| Primary address | 21 Duffy Court, Central Islip |
| Zip code | 11722 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 121-1-22 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Property tax | $9,297 |
| Building class | Two Family Year-Round Residence (220) |
| Acreage | 0.16 |
| Units | 2 |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
Assessed at $30,500, the tax amount paid for 21 Duffy Court, Central Islip, NY 11722 is $9,296.
When was 21 Duffy Court, Central Islip, NY 11722 last sold?21 Duffy Court, Central Islip, NY 11722 was last sold in 12/19/2002.
How many residential units does this building have?This building has 2 residential unit(s).
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 21 Duffy Court, Central Islip, including title documents, transfer conditions, mortgages and liens.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 21 Duffy Court, 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 | $9,297 |
| Market value | $429,577 |
| Assessed value | $30,500 |
Here's the assessment & property tax history for 21 Duffy Court, 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 |
|---|---|---|---|---|---|
| 2024-2025 | $429,577 | $30,500 | 29.569 | $9,019 | +5.71% |
| 2023-2024 | $418,956 | $30,500 | 27.973 | $8,532 | -1.12% |
| 2022-2023 | $368,358 | $30,500 | 28.29 | $8,628 | +0.97% |
| 2021-2022 | $328,664 | $30,500 | 28.019 | $8,546 | -2.89% |
| 2020-2021 | $314,433 | $30,500 | 28.854 | $8,800 | +3.66% |
The complete history of permits filed for 21 Duffy Court, 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.
Create a free account to unlock extended information for 21 Duffy Court, 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) |
Access the detailed traffic volume map for 21 Duffy Court, 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 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Francis J O Neill School | 5 | Public | K-6 | 614 | 0.12 |
| Our Lady Of Providence Regional School | NR | Private | PK-8 | 251 | 0.22 |
| Our Lady Of Providence Regional School | NR | Private | PK-8 | 251 | 0.22 |
| Charles A Mulligan School | 4 | Public | K-6 | 981 | 0.46 |
| Anthony Alfano Elementary School | 5 | Public | PK, K-6 | 586 | 0.53 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Our Lady Of Providence Regional School | NR | Private | PK-8 | 251 | 0.22 |
| Ralph Reed School | 3 | Public | 7-8 | 1,149 | 0.73 |
| Gersh Academy | NR | Private | 6-12 | 0 | 1.92 |
| East Middle School | 4 | Public | 6-8 | 1,159 | 1.99 |
| Hauppauge Middle School | 6 | Public | 6-8 | 748 | 2.48 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Central Islip Senior High School | 3 | Public | 9-12 | 2,576 | 0.80 |
| Gersh Academy | NR | Private | 6-12 | 0 | 1.92 |
| Hauppauge High School | 9 | Public | 9-12 | 1,079 | 2.33 |
| MDQ Academy | NR | Private | PK-12 | 412 | 2.59 |
| East Islip High School | 8 | Public | 9-12 | 1,145 | 2.74 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Duffy Court, Central Islip.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 182 Raymond St, Islip | 2,242 | 08/15/2018 | $477,000 |
| 70 Roosevelt Blvd, Hauppauge | 11/12/2015 | $303,000 | |
| 333 Wildwood Rd, Ronkonkoma | 2,030 | 05/27/2021 | $499,000 |
| 16 Voorhis Dr, Brentwood | 04/14/2005 | $336,990 | |
| 89 Brook St, West Sayville | 06/22/2016 | $429,000 | |
| 48 Cocoanut St, Central Islip | 829 | 08/19/2019 | |
| 498 Elmore St, Central Islip | 10/27/2011 | ||
| 1150 Brookdale Ave, Bay Shore | 02/02/2022 | ||
| 3 Carpenter Ln, Hauppauge | 10/18/2022 | $815,000 | |
| 1673 Elsie Ln, Bay Shore | 09/19/2014 | ||
| 175 Seville Blvd, Sayville | 06/12/2003 | $285,000 | |
| 186 Palmer Cir, Sayville | 08/16/2022 | ||
| 26 Robbins Walk, Bay Shore | 05/29/2008 | $632,500 | |
| 109 Utica St, Bay Shore | 12/04/2002 | ||
| 1349 N Monroe Ave, West Islip | 10/22/2012 | $400,000 | |
| 16 Maple CT, Bay Shore | 11/15/2002 | $450,000 | |
| 56 Stockton St, Brentwood | 05/27/2004 | $288,000 | |
| 716 Milligan Ln, West Islip | 06/28/2016 | $475,000 | |
| 96 Broadway, Bay Shore | 12/27/2002 | $380,000 | |
| 10 Booth St, Central Islip | 09/16/2013 |