| Primary address | 423 Union Street |
| Neighborhood | Gowanus |
| Zip code | 11231 |
| Borough | Brooklyn |
| Block & lot | 00430-0074 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Tax class | Register |
| Estimated property tax | $6,893 |
| Lot sq. ft. | 2,000 |
| Lot dimensions | |
| Property type | Two Family Brick (B1)
|
| Building sqft | 2,280 |
| Building dimensions | |
| Buildings on lot | 1 |
| Stories | 2 |
| Structure type | Brownstone |
| Building material | Brick |
| Exterior wall | Brick/masonry |
| Basement type | Full |
| Year built | 1899 |
| Frontage | Union Street (narrow) |
| Nearest wide street | Hoyt Street |
| Distance to wide street | Register |
| School district | 15 |
| Community district | 6 |
| Closest police station | 0.50 Miles |
| Closest fire station | 0.60 Miles |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
New York property reports include comprehensive occupancy, development and violation information. Create a free account to access valuable data points such as:
423 Union Street, Brooklyn, NY 11231 was built in 1899 and has a total of 2,280 square feet.
What is the assessed value of 423 Union Street, Brooklyn, NY 11231 and the property tax paid?Assessed at $147,540, the tax amount paid for 423 Union Street, Brooklyn, NY 11231 is $6,505. For the next year, the tax amount for 423 Union Street, Brooklyn, NY 11231 is estimated at $6,893.
When was 423 Union Street, Brooklyn, NY 11231 last sold?423 Union Street, Brooklyn, NY 11231 was last sold in 05/26/1999.
How many residential units does this building have?This building has 2 residential unit(s).
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Create a free account to view the complete sales history for 423 Union Street, Brooklyn, including title documents, transfer conditions, mortgages, liens, and pre-foreclosures.
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 423 Union Street, Brooklyn, NY 11231. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025-2026 |
| Property tax: | $6,505 |
| Estimated property tax: | $6,893 |
| Tax assessor's market value: | $2,459,000 |
| Assessed value: | $147,540 |
Here's the assessment & property tax history for 423 Union Street, Brooklyn, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessed value | Taxable | Tax rate % | Base tax | Property tax | Year over year change |
|---|---|---|---|---|---|---|---|
| 2025/26 | $2,459,000 | $147,540 | $32,784 | 19.843% | $6,505 | $6,505 | +4.64% |
| 2024/25 | $2,628,000 | $157,680 | $30,954 | 20.085% | $6,217 | $6,217 | +5.87% |
| 2023/24 | $3,224,000 | $193,440 | $29,237 | 20.085% | $5,872 | $5,872 | -1.10% |
| 2022/23 | $2,732,000 | $163,920 | $29,237 | 20.309% | $5,938 | $5,938 | +2.75% |
| 2021/22 | $2,411,000 | $144,660 | $28,949 | 19.963% | $5,779 | $5,779 | +0.51% |
The complete history of permits filed for 423 Union Street, Brooklyn, 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.
Access a detailed real estate market overview of Gowanus so you can assess current trends, home values, types of properties sold and transaction volume.
View the median home sale price in Gowanus and compare it to other neighborhoods in Brooklyn.
Check out recently sold homes in Brooklyn and see how their prices compare.
| FEMA flood zone(s): | X (See more on map) |
| Hurricane evacuation zone: | 2 (See more on map) |
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Distance to Subway
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| Closest station | Smith St & President St at NE Corner | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Station lines | F-G | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distance (miles) | 0.159 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Name | Rating | Att. zoned | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|---|
| P.S. 32 Samuels Mills Sprole | 6 | Yes | Public | PK, K-5 | 452 | 0.04 |
| P.S. 32 Samuels Mills Sprole | 6 | Yes | Public | PK, K-5 | 452 | 0.04 |
| P.S. 58 The Carroll | 8 | No | Public | PK, K-5 | 751 | 0.23 |
| P.S. 58 The Carroll | 8 | No | Public | PK, K-5 | 751 | 0.23 |
| Hannah Senesh Community Day School | NR | No | Private | K-8 | 231 | 0.25 |
| Name | Rating | Att. zoned | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|---|
| Hannah Senesh Community Day School | NR | No | Private | K-8 | 231 | 0.25 |
| School For International Studies | 5 | No | Public | 6-12 | 782 | 0.31 |
| P.S. 372 The Children S School | NR | No | Public | PK, K-8 | 436 | 0.42 |
| Mary McDowell Friends School | NR | No | Private | 6-10 | 290 | 0.46 |
| Al-Madinah School | NR | No | Private | PK-12 | 790 | 0.47 |
| Name | Rating | Att. zoned | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|---|
| New Dawn Charter High School | 2 | No | Charter | 9-12 | 233 | 0.16 |
| Cobble Hill School of American Studies | 1 | No | Public | 9-12 | 316 | 0.28 |
| School For International Studies | 5 | No | Public | 6-12 | 782 | 0.31 |
| Digital Arts and Cinema Technology High School | 8 | No | Public | 9-12 | 331 | 0.31 |
| Mary McDowell Friends School | NR | No | Private | 6-10 | 290 | 0.46 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 423 Union Street, Brooklyn, NY 11231.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 415 Union St, Brooklyn | 3,000 | 01/11/2010 | |
| 425 Union St, Brooklyn | 2,760 | 01/12/2024 | |
| 431 Union St, Brooklyn | 2,280 | 08/04/2011 | |
| 287 Bond St, Brooklyn | 6,200 | 01/01/2018 | |
| 429 Union St, Brooklyn | 3,165 | 12/19/1977 | |
| 433 Union St, Brooklyn | 1,938 | 11/08/2023 | $1,875,000 |
| 441 Union St, Brooklyn | 1,824 | 08/28/2024 | |
| 419 Union St, Brooklyn | 3,040 | 04/02/2009 | $1,810,000 |
| 437 Union St, Brooklyn | 2,723 | 03/04/2016 | |
| 295 Bond St, Brooklyn | 1,472 | 07/09/2013 | $1,900,000 |
| 498 Sackett St, Brooklyn | 8,978 | 05/19/2023 | $100,000,000 |
| 427 Union St, Brooklyn | 3,165 | 03/09/2016 | $2,760,000 |
| 439 Union St, Brooklyn | 1,824 | 08/28/2024 | |
| 421 Union St, Brooklyn | 2,289 | 09/06/2001 | |
| 417 Union St, Brooklyn | 2,400 | 12/26/2024 | $3,325,000 |
| 443 Union St, Brooklyn | 1,760 | 06/15/1995 | |
| 305 Bond St, Brooklyn | 4,000 | 03/31/2017 | $10,000 |
| 303 Bond St, Brooklyn | 3,600 | 09/17/2020 | $4,361,563 |
| 297 Bond St, Brooklyn | 1,472 | 02/28/2017 | $25,000 |
| 435 Union St, Brooklyn | 2,972 | 10/25/2022 |
