| Primary address | 21 Keswick Drive, East Islip |
| Zip code | 11730 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 374-3-44 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Current property tax | $9,113 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.25 |
| Zoning district | Register |
| School district | East 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 $35,400, the tax amount paid for 21 Keswick Drive, East Islip, NY 11730 is $9,896.
When was 21 Keswick Drive, East Islip, NY 11730 last sold?21 Keswick Drive, East Islip, NY 11730 was last sold in 09/09/2002.
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 Keswick Drive, East 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 Keswick Drive, East Islip, NY 11730. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Base tax | $9,897 |
| Current property tax | $9,113 |
| Market value | $498,592 |
| Assessed value | $35,400 |
Here's the assessment & property tax history for 21 Keswick Drive, East 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 | $498,592 | $35,400 | 26.849 | $9,505 | +2.69% |
| 2023-2024 | $486,264 | $35,400 | 26.145 | $9,255 | +0.84% |
| 2022-2023 | $427,536 | $35,400 | 25.927 | $9,178 | -0.72% |
| 2021-2022 | $381,465 | $35,400 | 26.114 | $9,244 | +2.36% |
| 2020-2021 | $364,948 | $35,400 | 25.513 | $9,032 | -20.34% |
The complete history of permits filed for 21 Keswick Drive, East 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 Keswick Drive, East 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 Keswick Drive, East 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) |
|---|---|---|---|---|---|
| Timber Point Elementary School | NR | Public | PK, K-2 | 345 | 0.58 |
| Timber Point Elementary School | NR | Public | PK, K-2 | 345 | 0.58 |
| Chatterbox Day School | NR | Private | PK, K-1 | 0 | 0.69 |
| Chatterbox Day School | NR | Private | PK, K-1 | 0 | 0.69 |
| Chatterbox Day School | NR | Private | PK-1 | 61 | 0.70 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| St Mary School | NR | Private | PK-8 | 413 | 1.29 |
| East Islip Middle School | 6 | Public | 6-8 | 804 | 1.40 |
| Connetquot Alternative Preschool At Premm | NR | Public | 0 | 2.45 | |
| Oakdale Bohemia Middle School | 6 | Public | 6-8 | 634 | 2.47 |
| Islip Middle School | 4 | Public | 6-8 | 641 | 2.69 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| East Islip High School | 8 | Public | 9-12 | 1,145 | 1.51 |
| Connetquot Alternative Preschool At Premm | NR | Public | 0 | 2.45 | |
| Islip High School | 9 | Public | 9-12 | 892 | 2.67 |
| Connetquot High School | 8 | Public | 9-12 | 1,757 | 4.05 |
| Sayville High School | 9 | Public | 9-12 | 880 | 4.10 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Keswick Drive, East Islip.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 125 Hilltop Dr, Brentwood | 05/15/2013 | $255,000 | |
| 211 Massachusetts Ave, Bay Shore | 10/08/2010 | $300,000 | |
| 45 Freeman Ave, Islip | 2,772 | 01/07/2021 | |
| 51 Macon St, Sayville | 06/18/2002 | $229,000 | |
| 1603 5th Ave, Bay Shore | 11/15/2018 | $1,200,000 | |
| 743 Connetquot Ave, Islip Terrace | 07/28/2005 | ||
| 1381 Potter Blvd, Bay Shore | 10/04/2023 | $455,000 | |
| 58 Atlantic Ave, West Sayville | 01/04/2008 | $335,000 | |
| 4 Willoughby St, Brentwood | 2,536 | 12/19/2017 | $375,000 |
| 857 Udall Rd, West Islip | 08/30/2002 | ||
| 157 Cherokee St, Ronkonkoma | 08/21/2002 | $370,000 | |
| 151 Allwood Ave, Central Islip | 1,368 | 02/10/2022 | $480,000 |
| 776 Commack Rd, Brentwood | 03/31/2005 | ||
| 162 Floyd St, Brentwood | 2,361 | 01/22/2018 | $365,000 |
| 52 Elm St, Central Islip | 08/30/2002 | $210,000 | |
| 44 Leopold Ave, West Islip | 06/25/2010 | ||
| 271 Blake Ave, Bohemia | 02/22/2008 | ||
| 892 Hampshire Rd, Bay Shore | 08/15/2002 | $349,000 | |
| 226 Deer Rd, Ronkonkoma | 09/06/2002 | $250,000 | |
| 11 Madison Ave, Brentwood | 02/16/2005 |