20 William Ave, Central Islip, NY 11722
OFF MARKET

20 William Ave
Central Islip, NY 11722

  • 2 Beds
  • 1 Bath

$488,700

Trulia Estimate
as of Aug 19, 2026
Est. Refi. Payment $3,299/mo*
Refinance Your Home

$488,700

Trulia Estimate
as of Aug 19, 2026
Est. Refi. Payment $3,299/mo*
Refinance Your Home
2 Beds
1 Bath

Home Value

Trulia Estimate
$489K
Since last month
Increased$4K (+0.8%)
Since last year
Increased$21K (+4.5%)
Since last sale
Increased$310K (+167.7%)
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 +153% in the last 10 years
MonthEstimated value
2026
August 2026$495K
July 2026$491K
June 2026$495K
May 2026$497K
April 2026$483K
March 2026$479K
February 2026$478K
January 2026$472K
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
30 Oakdale Avenue, Central Islip, NY
0.10
Single-Family Home
$487,000
05/20/26
2
1
840
22 E Halley Lane, Central Islip, NY
0.24
Single-Family Home
$510,000
06/03/26
3
1
1,125
42 William Ave, Central Islip, NY
0.21
Single-Family Home
$135,600
08/27/25
4
2
-
13 Dietz Street, Central Islip, NY
0.07
Single-Family Home
$570,000
05/15/26
4
1.5
1,098
11 McGowan Lane, Central Islip, NY
0.51
Single-Family Home
$495,000
04/02/26
2
1
1,000
40 Church Street, Central Islip, NY
0.05
Single-Family Home
$620,000
04/02/26
4
2
1,602
60 Dietz Street, Central Islip, NY
0.13
Single-Family Home
$553,000
02/27/26
4
2
1,138
34 Hilliard Avenue, Central Islip, NY
0.18
Single-Family Home
$620,000
05/01/26
4
2
1,224
12 South Road, Central Islip, NY
0.51
Single-Family Home
$451,000
04/14/26
2
1
1,634
22 3rd Avenue, Central Islip, NY
0.45
Single-Family Home
$585,000
02/10/26
4
1
1,964

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
16 William Avenue, Central Islip, NY 11722
0.03
$619,000
3
2
1,604
Off Market
13 Dietz Street, Central Islip, NY 11722
0.07
$570,000
4
1.5
1,098
Recently Sold
40 Church Street, Central Islip, NY 11722
0.05
$620,000
4
2
1,602
Recently Sold
13 William Avenue, Central Islip, NY 11722
0.06
$635,100
4
1
1,304
Off Market
27 William Avenue, Central Islip, NY 11722
0.09
$630,000
4
3
1,327
Recently Sold
60 Dietz Street, Central Islip, NY 11722
0.13
$553,000
4
2
1,138
Recently Sold
19 Oakdale Avenue, Central Islip, NY 11722
0.08
$682,000
4
2
1,742
Off Market
30 Oakdale Avenue, Central Islip, NY 11722
0.10
$487,000
2
1
840
Recently Sold
5 Monsen Street, Central Islip, NY 11722
0.14
$621,100
4
2
10,890
Off Market
4 Mcgrath Street, Central Islip, NY 11722
0.16
$618,400
4
1
-
Off Market
39 Wheeler Road, Central Islip, NY 11722
0.16
$645,900
5
2
1,305
Off Market
33 Hilliard Ave, Central Islip, NY 11722
0.15
$778,500
7
4
1,600
Off Market

Local Information

  • Map ViewExplore the area around 20 William Ave.
  • Schools1 Preschool School2 Elementary Schools1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Property Type
Single-Family Home
Year Built
1965

About this House

Short Sale. Home Needs Work, Kitchen Gutted, 2 Bedroom, Full Bath, Full Basement, and Garage.
20 William Ave, Central Islip, NY 11722 is a 2 bedroom, 1 bathroom single-family home built in 1965. It last sold for $185,000 on Dec 19, 2016. It is currently off market. The Trulia Estimate is $488,700, with a rent estimate of $2,850/month.

