15 William Ave, Islip, NY 11751
OFF MARKET

$731,500

Trulia Estimate
  • 5 Beds
  • 2 Baths
  • 1,996 sqft

15 William Ave, Islip, NY 11751

Est. Refi. Payment $4,956/mo*
Refinance Your Home
Currently Off Market - Sold Jun 25, 2019 for $480,000

Home Value

Trulia Estimate
$732K
Since last month
Increased$3K (+0.4%)
Since last year
Increased$37K (+5.3%)
Since last sale
Increased$252K (+52.4%)
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 +208% in the last 10 years
MonthEstimated value
2026
August 2026$732K
August 2026$731K
July 2026$728K
June 2026$740K
May 2026$725K
April 2026$708K
March 2026$713K
February 2026$698K
January 2026$702K
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
11 W Hemlock Street, Islip, NY
0.06
Single-Family Home
$415,000
07/22/26
3
2
912
62 Hemlock St, Islip, NY
0.30
Single-Family Home
$675,000
05/04/26
4
2
2,100
19 Rose Street, Islip, NY
0.31
Single-Family Home
$720,000
09/22/25
4
2
1,904
315 Grant Avenue, Islip, NY
0.24
Single-Family Home
$675,000
08/04/26
4
2
1,508
28 Bittermint Street, Islip, NY
0.33
Single-Family Home
$530,000
07/14/26
4
2
1,260
7 W Elm Street, Islip, NY
0.18
Single-Family Home
$700,000
08/07/26
4
2
1,461
130 Winganhauppauge Road, Islip, NY
0.20
Single-Family Home
$650,000
08/31/26
4
2.5
1,614
15 W Hemlock Street, Islip, NY
0.05
Single-Family Home
$530,000
09/19/25
4
1
1,248
36 Spruce Street, Islip, NY
0.25
Single-Family Home
$643,300
09/11/25
3
2
1,348
70 Islip Avenue, Islip, NY
0.36
Single-Family Home
$650,000
02/27/26
4
2
1,696

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 W Hemlock St, Islip, NY 11751
0.03
$532,100
4
1
1,128
Off Market
15 W Hemlock Street, Islip, NY 11751
0.05
$602,900
4
1
1,248
Off Market
11 W Hemlock Street, Islip, NY 11751
0.06
$415,000
3
2
912
Recently Sold
20 Jenkins Street, Islip, NY 11751
0.04
$602,900
3
2
-
Off Market
23 Robbins Avenue, Islip, NY 11751
0.07
$530,000
3
2
1,714
Recently Sold
7 W Hemlock Street, Islip, NY 11751
0.10
$935,700
4
2.5
-
Off Market
23 W Spruce Street, Islip, NY 11751
0.10
$605,400
2
1
-
Off Market
15 Robbins Avenue, Islip, NY 11751
0.08
$530,600
4
1
1,227
Off Market
2 W Elm Street, Islip, NY 11751
0.17
$651,600
3
1
1,430
Off Market
7 W Elm Street, Islip, NY 11751
0.18
$700,000
4
2
1,461
Recently Sold
120 Winganhauppauge Road, Islip, NY 11751
0.18
$734,100
3
3
1,629
Off Market
121 Commack Road, Islip, NY 11751
0.17
$704,100
3
1.5
-
Off Market

Local Information

  • Map ViewExplore the area around 15 William Ave.
  • Schools2 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1965
Living Area
1,996 sqft
Price/Sqft
$366

About this House

Move right into this meticulously maintained high ranch on a quiet street near everything. Completely renovated in 2017. Five bedroom, Two full baths, all new from top to bottom. New roof, siding, windows, boiler and tank, CAC, new kitchen with stainless appliances and granite counter tops, new bathrooms, hard wood floors, LED lighting, patio, alarm, in ground sprinklers ...
15 William Ave, Islip, NY 11751 is a 5 bedroom, 2 bathroom, 1,996 sqft single-family home built in 1965. It last sold for $480,000 on Jun 25, 2019. This property is not currently displayed as for sale or rent on Trulia. The Trulia Estimate is $731,500, with a rent estimate of $4,560/month.

Home Details for 15 William Ave

Interior Features

Heating & Cooling
Heating: OilAir ConditioningCooling System: CentralHeating Fuel: Oil
Interior Details
AtticTypes of Rooms: Dining Room
Appliances & Utilities
Refrigerator
Levels, Entrance, & Accessibility
Floors: Hardwood

Property Information

Year Built
Year Built: 1965
Property Type / Style
Property Type: Single Family HomeArchitecture: Other

Community

Units in Building: 1

Lot Information

Lot Area: 5227 sqft

Price and Tax history

DateEventPrice
Jun 25, 2019
Source: OneKey® MLS as distributed by MLS GRID #L3112605
Sold
$480,000
Mar 26, 2019
Source: Agent Provided
Listed For Sale
$474,000
Mar 13, 2017
Source: OneKey® MLS as distributed by MLS GRID #L2899768
Sold
$400,000
Dec 2, 2016
Source: Agent Provided
Listed For Sale
$409,000
Sep 23, 2016
Source: N/A
Sold
$254,000

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 15 William Ave

  • What is 15 William Ave estimated to be worth?
    Trulia's estimated value for 15 William Ave in Islip, NY is $731,500.
  • What is the price history for 15 William Ave?
    15 William Ave in Islip, NY last sold for $480,000 in June 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 15 William Ave have air conditioning?
    Yes, 15 William Ave in Islip, NY has air conditioning.
  • How big is the lot at 15 William Ave?
    The lot at 15 William Ave in Islip, NY is about 0.12 acres (5,227 sq ft).

Explore by feature - Air Conditioning

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