9 William Ave, Islip, NY 11751
OFF MARKET

9 William Ave
Islip, NY 11751

  • Studio

$643,700

Trulia Estimate
as of Aug 11, 2026
Est. Refi. Payment $4,271/mo*
Refinance Your Home

$643,700

Trulia Estimate
as of Aug 11, 2026
Est. Refi. Payment $4,271/mo*
Refinance Your Home
Studio

Local Information

  • Map ViewExplore the area around 9 William Ave.
  • Schools2 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Multi-Family

About this House

This multi-family home is located at 9 William Ave, Islip, NY. 9 William Ave is in Islip, NY and in ZIP code 11751. This property has a lot size of 6098 sqft.
9 William Ave, Islip, NY 11751 is a studio multi-family. It last sold for $305,000 on Feb 19, 2004. It is currently off market. The Trulia Estimate is $643,700, with a rent estimate of $3,267/month.

Home Details for 9 William Ave

Property Information

Property Type / Style
Property Type: Multi Family

Community

Units in Building: 1

Lot Information

Lot Area: 6098 sqft

Price History for 9 William Ave

DatePriceEventSource
02/19/2004$305,000Sold
N/A

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$42,700
Home facts updated by county records

Comparable Sales for 9 William Ave

Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
23 Robbins Avenue, Islip, NY
0.09
Multi-Family Home
$530,000
07/16/26
3
2
1,714
173 Ferndale Blvd, Islip, NY
0.55
Multi-Family Home
$430,000
04/02/26
-
-
49 Freeman Ave, Islip, NY
0.46
Multi-Family Home
$500,000
08/19/25
-
-
113 Islip Ave, Islip, NY
0.27
Multi-Family Home
$640,000
01/08/26
4
2
2,000
25 1st Street, Islip, NY
0.88
Multi-Family Home
$580,000
12/16/25
2
2
1,542
73-75 Washington Street, East Islip, NY
1.44
Multi-Family Home
$750,000
06/04/26
4
4
2,309
39 Chapman Place, Bay Shore, NY
1.64
Multi-Family Home
$683,500
03/30/26
5
2
2,799
44 Chapman Place, Bay Shore, NY
1.67
Multi-Family Home
$500,000
01/09/26
-
1,755
57 Fischer Avenue, Islip Terrace, NY
1.39
Multi-Family Home
$840,000
02/18/26
7
3
2,456
1409 Saxon Ave, Bay Shore, NY
1.51
Multi-Family Home
$700,000
08/28/25
6
3
3,000

Nearby homes

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Assigned Schools

These are the assigned schools for 9 William 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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Apartments for Rent

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Off Market Homes Near 9 William Ave

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Frequently asked questions about 9 William Ave

  • What is 9 William Ave estimated to be worth?
    Trulia's estimated value for 9 William Ave in Islip, NY is $643,700.
  • What is the price history for 9 William Ave?
    9 William Ave in Islip, NY last sold for $305,000 in February 2004.
  • 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.