Family Home
$820,000
04/02/26
5
2.5
2,200
33 41st Street, Islip, NY
0.03
Single-Family Home
$757,000
08/12/25
4
2
2,000
6 Oxford Street, Islip, NY
0.14
Single-Family Home
$720,000
04/30/26
4
2
2,208
65 39th Street, Islip, NY
0.09
Single-Family Home
$665,000
06/18/26
3
2.5
1,208
1 Winthrop Street, Islip, NY
0.17
Single-Family Home
$730,000
07/28/26
5
2
2,400
23 Windsor Street, Islip, NY
0.27
Single-Family Home
$685,000
03/19/26
4
3
2,000
35 40th Street, Islip, NY
0.11
Single-Family Home
$690,000
12/04/25
3
2
1,834
1340 Spur Drive S, Islip, NY
0.23
Single-Family Home
$800,000
12/29/25
5
3
3,404
1344 Boston Avenue, Bay Shore, NY
0.33
Single-Family Home
$625,000
02/18/26
6
3
2,448

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
14 40th Street, Islip, NY 11751
0.02
$741,400
3
2
-
Off Market
58 39th Street, Islip, NY 11751
0.07
$820,000
5
2.5
2,200
Recently Sold
65 39th Street, Islip, NY 11751
0.09
$665,000
3
2.5
1,208
Recently Sold
33 41st Street, Islip, NY 11751
0.03
$794,100
4
2
2,000
Off Market
24 40th Street, Islip, NY 11751
0.06
$799,100
5
2
2,572
Off Market
46 39th Street, Islip, NY 11751
0.11
$699,999
3
3
2,340
For Sale
2 Weldon Street, Islip, NY 11751
0.09
$652,600
5
2
-
Off Market
443 Commack Road, Islip, NY 11751
0.08
$692,300
3
2.5
-
Off Market
35 40th Street, Islip, NY 11751
0.11
$690,000
3
2
1,834
Recently Sold
6 Oxford Street, Islip, NY 11751
0.14
$720,000
4
2
2,208
Recently Sold
4 Winthrop Street, Islip, NY 11751
0.16
$825,500
6
2
-
Off Market
1 Winthrop Street, Islip, NY 11751
0.17
$730,000
5
2
2,400
Recently Sold

Local Information

  • Map ViewExplore the area around 18 40th St.
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Lot Size
0.35 acres
Living Area
2,600 sqft
Price/Sqft
$316
Parking
Garage

About this House

This single-family home is located at 18 40th St, Islip, NY. 18 40th St is in Islip, NY and in ZIP code 11751. This property has 4 bedrooms, 4 bathrooms and approximately 2,600 sqft of floor space. This property has a lot size of 0.35 acres.
18 40th St, Islip, NY 11751 is a 4 bedroom, 4 bathroom, 2,600 sqft single-family home. It is currently off market. The Trulia Estimate is $821,500, with a rent estimate of $4,924/month.

Home Details for 18 40th St

Interior Features

Interior Details
BasementAtticNumber of Rooms: 9Types of Rooms: Walk In Closet, Dining Room, Family Room, Laundry Room, Master Bath, OfficeWet Bar
Heating & Cooling
Heating: Forced Air, GasAir ConditioningCooling System: CentralHeating Fuel: Forced Air
Levels, Entrance, & Accessibility
Stories: 2Floors: Hardwood
Appliances & Utilities
Cable ReadyDishwasherDryerMicrowaveRefrigeratorWasher
Fireplace & Spa
FireplaceJetted Bath Tub
Windows, Doors, Floors & Walls
Double Paned Windows
Security
Security System

Exterior Features

Exterior Home Features
Roof: AsphaltExterior: VinylLawnPatioPorchSprinkler System
Pool
Pool
Parking & Garage
GarageParking Spaces: 4Parking: Garage Attached

Property Information

Property Type / Style
Property Type: Single Family HomeArchitecture: Colonial
Year Built
Year Updated: 2001

Community

Units in Building: 1

Lot Information

Lot Area: 0.35 acres

Price and Tax history

YearProperty taxTax assessment
2025Unavailable
$56,900
Home facts updated by county records

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
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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
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  • 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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Homes for sale near 18 40th St

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Off Market Homes Near 18 40th St

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Frequently asked questions about 18 40th St

  • What is 18 40th St estimated to be worth?
    Trulia's estimated value for 18 40th St in Islip, NY is $821,500.
  • 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.
  • What are the closest schools to 18 40th St?
    The closest schools to 18 40th St in Islip, NY are Commack Road Elementary School (rated 4/10), Islip High School (rated 7/10), Islip Middle School (rated 5/10).
  • Does 18 40th St have air conditioning?
    Yes, 18 40th St in Islip, NY has air conditioning.
  • Does 18 40th St have a pool?
    Yes, 18 40th St in Islip, NY has a pool.