Home Details for 20 William Ave

Interior Features

Heating & Cooling
Heating: OilHeating Fuel: Oil
Interior Details
Types of Rooms: Dining Room
Appliances & Utilities
DryerRefrigeratorWasher

Property Information

Year Built
Year Built: 1965
Property Type / Style
Property Type: Single Family HomeArchitecture: Ranch / Rambler

Community

Units in Building: 1

Lot Information

Lot Area: 9147 sqft

Price and Tax history

DateEventPrice
Sep 9, 2019
Source: Agent Provided
ListingRemoved
$150,000
May 21, 2019
Source: Agent Provided
Listed For Sale
$150,000
Dec 19, 2016
Source: OneKey® MLS as distributed by MLS GRID #L2840152
Sold
$185,000
Aug 7, 2016
Source: Agent Provided
PriceChange
$199,900
Price decreased by 5%
Mar 31, 2016
Source: Agent Provided
PriceChange
$209,900
Price decreased by 5%

Market trends in Central Islip

Last updated July 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
—
Sale-to-List Price
—
Price per sq ft
—
Available listings
63
2MoM

Around this home

What Locals Say about Central Islip

At least 347 Trulia users voted on each feature.

  • 85 % Say car is needed

  • 82 % Say parking is easy

  • 82 % Say yards are well-kept

  • 70 % Say it's dog friendly

  • 67 % Say there's holiday spirit

  • 58 % Say kids play outside

  • 56 % Say it's quiet

  • 56 % Say there are sidewalks

  • 51 % Say it's walkable to grocery stores

  • 48 % Say they plan to stay for at least 5 years

  • 47 % Say streets are well-lit

  • 46 % Say neighbors are friendly

  • 43 % Say it's walkable to restaurants

  • 41 % Say people would walk alone at night

  • 41 % Say there's wildlife

  • 32 % Say there are community events

Sourced by Trulia users. Learn more about our methodology.
  • Diesumi1976
    "I work 8 minutes away so is wonderful, on the other hand my wife is 45 minutes away but is not bad at all "
    0
    Flag
  • Joel Romero
    "This is a good place to have pets , dogs must love this place , there’s a lot of open space all around."
    0
    Flag
  • Naheim S.
    "I've lived here for 13 years and it's been truly a wonderful experience, neighbors are great safety is always paramount along with 24 hour security ensuring all resident are safe. The community is always clean & updated with trees and roads, i was truly lucky to get an opportunity to live here in this luxury town-home community."
    10
    Flag
  • Trulia User
    "LIRR is nearby. Buses are nearby and usually run every hour. However, a lot of patience and walking is required if you are taking public transportation."
    0
    Flag
  • Trulia User
    "Need a car to get around. Stores around but about half mile to a mile away. Can walk but in cold days it can be hard. Close to MTA and bus. Very noisy, with other homes and people around. "
    0
    Flag
  • Trulia User
    "Very nice houses and a dog/family park. The area is very save, train station and busses as well. A very nice school system."
    0
    Flag
  • Trulia User
    "quiet and friendly people. access to many stores and public transportation. close to all major highways. "
    0
    Flag
  • Trulia User
    "ive lived in this neighborhood for 15 years! great neighborhood , neighbors are friendly , all areas are clean! has good parks for children "
    0
    Flag
  • Trulia User
    "Short and a lot of traffic all the time, many accidents and the sirens don't stop, a lot of people walking, riding bikes, picking up bottles and all kind of stuff. "
    0
    Flag
  • Williamsmario20
    "A lot of space to walk your dogs. One thing I don’t like is a lot of dog owners have faulty fences and dogs do escape. "
    2
    Flag
  • Trulia User
    "Everyone looks out for each other. College woods is on little community within itself. People say what they want until you lived here and experienced the people then you can’t comment "
    14
    Flag
  • Emmanuelrosario2122
    "Everyone is friendly and there nice and sometimes dogs get out of there houses and there dangerous breeds "
    14
    Flag
  • Keila G.
    "Typically I don’t shop in this area but I do like that when there is a quick errand I need to do I have options. I always feel safe and it’s normally quiet in the area I live in. "
    3
    Flag
  • Shebuti
