| Primary address | 309 Main Street, Islip |
| Zip code | 11751 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 370-1-62 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 03/21/2024 |
| Sale price | $1,950,000 |
| Arm's length | Register |
| Property tax | $56,687 |
| Building sqft | 8,819 |
| Building class | Office Building (464) |
| Acreage | 0.56 |
| 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:
This Office Building (464) located at 309 Main Street, Islip, NY 11751 has a total of 8,819 square feet and a current price per square foot of $221.
What is the market value of 309 Main Street, Islip, NY 11751?The current market value is $1,716,901.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
| Listing type | For Lease |
|---|---|
| Listing date | 07/08/2025 |
| Last updated | 04/16/2026 |
| Lot size | 0.5051 Acre |
The office building is located on Main Street in Islip, NY, surrounded by retail shops, restaurants, and local businesses. Islip Town Hall West is just a short distance away. This prime location offers excellent visibility and foot traffic—ideal for client-facing businesses or professional services. Unmetered Municipal parking is under a five minute walk.Gross Lease
| Suite name | Space type | Lease rate | Available space | Brokers |
|---|---|---|---|---|
| Suite 2 | General Office | $20/Sqft/Year | 1,621 | Mario Vigliotta |
Create a free account to view the complete sales history for 309 Main Street, 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 309 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 | $56,687 |
| Market value | $1,716,901 |
| Assessed value | $121,900 |
Here's the assessment & property tax history for 309 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 | $1,716,901 | $121,900 | 40.799 | $49,734 | -1.35% |
| 2023-2024 | $1,674,450 | $121,900 | 41.357 | $50,414 | -2.03% |
| 2022-2023 | $1,472,222 | $121,900 | 42.213 | $51,458 | +4.32% |
| 2021-2022 | $1,313,578 | $121,900 | 40.466 | $49,328 | -0.71% |
| 2020-2021 | $1,256,701 | $121,900 | 40.757 | $49,683 | +6.26% |
The complete history of permits filed for 309 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 309 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 309 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 309 Main Street, Islip.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 80 Grant Ave, Islip | 12/30/2022 | $700,000 | |
| 68 Pardee Ave, Islip | |||
| 81 N Ocean Ave, Islip | 06/10/2025 | ||
| 66 Grant Ave, Islip | 12/03/2013 | $241,000 | |
| 48 Grant Ave, Islip | 07/23/2024 | ||
| 90 Grant Ave, Islip | 2,157 | 04/09/2021 | |
| 425 Main St, Islip | |||
| 8 Dwight CT, Islip | 08/10/2022 | $489,000 | |
| 85 N Ocean Ave, Islip | 01/26/2011 | $247,000 | |
| 76 Grant Ave, Islip | 03/05/2024 | ||
| 16 Grant Ave, Islip | |||
| 48 N Ocean Ave, Islip | 06/30/2011 | $340,000 | |
| 24 Pardee Ave, Islip | 03/21/2024 | $1,950,000 | |
| 56 N Ocean Ave, Islip | |||
| 375 Main St, Islip | 01/20/2005 | $147,000 | |
| 66 Pardee Ave, Islip | 976 | 08/22/2022 | $447,500 |
| 401 Main St, Islip | |||
| 66 N Ocean Ave, Islip | 07/23/2025 | ||
| 97 N Ocean Ave, Islip | 10/08/1993 | $90,000 | |
| 61 N Ocean Ave, Islip | 07/18/2022 | $540,000 |