| Primary address | 340 Washington Avenue, Brentwood |
| Zip code | 11717 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 74-1-9 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 03/26/2025 |
| Sale price | $2,200,000 |
| Arm's length | Register |
| Property tax | $48,606 |
| Building class | Office Building (464) |
| Acreage | 0.95 |
| Zoning district | Register |
| School district | Brentwood |
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 $2,253,521.
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
| Listing type | For Lease |
|---|---|
| Listing date | 11/03/2022 |
| Last updated | 04/14/2026 |
| Lot size | 0.92 Acre |
| Suite name | Space type | Lease rate | Available space | Brokers |
|---|---|---|---|---|
| Full Building | Retail | $54.55/Sqft/Year | 3,300 | Roger A. Delisle Jr. |
Create a free account to view the complete sales history for 340 Washington Avenue, Brentwood, including title documents, transfer conditions, mortgages and liens.
| Purchase date | Purchase price | Buyer name | Seller name |
|---|---|---|---|
| 03/26/2025 | $2,200,000 | 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 340 Washington Avenue, Brentwood, NY 11717. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $48,606 |
| Market value | $2,253,521 |
| Assessed value | $160,000 |
Here's the assessment & property tax history for 340 Washington Avenue, Brentwood, 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 | $2,253,521 | $160,000 | 23.349 | $37,358 | -13.12% |
| 2023-2024 | $2,197,802 | $160,000 | 26.876 | $43,002 | -3.91% |
| 2022-2023 | $1,932,367 | $160,000 | 27.969 | $44,750 | -9.34% |
| 2021-2022 | $1,724,138 | $160,000 | 30.851 | $49,362 | -2.12% |
| 2020-2021 | $1,649,485 | $160,000 | 31.519 | $50,430 | +3.37% |
The complete history of permits filed for 340 Washington Avenue, Brentwood, 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 340 Washington Avenue, Brentwood, 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 340 Washington Avenue, Brentwood 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 340 Washington Avenue, Brentwood.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 48 Winthrop Rd, Brentwood | |||
| 26 Island Ave, Brentwood | |||
| 53 Rutledge St, Brentwood | 07/31/2024 | $545,000 | |
| 286 Washington Ave, Brentwood | 1,496 | 10/16/2025 | $585,000 |
| 50 Rutledge St, Brentwood | 2,700 | 08/06/2021 | $585,000 |
| 339 Washington Ave, Brentwood | 02/03/2017 | $1,400,000 | |
| 24 Winthrop Rd, Brentwood | 07/07/2022 | $540,000 | |
| 66 Walton St, Brentwood | |||
| 253 Washington Ave, Brentwood | 10/05/2024 | ||
| 315 Washington Ave, Brentwood | 12/29/2015 | $1,561,097 | |
| 35 Rutledge St, Brentwood | 1,952 | 10/15/2020 | |
| 59 Rutledge St, Brentwood | |||
| 60 Walton St, Brentwood | 936 | 12/20/2019 | $368,000 |
| 52 Winthrop Rd, Brentwood | |||
| 36 Rutledge St, Brentwood | |||
| 265 Madison Ave, Brentwood | 08/18/2014 | $258,000 | |
| 329 Washington Ave, Brentwood | |||
| 40 Winthrop Rd, Brentwood | |||
| 64 Walton St, Brentwood | 1,056 | 04/30/2025 | |
| 39 Rutledge St, Brentwood | 01/31/2017 | $290,000 |