Suffolk County  »  11722  »  William St  »  11 William St

11 William Street, Central Islip, NY 11722 Property Information

11 William Street, Central Islip, NY 11722 Property Information

  • General
  • Owner
  • Documents
  • Tax
  • Permits
  • Neighborhood
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11 William Street, Central Islip, NY 11722
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Address

Primary address 11 William Street, Central Islip
Zip code 11722
County Suffolk
Municipality Islip
Parcel ID 99-2-27

Sales & Tax Overview for 11 William Street, Central Islip

View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.

Property tax $8,779

Lot & Building Information for 11 William Street, Central Islip

Building class One Family Year-Round Residence (210)
Acreage 0.29
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Zoning, Use & Area Overview

Walk Score
32 /100. Car-Dependent
Transit Score
0 /100. Minimal Transit
Bike Score
43 /100. Somewhat Bikeable

Zoning district
School district Central Islip

View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.

Other Property Data for 11 William Street, Central Islip

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About 11 William Street, Central Islip

What is the assessed value of 11 William Street, Central Islip, NY 11722 and the property tax paid?

Assessed at $28,800, the tax amount paid for 11 William Street, Central Islip, NY 11722 is $8,778.

When was 11 William Street, Central Islip, NY 11722 last sold?

11 William Street, Central Islip, NY 11722 was last sold in 11/30/2011.

Ownership Information

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Real Estate Reports:
Brooklyn Emerges as NYC’s Coworking Growth Engine, Manhattan Rents Cross $100 in the Plaza District 
Lucian Alixandrescu, Jul 28, 2026 Brooklyn Emerges as NYC’s Coworking Growth Engine, Manhattan Rents Cross $100 in the Plaza District 
New York City’s office market continued to lead the U.S. in Q2, but internal shifts were most visible in the flex office market. Brooklyn’s coworking inventory grew 6.2% Q-o-Q even as Manhattan’s supply retreated. At the same time, Brooklyn’s asking rents for traditional office leases climbed more than twice as fast as the national average.
Prices Rise in 32 of NYC’s Leading Neighborhoods as City and Manhattan Hit Record Highs
Eliza Theiss, Jul 22, 2026 Prices Rise in 32 of NYC’s Leading Neighborhoods as City and Manhattan Hit Record Highs
Q2 2026 saw NYC and Manhattan reach historic highs, with Brooklyn and Queens marking close to new records as well. Meanwhile, Hudson Yards remained at the top, Central Midtown posted its highest price ever and Carroll Gardens marked its third consecutive quarter over $2 million
How to Find Property Owners — The Complete Guide 
Laura Pop-Badiu, Jul 15, 2026 How to Find Property Owners — The Complete Guide 
For real estate professionals looking for the best ways to find property owners — whether through free methods based on public sources or paid tools with verified, in-depth data — this comprehensive guide breaks down every step of the due diligence process.
Research 100M+ property records powered by:
  • 2000+ governmental and public data sources
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Past Sales & Property History for 11 William Street, Central Islip

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No recorded sales for this property.

More about Suffolk County Property Records

Title Documents for 11 William Street, Central Islip

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Date Type Amount Party 1 Party 2 Doc image
01/04/2012 - R
11/30/2011 - D		 Deed
           
           
           
           
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R: Recorded date
D: Document date

Property Taxes for 11 William Street, Central Islip

Access detailed property tax data for 11 William Street, Central Islip, NY 11722. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year 2025-2026
Property tax $8,779
Market value $405,634
Assessed value $28,800

More about Suffolk County Property Taxes

Assessment History for 11 William Street, Central Islip

Here's the assessment & property tax history for 11 William Street, Central Islip, including the evolution of the total tax rate and corresponding property tax.

Year Market value Assessment value Total tax rate Property tax Year over year change
2025-2026 $405,634 $28,800 30.481 $8,779 +3.08%
2024-2025 $405,634 $28,800 29.569 $8,516 +5.71%
2023-2024 $395,604 $28,800 27.973 $8,056 -1.12%
2022-2023 $347,826 $28,800 28.29 $8,148 +0.97%
2021-2022 $310,345 $28,800 28.019 $8,069 -2.89%
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Permits for 11 William Street, Central Islip

The complete history of permits filed for 11 William Street, Central Islip, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.

Data not available for this property.

Risk

Create a free account to unlock extended information for 11 William Street, Central Islip, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).

FEMA flood zone(s) X (See more on map)

Transportation

Access the detailed traffic volume map for 11 William Street, Central Islip to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

View daily traffic map

Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance (miles)
Charles A Mulligan School 4 Public K-6 981 0.14
Francis J O Neill School 5 Public K-6 614 0.30
Our Lady Of Providence Regional School NR Private PK-8 251 0.55
Our Lady Of Providence Regional School NR Private PK-8 251 0.55
Anthony Alfano Elementary School 5 Public PK, K-6 586 0.55
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Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
Ralph Reed School 3 Public 7-8 1,149 0.37
Our Lady Of Providence Regional School NR Private PK-8 251 0.55
Gersh Academy NR Private 6-12 0 1.57
Hauppauge Middle School 6 Public 6-8 748 2.15
East Middle School 4 Public 6-8 1,159 2.20
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Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
Central Islip Senior High School 3 Public 9-12 2,576 0.66
Gersh Academy NR Private 6-12 0 1.57
Hauppauge High School 9 Public 9-12 1,079 2.01
MDQ Academy NR Private PK-12 412 2.84
East Islip High School 8 Public 9-12 1,145 3.04
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Data provided by GreatSchools.org © 2025. All rights reserved.

Neighbors for 11 William Street, Central Islip

Here are the neighbors for 11 William Street, Central Islip.

Address Square feet Purchase date Purchase price
7 William St, Central Islip 03/31/2014 $123,600
21 Hawthorne Ave, Central Islip 2,161 01/14/2020 $380,000
118 E Suffolk Ave, Central Islip 5,163 06/30/2016 $665,000
30 Lurcott Ln, Central Islip 2,103
4 Pineville Rd, Central Islip 02/02/2020
5159 Hawthorne Ave, Central Islip 09/14/2018 $463,000
25 Hawthorne Ave, Central Islip 03/25/2026 $689,000
5 Short St, Central Islip 03/14/1998
27 Hawthorne Ave, Central Islip
46 Lurcott Ln, Central Islip 2,015 09/30/2022 $405,000
43 Lurcott Ln, Central Islip 1,547 12/27/2019 $328,000
90 Suffolk Ave, Central Islip 03/09/2023
60 E Suffolk Ave, Central Islip 10/11/2024 $435,000
34 Lurcott Ln, Central Islip 1,315 06/28/2017
22 Lurcott Ln, Central Islip 1,616 11/28/2018 $270,000
22 William St, Central Islip 1,210 03/21/2017 $233,200
10 William St, Central Islip 12/05/2023
92 E Suffolk Ave, Central Islip 2,800 01/10/2022 $800,000
100 Suffolk Ave, Central Islip 615 10/20/2016 $900,000
14 William St, Central Islip 1,590 01/31/2022 $418,000
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Nearby ZIP Codes for 11 William Street, Central Islip

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