| Primary address | 21 Montgomery Street, Brentwood |
| Zip code | 11717 |
| County | Suffolk |
| Municipality | Islip |
| Parcel ID | 114-3-59 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 12/31/1992 |
| Sale price | $108,000 |
| Arm's length | Register |
| Property tax | $7,298 |
| Building class | Two Family Year-Round Residence (220) |
| Acreage | 0.25 |
| 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:
Assessed at $31,100, the tax amount paid for 21 Montgomery Street, Brentwood, NY 11717 is $7,297.
When was 21 Montgomery Street, Brentwood, NY 11717 last sold?21 Montgomery Street, Brentwood, NY 11717 was last sold in 12/05/2014.
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 21 Montgomery Street, Brentwood, including title documents, transfer conditions, mortgages and liens.
| Purchase date | Purchase price | Buyer name | Seller name |
|---|---|---|---|
| 12/31/1992 | $108,000 | 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 21 Montgomery 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 | $7,298 |
| Market value | $438,028 |
| Assessed value | $31,100 |
Here's the assessment & property tax history for 21 Montgomery 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 | $438,028 | $31,100 | 22.743 | $7,073 | +4.85% |
| 2023-2024 | $427,197 | $31,100 | 21.691 | $6,746 | -0.19% |
| 2022-2023 | $375,604 | $31,100 | 21.733 | $6,759 | +2.00% |
| 2021-2022 | $335,130 | $31,100 | 21.306 | $6,626 | +1.39% |
| 2020-2021 | $320,619 | $31,100 | 21.013 | $6,535 | +4.58% |
The complete history of permits filed for 21 Montgomery 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 21 Montgomery 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 21 Montgomery 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 | 0.69 |
| Pine Park Elementary School | NR | Public | K-1 | 534 | 0.78 |
| North Elementary School | 4 | Public | 1-5 | 855 | 1.38 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.70 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.70 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Freshman Center | NR | Public | 9 | 1,247 | 0.36 |
| North Middle School | 4 | Public | 6-8 | 1,131 | 0.81 |
| South Middle School | 3 | Public | 6-8 | 1,033 | 1.57 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.70 |
| East Middle School | 4 | Public | 6-8 | 1,159 | 2.01 |
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Freshman Center | NR | Public | 9 | 1,247 | 0.36 |
| Brentwood High School | 3 | Public | 9-12 | 4,641 | 1.09 |
| MDQ Academy | NR | Private | PK-12 | 412 | 1.70 |
| Brentwood Res Center | NR | Public | 9-10, 12 | 11 | 1.72 |
| Ascent School for Individuals With Autism | NR | Private | 4-12 | 24 | 2.38 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 21 Montgomery Street, Brentwood.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 736 Hyman Ave, West Islip | 04/13/2007 | $400,000 | |
| 122 Sherman St, Brentwood | 1,596 | 04/27/2018 | $350,000 |
| 6 Islip Ave, Brentwood | 01/19/2024 | $380,000 | |
| 21 Beech St, Bay Shore | 08/19/2004 | ||
| 583 Montauk Hwy, Oakdale | 18,550 | 02/07/2024 | |
| 124 Madison Ave, Brentwood | 06/09/2010 | ||
| 132 Snedecor Ave, Bayport | 10/17/2003 | $325,000 | |
| 274 Astor Dr, Sayville | 12/03/2010 | $499,000 | |
| 65 Bushwick Ave, Central Islip | 12/10/2014 | ||
| 1993 Lincoln Ave, Holbrook | 1,512 | 03/25/2020 | $420,000 |
| 21 Academy Ln, Oakdale | 1,075 | 06/08/2022 | |
| 205 New York Ave, Bay Shore | 07/23/2002 | $252,500 | |
| 18 Bertram St, Islip | 05/17/2010 | ||
| 144 Grand Blvd, Brentwood | 06/28/2002 | ||
| 1312 Potter Blvd, Bay Shore | 02/07/2007 | $265,000 | |
| 120 Guilford Ave, Oakdale | 07/09/2002 | $150,000 | |
| 489 Peconic St, Ronkonkoma | 1,634 | 10/22/2018 | $310,000 |
| 34 Henry St, Sayville | 07/19/2002 | $160,000 | |
| 232 Northfield Rd, Hauppauge | 03/16/2015 | $355,000 | |
| 321 Southport St, Ronkonkoma | 2,482 | 09/05/2023 | $635,000 |