| Primary address | 21 South Street, West Islip |
| Zip code | 11795 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 454-2-56 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Current property tax | $11,148 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.38 |
| 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:
Assessed at $41,350, the tax amount paid for 21 South Street, West Islip, NY 11795 is $11,976.
When was 21 South Street, West Islip, NY 11795 last sold?21 South Street, West Islip, NY 11795 was last sold in 12/29/1992.
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 South Street, 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 21 South Street, West Islip, NY 11795. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Base tax | $11,976 |
| Current property tax | $11,148 |
| Market value | $582,395 |
| Assessed value | $41,350 |
Here's the assessment & property tax history for 21 South Street, 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 | $582,395 | $41,350 | 27.624 | $11,423 | +3.86% |
| 2023-2024 | $567,995 | $41,350 | 26.598 | $10,998 | +1.06% |
| 2022-2023 | $499,396 | $41,350 | 26.319 | $10,883 | +0.07% |
| 2021-2022 | $445,582 | $41,350 | 26.301 | $10,875 | +2.12% |
| 2020-2021 | $426,289 | $41,350 | 25.754 | $10,649 | -23.63% |
The complete history of permits filed for 21 South Street, 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 21 South Street, 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 21 South Street, 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) |
|---|---|---|---|---|---|
| Paul J Bellew Elementary School | 7 | Public | PK, K-5 | 456 | 0.32 |
| Paul J Bellew Elementary School | 7 | Public | PK, K-5 | 456 | 0.32 |
| Babylon Christian School | NR | Private | PK, K-5 | 90 | 0.86 |
| Babylon Christian School | NR | Private | PK, K-5 | 90 | 0.86 |
| South Bay Jr Academy Of Sda | NR | Private | PK-8 | 56 | 1.08 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Beach Street Middle School | 6 | Public | 6-8 | 405 | 0.39 |
| Babylon Junior Senior High School | 5 | Public | 7-12 | 703 | 0.92 |
| South Bay Jr Academy Of Sda | NR | Private | PK-8 | 56 | 1.08 |
| Bridges Academy (The) | NR | Private | PK-8 | 211 | 1.31 |
| The Bridges Academy | NR | Private | PK, K-8 | 0 | 1.31 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| West Islip Senior High School | 9 | Public | 9-12 | 1,262 | 0.36 |
| Babylon Junior Senior High School | 5 | Public | 7-12 | 703 | 0.92 |
| St John The Baptist Diocesan High School | NR | Private | 9-12 | 1,335 | 1.06 |
| North Babylon High School | 6 | Public | 9-12 | 1,506 | 1.80 |
| West Babylon Senior High School | 7 | Public | 9-12 | 1,247 | 1.90 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 South Street, West Islip.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 260 Maple St, Islip | 2,297 | 03/11/2022 | $670,000 |
| 7 Weldon St, Islip | 12/16/1992 | $145,000 | |
| 18 Vita Dr, Central Islip | 11/26/2024 | $620,000 | |
| 507 Ralph Ave, Central Islip | 02/20/2002 | ||
| 149 Timber Ridge Dr, Holbrook | 07/09/2010 | $329,000 | |
| 35 Enfield Ln, Hauppauge | 07/06/2009 | $625,000 | |
| 581 Walnut Ave, Bohemia | 04/02/2001 | ||
| 16 Ridgewood Ave, Brentwood | 12/22/1992 | $120,000 | |
| 51 Monroe Ave, Brentwood | 12/07/1992 | $130,000 | |
| 1764 Stein Dr, Bay Shore | 2,033 | 07/26/2019 | $355,000 |
| 309 Oak Neck Rd, West Islip | 1,296 | 04/27/2021 | $175,000 |
| 68 Beatrice Ave, West Islip | 11/16/2006 | $360,000 | |
| 732 Milligan Ln, West Islip | 1,995 | 05/24/2019 | $445,000 |
| 700 Keith Ln, West Islip | 04/12/2001 | ||
| 30 Karp Dr, Islip Terrace | 05/27/2014 | ||
| 3 Budenos Dr, Sayville | 12/22/1992 | $135,000 | |
| 26 Lindsey CT, Holtsville | 06/03/2025 | $549,000 | |
| 1421 Lombardy Blvd, Bay Shore | 906 | 05/26/2021 | $370,000 |
| 2 Cottage Ave, Bay Shore | 12/21/1992 | $145,000 | |
| 141 5th Ave, Bay Shore | 09/12/2025 |