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    860 Union St Brooklyn, NY 11215

    For Sale
    $4,750,000

    Multi-Unit (2-4) - Brooklyn, NY

    Property size:
    3,894 SF
    Days on Market:
    39
    Last Refresh:
    Dec 8 at 7:06 am

    Property Features for 860 Union St

    General Information

    Property type
    Residential Multi Family
    Property subtype
    Other
    Standard status
    Active
    Zoning
    100
    Rooms
    Basement, Bathroom 1, Bathroom 2, Bathroom 3, Bathroom 4, Bathroom 5, Bedroom 1, Bedroom 2, Bedroom 3, Bedroom 4, Bedroom 5, Dining Room, Kitchen, Living Room
    Bedrooms
    6
    Bathrooms
    6
    Parking features
    Garage
    Basement Y/N
    1
    Appliances
    Refrigerator
    Size
    3,894 SF

    Utilities

    Heating system
    Natural Gas

    Building Details

    Floors in Building
    2
    Flooring type
    Hardwood
    Building materials
    Brick
    Roof type
    Flat
    Architectural style
    Other

    REMAX REAL ESTATE PROFESSIONALS (718) 887-5708

    Listing agent Vito Angelo (718) 887-5708

    Listing date Oct 31, 2025

    MLS# 11505049 Listing URL

    Copyright © 2025 My State MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    Overview

    Historic Park Slope Carriage House

    Located in the Park Slope neighborhood of Brooklyn, this property was originally built as the Victorian Gothic carriage house of the Maxwell mansion, constructed between 1875 and 1896 and demolished in 1922. The 25-foot wide carriage house received a new facade in 1923 designed by Caughey & Evans. As one of the few remaining carriage houses in Park Slope, it is considered a local attraction. Situated within the Park Slope Historic District, it is located minutes from the park. The building is currently configured as a two-family residence, featuring three ensuite bedrooms, a formal living room, a formal dining room, and a kitchen in each unit. It offers potential for conversion into a single-family mansion. The property contains original woodwork and crafted details, including mantle fireplaces, built-in China cabinets, parquet floors, stained glass, and tall ceilings. Located in the heart of prime Park Slope, the property is surrounded by amenities. The property size is 3894 square feet.
    Property Profile Location Intelligence

    Current Use by Public Records

    Duplexes

    Suggested Use

    Law Firm Restaurant Realty agency Spa & Massage Hair Salon Dental Office Nail Salon Clothing Store Food Market Grocery Store

    Zoning and permitted uses should be independently verified with local authorities.

    Location Insight

    • Map
    • Local Demand
    City
    Brooklyn
    County
    Kings
    State
    New York
    Longitude
    -73.973806
    Latitude
    40.673574

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    FAQs

    What type of property is this?
    Duplex - Unique two-family residence or single-family conversion opportunity in prime location.
    Where is this duplex located?
    The property is located at 860 Union St Brooklyn, NY.
    What is the asking price?
    The asking price for this property is $4,750,000.
    What are key features of this property?
    This property features: - Rare 25' wide Victorian Gothic carriage house in the Park Slope Historic District.; - Potential for conversion to a sublime single-family mansion.; - Original architectural details: **mantle fireplaces, built-in China cabinets, parquet floors, stained glass, tall ceilings.**
    (718) 887-5708
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    Brooklyn, NY 11215
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    Realmo Value Estimation

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.

    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.

    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
    860 Union St Brooklyn, NY 11215
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