860 Union St Brooklyn, NY 11215
Park Slope NeighborhoodEstimated payment $22,034/month
Highlights
- Wood Flooring
- Cooling Available
- Laundry Facilities
- P.S. 321 William Penn Rated A
- Hot Water Heating System
- Back Yard
About This Home
Welcome to your home in the Park Slope neighborhood of Brooklyn, New York City was built as the Victorian Gothic carriage house of the Maxwell mansion, which was built sometime between 1875 and 1896, and was torn down in 1922. The 25’ ft wide carriage house received a new facade in 1923 designed by Caughey & Evans. The building is one of the few carriage houses in Park Slope; and is a local attraction, which dazzles its passersby. It is located in the Park Slope Historic District (minutes from the park). This awe-inspiring magnificent architectural masterpiece is majestically steeped in exquisite original word work & finely crafted detail throughout (mantle fireplaces, built-in China cabinets, parquet floors, stained glass, towering, tall ceilings, and more). Currently configured as a two-family residence with 3 ensuite bedrooms, formal living, formal dining room & kitchen for each unit- or perfectly ideal as a conversion to the ultimately sublime single-family mansion. This stunning and ultra-unique property is a must see to believe and appreciate. Profound possibilities and potential await with this work of art piece of landmarked real estate gold. Situated in the heart of prime Park Slope- surrounded by the most exciting and essential amenities of Brooklyn’s most desirable & sought-after neighborhoods. An absolutely outstanding opportunity to own a once-in-a-lifetime historic home that will be become your legacy.
Some Photos are Staged.
Listing Agent
RE/MAX Real Estate Professionals License #40AP1037712 Listed on: 05/14/2025
Property Details
Home Type
- Multi-Family
Est. Annual Taxes
- $24,181
Lot Details
- 2,610 Sq Ft Lot
- Lot Dimensions are 90 x 29
- Back Yard
Parking
- On-Street Parking
Home Design
- Flat Roof Shape
- Brick Exterior Construction
- Poured Concrete
Interior Spaces
- 3,894 Sq Ft Home
- 2-Story Property
- Window Treatments
- Wood Flooring
- Basement Fills Entire Space Under The House
- Stove
- Washer
Bedrooms and Bathrooms
- 6 Bedrooms
- 6 Full Bathrooms
Utilities
- Cooling Available
- Hot Water Heating System
- Heating System Uses Gas
- Gas Water Heater
Community Details
- 2 Units
- Laundry Facilities
- 2 Vacant Units
Listing and Financial Details
- Tax Block 1065
Map
Home Values in the Area
Average Home Value in this Area
Tax History
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2026 | $25,627 | $296,040 | $50,220 | $245,820 |
| 2025 | $24,181 | $333,240 | $50,220 | $283,020 |
| 2024 | $24,181 | $263,220 | $50,220 | $213,000 |
| 2023 | $24,450 | $275,520 | $50,220 | $225,300 |
| 2022 | $23,848 | $256,920 | $50,220 | $206,700 |
| 2021 | $23,719 | $224,520 | $50,220 | $174,300 |
| 2020 | $11,123 | $272,220 | $50,220 | $222,000 |
| 2019 | $20,987 | $301,020 | $50,220 | $250,800 |
| 2018 | $20,452 | $100,327 | $19,384 | $80,943 |
| 2017 | $20,293 | $99,549 | $20,126 | $79,423 |
| 2016 | $18,776 | $93,921 | $21,555 | $72,366 |
| 2015 | $11,327 | $88,606 | $22,701 | $65,905 |
| 2014 | $11,327 | $83,606 | $20,834 | $62,772 |
Property History
| Date | Event | Price | List to Sale | Price per Sq Ft |
|---|---|---|---|---|
| 04/30/2026 04/30/26 | Price Changed | $3,750,000 | -2.6% | $963 / Sq Ft |
| 04/28/2026 04/28/26 | Price Changed | $3,850,000 | -0.6% | $989 / Sq Ft |
| 04/23/2026 04/23/26 | Price Changed | $3,875,000 | -0.6% | $995 / Sq Ft |
| 03/11/2026 03/11/26 | Price Changed | $3,900,000 | -1.3% | $1,002 / Sq Ft |
| 03/05/2026 03/05/26 | Price Changed | $3,950,000 | -0.6% | $1,014 / Sq Ft |
| 03/03/2026 03/03/26 | Price Changed | $3,975,000 | -0.4% | $1,021 / Sq Ft |
| 02/26/2026 02/26/26 | Price Changed | $3,990,000 | -0.1% | $1,025 / Sq Ft |
| 02/13/2026 02/13/26 | Price Changed | $3,995,000 | -0.1% | $1,026 / Sq Ft |
| 02/09/2026 02/09/26 | Price Changed | $3,999,000 | -6.9% | $1,027 / Sq Ft |
| 01/20/2026 01/20/26 | Price Changed | $4,295,000 | -0.1% | $1,103 / Sq Ft |
| 01/15/2026 01/15/26 | Price Changed | $4,299,000 | 0.0% | $1,104 / Sq Ft |
| 01/08/2026 01/08/26 | Price Changed | $4,300,000 | -4.4% | $1,104 / Sq Ft |
| 12/15/2025 12/15/25 | Price Changed | $4,500,000 | -5.3% | $1,156 / Sq Ft |
| 10/31/2025 10/31/25 | Price Changed | $4,750,000 | -4.0% | $1,220 / Sq Ft |
| 10/09/2025 10/09/25 | Price Changed | $4,950,000 | -8.3% | $1,271 / Sq Ft |
| 08/18/2025 08/18/25 | Price Changed | $5,400,000 | -6.1% | $1,387 / Sq Ft |
| 05/14/2025 05/14/25 | For Sale | $5,750,000 | -- | $1,477 / Sq Ft |
Purchase History
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Type | Sale Price | Title Company |
|---|---|---|---|
| Interfamily Deed Transfer | -- | -- | |
| Interfamily Deed Transfer | -- | -- | |
| Deed | $2,500,000 | -- | |
| Deed | $2,500,000 | -- | |
| Interfamily Deed Transfer | -- | Chicago Title Insurance Co | |
| Interfamily Deed Transfer | -- | Chicago Title Insurance Co |
Source: Brooklyn Board of REALTORS®
MLS Number: 492575
APN: 01065-0026
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