Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
920 Union Street #1A

For Sale · Listing by Compass

920 Union Street #1A

Park Slope, Brooklyn

$1,150,000

Interested in this property?
Active For Sale Co-op

$1,150,000

$958 per sq ft

920 Union Street #1A

Park Slope, Brooklyn

MLS® #RLS20112012

RLS at REBNY

Listing by Compass

Studio
1.5
Baths
1,200
Sq. Ft.
1904
Year Built

Quick Summary

Bedrooms Studio
Bathrooms 2 full, 1 half
Living Area 1,200 sq ft
Lot Size 4,750 sq ft
Year Built 1904
Ownership Co-op
Maintenance $1,638/mo
Neighborhood Park Slope
Floor 1 of 4

Property Highlights

  • Style: Loft architecture
  • Climate Control: Wall Units
  • Character: Pre-war building (1904)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 4
Baths 1 Full, 1 Half
Floor 1 of 4
Cooling Wall Units
Pets Yes, CatsOk, DogsOk
Year Built 1904
Living Area 1,200 sq ft
Architectural Style Loft
Flooring Hardwood
Furnished Unfurnished
Lot Size 4,750 sq ft
Block/Lot 01066/0032

Listing History

Event Date Price Change
Listed Sep 11, 2026 $1,150,000 -
Currently Sep 11, 2026 $1,150,000 -

Description

Offering an exceptional blend of architectural scale, modern functionality, character, and space, this unique tri-level loft measures nearly 1,200 square feet and provides a versatile floor plan tailored to a variety of lifestyles. Architecturally designed as a large studio with 1.5 baths, the unit can function as a 2-bedroom or as a 1-bedroom plus an extra large 2-person home office. The split-level living area features soaring high ceilings, hardwood floors, and custom built-in bookshelves that anchor the expansive room. Overlooking the living space, the primary sleeping loft functions as a private suite equipped with zen Japanese Shoji screens, a walk-in closet, and a full en-suite bathroom. Down the stairs is an eat-in kitchen complete with generous counter space and stainless steel appliances, including a dishwasher and a vented range hood. A powder room is adjacent to the kitchen. Descending to the lower level of the triplex reveals a spacious, highly adaptable bonus room with potential for a home office or secondary sleeping area enclosed by sliding Japanese screens. Thoughtful storage solutions are integrated throughout the immense residence, including custom-built pull-out drawers beneath the staircase. Additional highlights include an in-unit washer and dryer, hardwood floors, and sound-proof double-paned windows with views of the Brooklyn Public Library across Grand Army Plaza. Situated within a well-maintained, dog and cat-friendly Art Nouveau building that was originally built at the turn-of-the-century as the headquarters for the Long Island Automobile Club for early motoring enthusiasts, the building blends rich Park Slope history with modern boutique co-op living. Dedicated storage and bike storage are available, with Prospect Park, major subway lines (2, 3, B, Q), and a Citi Bike station all within immediate reach. Residents enjoy unmatched neighborhood amenities, most notably the renowned Saturday Grand Army Plaza Greenmarket right outside your doorstep.

Features & Amenities

Interior Features

Built In Features High Ceilings Walk In Closets Building Washer Dryer Install Allowed In Unit Flooring: Hardwood Double Pane Windows

Building Amenities

Bike Storage Elevators

Appliances

Stainless Steel Appliances

Building Information

Building Data View Compliance & Permits
Total Units 17
Stories 4
Style Loft

Financial Details

Maintenance $1,638/mo

Park Slope is a well-known Brooklyn neighborhood, recognized for its tree-lined streets and preserved brownstones. Bordering the western edge of Prospect Park, the neighborhood offers convenient access to green space. The real estate market features a mix of historic townhouses, cooperatives, and modern condominiums, within walking distance of the park.

Park Slope Live Market Data

View Neighborhood

Active Listings

67

Median Asking Price

$1.80M

Median $/Sqft

$1,405

Avg Days on Market

N/A

New This Week

26

Price Reduced

15%

Sold (30 Days)

44

Median Sale Price

$1.70M

Live data from RLS at REBNY • Updated 9/11/26, 5:30 PM EST

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Location

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920 Union Street #1A, Park Slope, Kings County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1920
Year Built
106 years old
4
Floors
17
Residential Units
R7B
Zoning District
Elevator Apartments

Tax & Assessment

Assessed Value: $1,705,950
Land Value: $66,150
Exemptions: $26,460

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 4,750 SF
Building Area: 18,000 SF
Built FAR: 3.79
Allowed FAR: 3

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed monthly maintenance are $1,638 per month. Confirm the exact amount with Milton Coste before making an offer.

The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.

This property has 0 bedrooms and 1 full bathroom and 1 half bathroom.

The listed interior living area is 1,200 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1904, making it approximately 122 years old.

This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.

Pets are permitted at this property. Contact Milton Coste for weight limits or breed restrictions.

At the current list price of $1,150,000 for 1,200 sq ft, the asking price per square foot is approximately $958. This figure is for reference only and may differ from appraised or assessed values.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or milton@miltoncoste.com. Per REBNY guidelines effective 2025, a Buyer Representation Agreement is required before a buyer's broker can show you properties. You may attend open houses independently without one.

Have a question not answered here?

(917) 416-7433
MLS® ID: RLS20112012
First Listed: 9/1/2026
On Market: 9/11/2026
Contract Date: 8/24/2026

Listing Courtesy of Compass - Carol Kai-Ju Wang

Listing Contact: (347) 422-7652

Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York's Residential Listing Service (the "RLS"). The information contained in this listing has not been verified by the RLS and should be verified by the consumer. The listing information provided here is for the consumer's personal, non-commercial use. Retransmission, redistribution or copying of this listing information is strictly prohibited except in connection with a consumer's consideration of the purchase and/or sale of an individual property. This listing information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., all rights reserved. This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

Buyer Notice: Planning to work with a buyer's broker? A Buyer Representation Agreement is required before your broker can show you properties, per REBNY/UCBA guidelines (effective 2025). You may attend open houses independently without one.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 9/11/2026 at 9:30 PM UTC

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Park Slope Market Update

44 sales last 30 days · $1.80M median · 1.5 months supply

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New listings in this neighborhood

Quick Facts

Status Active Type Co-op Neighborhood Park Slope Borough Brooklyn
County Kings
Floor 1 of 4
Year Built 1904
First Listed 9/1/2026
Style Loft
Living Area 1,200 sqft
Maintenance $1,638/mo

Monthly Costs Estimate

Down Payment 20%

$230,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $1,638
Total Monthly $0

Estimates only. Consult a lender for exact figures.

Mansion tax applies at this price point

New York State charges the buyer a mansion tax on residential purchases at $1,000,000 or more. At this asking price the tier is $1M to $1,999,999 at 1.00%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$11,500

Run the numbers on a different offer price

Estimate based on the asking price. Confirm your own obligation with your real estate attorney.

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