| Primary address | 20 Duffin Avenue, West Islip |
| Zip code | 11795 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 414-1-100 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 05/09/2023 |
| Sale price | $619,000 |
| Arm's length | Register |
| Property tax | $12,367 |
| Building class | Two Family Year-Round Residence (220) |
| Acreage | 0.25 |
| Year built | 1955 |
| Units | 2 |
| Zoning district | Register |
| School district | West Islip |
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:
20 Duffin Avenue, West Islip, NY 11795 was built in 1955.
What is the assessed value of 20 Duffin Avenue, West Islip, NY 11795 and the property tax paid?Assessed at $42,700, the tax amount paid for 20 Duffin Avenue, West Islip, NY 11795 is $12,367.
When was 20 Duffin Avenue, West Islip, NY 11795 last sold and what was the last sale price?20 Duffin Avenue, West Islip, NY 11795 was last sold in 05/09/2023 for $619,000.
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 20 Duffin Avenue, West 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 20 Duffin Avenue, West Islip, NY 11795. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $12,367 |
| Market value | $601,408 |
| Assessed value | $42,700 |
Here's the assessment & property tax history for 20 Duffin Avenue, West 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 | $601,408 | $42,700 | 27.624 | $11,795 | +11.71% |
| 2023-2024 | $545,330 | $39,700 | 26.598 | $10,559 | +1.06% |
| 2022-2023 | $479,469 | $39,700 | 26.319 | $10,449 | +0.07% |
| 2021-2022 | $427,802 | $39,700 | 26.301 | $10,441 | +2.12% |
| 2020-2021 | $409,278 | $39,700 | 25.754 | $10,224 | -23.63% |
The complete history of permits filed for 20 Duffin Avenue, West 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 20 Duffin Avenue, West 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 20 Duffin Avenue, West 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) |
|---|---|---|---|---|---|
| Oquenock Elementary School | 3 | Public | PK, K-5 | 397 | 0.47 |
| Oquenock Elementary School | 3 | Public | PK, K-5 | 397 | 0.47 |
| Our Lady Of Lourdes School | NR | Private | PK-8 | 209 | 0.86 |
| Our Lady Of Lourdes School | NR | Private | PK-8 | 209 | 0.86 |
| Manetuck Elementary School | 5 | Public | PK, K-5 | 496 | 0.98 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Beach Street Middle School | 6 | Public | 6-8 | 405 | 0.73 |
| Our Lady Of Lourdes School | NR | Private | PK-8 | 209 | 0.86 |
| Udall Road Middle School | 6 | Public | 6-8 | 445 | 1.27 |
| Babylon Junior Senior High School | 5 | Public | 7-12 | 703 | 1.44 |
| South Bay Jr Academy Of Sda | NR | Private | PK-8 | 56 | 1.74 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| West Islip Senior High School | 9 | Public | 9-12 | 1,262 | 0.96 |
| North Babylon High School | 6 | Public | 9-12 | 1,506 | 1.25 |
| Babylon Junior Senior High School | 5 | Public | 7-12 | 703 | 1.44 |
| St John The Baptist Diocesan High School | NR | Private | 9-12 | 1,335 | 1.58 |
| West Babylon Senior High School | 7 | Public | 9-12 | 1,247 | 2.16 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 20 Duffin Avenue, West Islip.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 11 Gerek Ave, West Islip | |||
| 72 Udall Rd, West Islip | 1,584 | 11/02/2023 | $650,000 |
| 23 Country Greens CT, West Islip | |||
| 13 Gerek Ave, West Islip | 04/10/2012 | ||
| 287 Curtin Ave, West Islip | |||
| 283 Curtin Ave, West Islip | 12/02/2022 | ||
| 271 Curtin Ave, West Islip | 1,984 | ||
| 291 Curtin Ave, West Islip | 10/23/2015 | $365,000 | |
| 4 Country Greens CT, West Islip | 1,985 | ||
| 11 Country Greens CT, West Islip | |||
| 18 Duffin Ave, West Islip | 1,437 | 01/09/2018 | $384,000 |
| 12 Country Greens CT, West Islip | |||
| 130 Sunrise Hwy, West Islip | 16,448 | 07/07/2017 | $6,000,000 |
| 15 Country Greens CT, West Islip | 06/18/2019 | ||
| 28 Country Greens CT, West Islip | 1,777 | 09/07/2021 | $550,000 |
| 16 Duffin Ave, West Islip | 1,437 | ||
| 25 Gerek Ave, West Islip | 1,960 | 07/17/2024 | $825,076 |
| 275 Curtin Ave, West Islip | 1,383 | 08/06/2019 | $430,000 |
| 124 Sunrise Hwy, West Islip | 6,855 | 02/11/2020 | |
| 110 Sunrise Hwy, West Islip | 5,041 | 03/14/1996 |