| Primary address | 417 Main Street, Islip |
| Zip code | 11751 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 370-1-83 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 03/19/2020 |
| Sale price | $1,150,000 |
| Arm's length | Register |
| Property tax | $27,762 |
| Building class | Downtown Row Type (Detached) (482) |
| Acreage | 0.33 |
| Zoning district | Register |
| School district | 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:
The current market value is $840,845.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
| Listing type | For Lease |
|---|---|
| Listing date | 11/12/2025 |
| Last updated | 04/14/2026 |
| Lot size | 0.33 Acre |
| Suite name | Space type | Lease rate | Available space | Brokers |
|---|---|---|---|---|
| Space Available | General Office | $22/Sqft/Year | 1,250 | Robert Monahan Robert Raffa |
Create a free account to view the complete sales history for 417 Main Street, Islip, including title documents, transfer conditions, mortgages and liens.
*Here are the three most recent sales for this property.
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 417 Main Street, Islip, NY 11751. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $27,762 |
| Market value | $840,845 |
| Assessed value | $59,700 |
Here's the assessment & property tax history for 417 Main Street, 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 | $840,845 | $59,700 | 40.799 | $24,357 | -1.35% |
| 2023-2024 | $820,055 | $59,700 | 41.357 | $24,690 | -2.03% |
| 2022-2023 | $721,015 | $59,700 | 42.213 | $25,201 | +4.32% |
| 2021-2022 | $643,319 | $59,700 | 40.466 | $24,158 | -0.71% |
| 2020-2021 | $615,464 | $59,700 | 40.757 | $24,332 | +6.26% |
The complete history of permits filed for 417 Main Street, 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.
| Total population | 13,726 |
| Median age | 45.6 |
| Average household income | $136,601 |
| Family households | 67.4% |
| Occupied housing units | 5,040 |
| Owner occupied units | 83.4% |
| Average number of people per household | 2.71 |
| Median year structure built | 1965 |
| Median value for units with a mortgage | $586,500 |
| Median value for units without a mortgage | $514,700 |
Create a free account to unlock extended information for 417 Main Street, 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 417 Main Street, 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 |
Here are the neighbors for 417 Main Street, Islip.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 64 Stellenwerf Ave, Islip Terrace | 08/04/2000 | $181,000 | |
| 71 Commercial Ave, East Islip | 1,343 | 09/25/2025 | |
| 6 Plume CT, Bay Shore | 09/27/2010 | $245,000 | |
| 65 Indiana Ave, Bay Shore | 08/03/2000 | $186,000 | |
| 603 Tower Mews, Oakdale | 08/26/2010 | ||
| 1400 N Clinton Ave, Bay Shore | 02/13/2001 | $140,000 | |
| 79 Macarthur Blvd, Hauppauge | 875 | 07/24/2024 | |
| 31 Val Ray Blvd, Central Islip | 02/23/2001 | $219,990 | |
| 38 Hoffman Ln, Central Islip | 3,058 | 03/09/2018 | $340,000 |
| 155 Higbie Ln, West Islip | 07/18/2014 | $399,000 | |
| 13 Kopf St, Brentwood | 2,272 | 12/18/2017 | $360,000 |
| 103 Old Broadway Ave, Sayville | 1,926 | 03/04/2025 | |
| 338 Amityville St, Islip Terrace | 08/28/2008 | $300,000 | |
| 223 Napoli St, Central Islip | 2,364 | 02/18/2026 | $300,000 |
| 91 Country Village Ln, East Islip | 06/27/2024 | $590,000 | |
| 694 Everdell Ave, West Islip | 09/12/2016 | $392,500 | |
| 1076 Ocean Ave, Bay Shore | 2,288 | 03/30/2022 | |
| 183 Geneva St, Bay Shore | 06/26/2000 | ||
| 70 Babylon St, Islip Terrace | 12/20/2002 | $245,000 | |
| 55 Rock Rd, Islip Terrace | 03/18/2024 |