    "Although it is not a safe area I haven’t faced any issues during my 5 years stay in this area. It’s not the nicest community but it is cheap. If you are living in a gated community then it is quite safe."
    5
    Flag
  • Jonitoatias
    "Central Islip is a nice, multicultural neighborhood, but you would definitely need a car if you live here..."
    4
    Flag
  • Cew318
    "I do see people walking dogs in the area. I know there are a couple of parks in the area. You can also bring your dog into the pet store. "
    1
    Flag
  • Thatsmecutie
    "School system is terrible. Child was enrolled privately at first then ultimately homeschooled when I lived there. Lots for kids to do in surrounding areas though. Library, trampoline park, etc"
    1
    Flag
  • Thatsmecutie
    "Feel pretty safe here. The peripheral area is a little sketchy still. However, the area is being built up and that will hopefully change the surrounding areas. "
    3
    Flag
  • Emmaaa515
    "I hate this area it’s gross people don’t take care of it the town is run down I can not wait to move "
    0
    Flag
  • Maudlynne A.
    "I am not sure. People own dogs around the neighborhood but i don't often see them walking their dogs. it's a spacious street to walk dogs. "
    0
    Flag
  • Maudlynne A.
    "we mind our own business. if you ask for hp you will get it. it's very very quite and comfortable. we secretly look out for each other but don't want to admit it."
    10
    Flag
  • Maudlynne A.
    "LIRR is my transportation to and from work. it is safe and punctual most of the time. it's very expensive but I work in Jamaica Queens so I have no choice. The Commute itself is smooth and relaxing."
    0
    Flag
  • Martin W.
    "College woods in central Islip is a good area. The neighbors a really nice, always looking to extend a helping hand. And a lot of them have stories for days, which will help any single or couple fit right in. "
    11
    Flag
  • Julgomez2
    "its redidential everything is changing for the good. the school are better than how they were in the past."
    6
    Flag
  • Martin W.
    "College woods is a great location to live in Central Islip. My Neighbors are fantastic and very welcoming. "
    0
    Flag
  • Bejeanntte
    "there are many families.a big shopping center many supermarkets ...good schools.railroad near us...court house ....a big stadium"
    0
    Flag
  • Ashleyn
    "it's horrible here a lot of gangs, and druggies. it's dangerous here and would not recommend anyone move here."
    9
    Flag
  • Mr.jones.jones1989
    "There’s a lot of dog owners around where I live now and all dogs are welcomed here. No dogs Rome freely everyone cleans up behind there dogs"
    3
    Flag
  • Sexydova14043
    "That the area is safe for kids. Also that the school district is good. They should be able to walk around the community being safe"
    0
    Flag
  • Romerofam38
    "Very close to LIRR and major highways, also the federal courthouse. Great for commuting! Lots of new building coming in the next few years"
    1
    Flag
  • Lilianajtoro
    "The area is very quiet and neighbors look out for each other. Everybody has a great relationship and very friendly environment. "
    1
    Flag

LGBTQ Local Legal Protections

Frequently asked questions about 20 William Ave

  • What is 20 William Ave estimated to be worth?
    Trulia's estimated value for 20 William Ave in Central Islip, NY is $488,700.
  • What is the price history for 20 William Ave?
    20 William Ave in Central Islip, NY last sold for $185,000 in December 2016.
  • Is Central Islip a buyer's or seller's market?
    Central Islip is currently a seller's market, based on recent for-sale activity.
  • What do residents say about Central Islip?
    Residents describe Central Islip, NY as easy to park in, well-kept, and dog-friendly. Most residents say you need a car. See recently sold homes in Central Islip, NY.
  • Does 20 William Ave have laundry facilities?
    Yes, 20 William Ave in Central Islip, NY has in-unit laundry.
  • How big is the lot at 20 William Ave?
    The lot at 20 William Ave in Central Islip, NY is about 0.21 acres (9,147 sq ft).

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