| Primary address | 300 Union Street |
| Neighborhood | Carroll Gardens |
| Zip code | 11231 |
| Borough | Brooklyn |
| Block & lot | 00435-0013 |
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 | $11,320 |
| Lot sq. ft. | 2,200 |
| Lot dimensions | |
| Property type | Four Families (C3)
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| Building sqft | 2,970 |
| Building dimensions | |
| Buildings on lot | 1 |
| Stories | 3 |
| Structure type | Walk-up apartment |
| Building material | Stone |
| Year built | 1920 |
| Frontage | Union Street (narrow) |
| Nearest wide street | Court Street |
| Distance to wide street | Register |
| School district | 15 |
| Community district | 6 |
| Closest police station | 0.27 Miles |
| Closest fire station | 0.53 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:
300 Union Street, Brooklyn, NY 11231 was built in 1920 and has a total of 2,970 square feet.
What is the assessed value of 300 Union Street, Brooklyn, NY 11231 and the property tax paid?Assessed at $898,200, the tax amount paid for 300 Union Street, Brooklyn, NY 11231 is $10,481. For the next year, the tax amount for 300 Union Street, Brooklyn, NY 11231 is estimated at $11,320.
When was 300 Union Street, Brooklyn, NY 11231 last sold?300 Union Street, Brooklyn, NY 11231 was last sold in 12/23/1997.
How many residential units does this building have?This building has 4 residential unit(s).
View property contacts like owners, building management, representatives from permits and tenants with a free account. For LLC-owned properties, access manually researched real owners and phone numbers.
Create a free account to view the complete sales history for 300 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 300 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: | $10,482 |
| Estimated property tax: | $11,320 |
| Tax assessor's market value: | $1,996,000 |
| Assessed value: | $898,200 |
Here's the assessment & property tax history for 300 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 | $1,996,000 | $898,200 | $84,265 | 12.439% | $10,482 | $10,482 | +7.43% |
| 2024/25 | $1,663,200 | $748,440 | $78,052 | 12.5% | $9,757 | $9,757 | +7.97% |
| 2023/24 | $1,386,000 | $623,700 | $72,281 | 12.502% | $9,037 | $9,037 | +1.92% |
| 2022/23 | $1,155,000 | $519,750 | $72,281 | 12.267% | $8,867 | $8,867 | +3.52% |
| 2021/22 | $923,900 | $415,755 | $70,004 | 12.235% | $8,565 | $8,565 | +7.72% |
The complete history of permits filed for 300 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 Carroll Gardens so you can assess current trends, home values, types of properties sold and transaction volume.
View the median home sale price in Carroll Gardens 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) |
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Distance to Subway
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| Closest station | Smith St & President St at NW Corner | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Station lines | F-G | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distance (miles) | 0.079 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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 | 0.24 |
| P.S. 32 Samuels Mills Sprole | 6 | Yes | Public | PK, K-5 | 452 | 0.24 |
| P.S. 58 The Carroll | 8 | No | Public | PK, K-5 | 751 | 0.11 |
| P.S. 58 The Carroll | 8 | No | Public | PK, K-5 | 751 | 0.11 |
| Pache Montessori | NR | No | Private | PK-K | 122 | 0.16 |
| 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 | 0.16 |
| School For International Studies | 5 | No | Public | 6-12 | 782 | 0.23 |
| Brooklyn Secondary School For Collaborative Studie | 6 | No | Public | 6-12 | 671 | 0.39 |
| Mary McDowell Friends School | NR | No | Private | 6-10 | 290 | 0.40 |
| International School of Brooklyn | NR | No | Private | PK, K-8 | 0 | 0.41 |
| Name | Rating | Att. zoned | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|---|
| Digital Arts and Cinema Technology High School | 8 | No | Public | 9-12 | 331 | 0.23 |
| School For International Studies | 5 | No | Public | 6-12 | 782 | 0.23 |
| New Dawn Charter High School | 2 | No | Charter | 9-12 | 233 | 0.28 |
| Cobble Hill School of American Studies | 1 | No | Public | 9-12 | 316 | 0.31 |
| Brooklyn Secondary School For Collaborative Studie | 6 | No | Public | 6-12 | 671 | 0.39 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Here are the neighbors for 300 Union Street, Brooklyn, NY 11231.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 316 Union St, Brooklyn | 4,400 | 03/13/2024 | |
| 298 Union St, Brooklyn | 3,510 | 08/02/2017 | $3,750,000 |
| 359 Court St, Brooklyn | 4,400 | 09/15/2025 | |
| 308 Union St, Brooklyn | 3,300 | 11/07/1991 | |
| 361 Court St, Brooklyn | 11,186 | 08/14/2019 | $8,700,000 |
| 320 Union St, Brooklyn | 3,300 | 09/26/2024 | $3,400,000 |
| 296 Union St, Brooklyn | 3,146 | 08/16/1977 | |
| 349 Court St, Brooklyn | 4,200 | 09/24/2014 | |
| 347 Court St, Brooklyn | 3,600 | 05/11/2021 | |
| 345 Court St, Brooklyn | 4,100 | 09/24/2014 | |
| 357 Court St, Brooklyn | 4,400 | 09/19/2024 | |
| 302 Union St, Brooklyn | 3,964 | 10/11/1996 | |
| 306 Union St, Brooklyn | 4,620 | 11/20/2019 | |
| 312 Union St, Brooklyn | 3,300 | 03/27/2023 | |
| 304 Union St, Brooklyn | 3,300 | 03/12/2013 | |
| 318 Union St, Brooklyn | 3,300 | 01/30/2017 | $3,300,000 |
| 353 Court St, Brooklyn | 4,200 | 10/29/2019 | |
| 310 Union St, Brooklyn | 3,300 | 11/16/2012 | $3,195,000 |
| 314 Union St, Brooklyn | 3,658 | 04/08/1986 | |
| 355 Court St, Brooklyn | 5,203 | 04/11/2023 | $3,500,000 |
