| Primary address | 21 Leahy Avenue, Brentwood |
| Zip code | 11717 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 114-2-43 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 08/19/2004 |
| Sale price | $298,000 |
| Arm's length | Register |
| Current property tax | $7,960 |
| Building class | One Family Year-Round Residence (210) |
| Acreage | 0.44 |
| 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:
Assessed at $36,500, the tax amount paid for 21 Leahy Avenue, Brentwood, NY 11717 is $8,564.
When was 21 Leahy Avenue, Brentwood, NY 11717 last sold?21 Leahy Avenue, Brentwood, NY 11717 was last sold in 12/06/2023.
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 21 Leahy Avenue, Brentwood, 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 21 Leahy Avenue, Brentwood, NY 11717. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year | 2025-2026 |
| Base tax | $8,565 |
| Current property tax | $7,960 |
| Market value | $514,084 |
| Assessed value | $36,500 |
Here's the assessment & property tax history for 21 Leahy 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 | $514,084 | $36,500 | 22.743 | $8,301 | +4.85% |
| 2023-2024 | $501,373 | $36,500 | 21.691 | $7,917 | -0.19% |
| 2022-2023 | $440,821 | $36,500 | 21.733 | $7,933 | +2.00% |
| 2021-2022 | $393,319 | $36,500 | 21.306 | $7,777 | +1.39% |
| 2020-2021 | $376,289 | $36,500 | 21.013 | $7,670 | +4.58% |
The complete history of permits filed for 21 Leahy 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 21 Leahy 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 21 Leahy 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 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Twin Pines Elementary School | 4 | Public | 1-5 | 744 | 0.27 |
| Pine Park Elementary School | NR | Public | K-1 | 534 | 0.35 |
| North Elementary School | 4 | Public | 1-5 | 855 | 1.13 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.39 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.39 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Freshman Center | NR | Public | 9 | 1,247 | 0.17 |
| North Middle School | 4 | Public | 6-8 | 1,131 | 0.65 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.39 |
| South Middle School | 3 | Public | 6-8 | 1,033 | 1.39 |
| 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 | 0.17 |
| Brentwood High School | 3 | Public | 9-12 | 4,641 | 0.89 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.39 |
| Brentwood Res Center | NR | Public | 9-10, 12 | 11 | 2.09 |
| Ascent School for Individuals With Autism | NR | Private | 4-12 | 24 | 2.79 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Leahy Avenue, Brentwood.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 179 The Helm, East Islip | 12/22/2003 | ||
| 20 Wainwright St, Ronkonkoma | 11/23/2016 | $375,000 | |
| 49 Pace Dr S, West Islip | 02/20/2007 | $739,000 | |
| 1397 Manatuck Blvd, Bay Shore | 01/25/2002 | ||
| 279 Wurz St, Brentwood | 1,170 | 08/10/2023 | $240,000 |
| 29 Franklin Ave, Brentwood | 02/04/2002 | $211,989 | |
| 3330 Veterans Memorial Hwy, Bohemia | 11,311 | 06/02/2005 | $1,325,000 |
| 146 Pearl St, Ronkonkoma | 06/30/2010 | $299,000 | |
| 97 Yale Ave, Oakdale | 03/26/2018 | $10 | |
| 376 Brook Ave, Bay Shore | 02/16/2010 | $310,000 | |
| 106 N Park Ave, Bay Shore | 1,104 | 09/27/2019 | $308,000 |
| 202 F Springmeadow Dr, Holbrook | 1,109 | 09/07/2017 | $240,000 |
| 15 Cornell St, Islip | 1,152 | 09/13/2019 | $399,999 |
| 4801 Sunrise Hwy, Bohemia | 09/30/2014 | $600,000 | |
| 119 Connecticut Ave, Bay Shore | 03/31/2011 | $151,000 | |
| 24 Locust Ave, Oakdale | 2,384 | 10/12/2017 | $385,000 |
| 1197 Howells Rd, Bay Shore | 04/26/2005 | ||
| 24 Eastview Rd, Ronkonkoma | 1,088 | 07/28/2017 | |
| 148 Seneca St, Ronkonkoma | 02/04/2002 | $235,000 | |
| 152 John St, Hauppauge | 02/15/2002 | $265,000 |