| Primary address | 5 William Street, Brentwood |
| Zip code | 11717 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 114-2-24 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 05/29/2018 |
| Sale price | $307,400 |
| Arm's length | Register |
| Property tax | $6,934 |
| Building sqft | 1,810 |
| Building class | Two Family Year-Round Residence (220) |
| Acreage | 0.28 |
| Year built | 1940 |
| Units | 2 |
| 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:
5 William Street, Brentwood, NY 11717 was built in 1940 and has a total of 1,810 square feet.
What is the assessed value of 5 William Street, Brentwood, NY 11717 and the property tax paid?Assessed at $29,550, the tax amount paid for 5 William Street, Brentwood, NY 11717 is $6,933.
When was 5 William Street, Brentwood, NY 11717 last sold?5 William Street, Brentwood, NY 11717 was last sold in 10/08/2021.
How many residential units does this building have?This building has 2 residential unit(s).
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 5 William Street, Brentwood, 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 5 William Street, Brentwood, NY 11717. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Property tax | $6,934 |
| Market value | $416,198 |
| Assessed value | $29,550 |
Here's the assessment & property tax history for 5 William Street, 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 | $416,198 | $29,550 | 22.743 | $6,721 | +4.85% |
| 2023-2024 | $405,907 | $29,550 | 21.691 | $6,410 | -0.19% |
| 2022-2023 | $356,884 | $29,550 | 21.733 | $6,422 | +2.00% |
| 2021-2022 | $318,426 | $29,550 | 21.306 | $6,296 | +1.39% |
| 2020-2021 | $304,639 | $29,550 | 21.013 | $6,209 | +4.58% |
The complete history of permits filed for 5 William Street, 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 5 William Street, 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 5 William Street, 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 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Twin Pines Elementary School | 4 | Public | 1-5 | 744 | 0.20 |
| Pine Park Elementary School | NR | Public | K-1 | 534 | 0.29 |
| North Elementary School | 4 | Public | 1-5 | 855 | 0.99 |
| Northeast Elementary School | 4 | Public | 1-5 | 942 | 1.34 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.46 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Freshman Center | NR | Public | 9 | 1,247 | 0.16 |
| North Middle School | 4 | Public | 6-8 | 1,131 | 0.51 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.46 |
| South Middle School | 3 | Public | 6-8 | 1,033 | 1.50 |
| East Middle School | 4 | Public | 6-8 | 1,159 | 1.61 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Freshman Center | NR | Public | 9 | 1,247 | 0.16 |
| Brentwood High School | 3 | Public | 9-12 | 4,641 | 1.00 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.46 |
| Brentwood Res Center | NR | Public | 9-10, 12 | 11 | 2.08 |
| Ascent School for Individuals With Autism | NR | Private | 4-12 | 24 | 2.88 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 5 William Street, Brentwood.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 284 Ellery St, Brentwood | 12/04/2019 | ||
| 27 Dione Ln, Hauppauge | 2,283 | 07/22/2021 | $650,000 |
| 132 Charter Oaks Ave, Brentwood | 2,010 | 12/23/2016 | $230,000 |
| 2402 Ocean Ave, Ronkonkoma | 11,608 | 08/01/2019 | $2,675,000 |
| 95 Connetquot Rd, Bayport | 10/14/1998 | $181,000 | |
| 1420 St Louis Ave, Bay Shore | 05/07/2002 | ||
| 20 Wyandanch Ave, East Islip | 06/30/2010 | $410,000 | |
| 8 19th Ave, Bay Shore | 03/31/2017 | $455,000 | |
| 33 Gates Ave, Brentwood | 11/08/2010 | $162,000 | |
| 99 California Ave, Bay Shore | 10/15/1998 | $157,000 | |
| 32 Orient Ave, Brentwood | 07/10/2013 | ||
| 315 Hancock St, Brentwood | 1,032 | 08/28/2025 | |
| 217 Clark St, Brentwood | 05/23/2007 | ||
| 74 Westwood Dr, Brentwood | 02/24/2006 | $448,000 | |
| 40 Wagstaff Ln, West Islip | 06/06/2022 | $785,000 | |
| 220 F Springmeadow Dr, Holbrook | 1,313 | 01/14/2020 | $340,000 |
| 6 Dartmouth Dr, Bay Shore | 09/30/2002 | $205,000 | |
| 126 Charter Oaks Ave, Brentwood | 01/05/2017 | $275,000 | |
| 77 Yarnell St, Brentwood | 03/17/2005 | $380,000 | |
| 44 Edgewood Ave, Oakdale | 01/22/2010 | $905,000 |