| Primary address | 1 Grant Avenue, Islip |
| Zip code | 11751 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 370-1-88.1 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 05/28/2008 |
| Sale price | $460,000 |
| Arm's length | Register |
| Property tax | $25,856 |
| Building class | One Story Small Structure - Multi Occupant (485) |
| Acreage | 0.1 |
| 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 $783,099.
How many commercial spaces does this building have?This building has 2 commercial spaces available for lease. There are 2 active listings at this address.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
| Listing type | For Lease |
|---|---|
| Listing date | 04/22/2026 |
| Last updated | 04/22/2026 |
| Suite name | Space type | Lease rate | Available space | Brokers |
|---|---|---|---|---|
| #3B | Retail | Listing price not available | 1,060 | Marissa Cosentino |
| #3C | Retail | Listing price not available | 235 | Marissa Cosentino |
Create a free account to view the complete sales history for 1 Grant Avenue, Islip, including title documents, transfer conditions, mortgages and liens.
| Purchase date | Purchase price | Buyer name | Seller name |
|---|---|---|---|
| 05/28/2008 | $460,000 | Register | Register |
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 1 Grant Avenue, Islip, NY 11751. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $25,856 |
| Market value | $783,099 |
| Assessed value | $55,600 |
Here's the assessment & property tax history for 1 Grant Avenue, 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 | $783,099 | $55,600 | 40.799 | $22,684 | -1.35% |
| 2023-2024 | $763,737 | $55,600 | 41.357 | $22,994 | -2.03% |
| 2022-2023 | $671,498 | $55,600 | 42.213 | $23,470 | +4.32% |
| 2021-2022 | $599,138 | $55,600 | 40.466 | $22,499 | -0.71% |
| 2020-2021 | $573,196 | $55,600 | 40.757 | $22,661 | +6.26% |
The complete history of permits filed for 1 Grant Avenue, 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 1 Grant Avenue, 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 1 Grant Avenue, 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 1 Grant Avenue, Islip.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 13 Van Buren St, Brentwood | 09/08/2015 | $240,000 | |
| 19 Dexter CT, Hauppauge | 07/09/2013 | $469,000 | |
| 47 John St, Sayville | 12/06/2016 | ||
| 1461 Walnut Ave, Bohemia | 1,557 | 09/29/2017 | $475,000 |
| 13 Ash St, Central Islip | 1,200 | 09/28/2018 | $279,900 |
| 40 Rockaway St, Islip Terrace | 05/19/2008 | $430,000 | |
| 315 Ellsworth St, Holbrook | 08/20/2018 | $200,000 | |
| 28 Girard Ave, Bay Shore | 04/11/2013 | ||
| 7 Winmar Ln, Sayville | 06/21/2024 | $1,210,000 | |
| 78 Bridge Rd, Hauppauge | 11/17/2006 | $385,000 |