Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
676 Union Street

For Sale · Listing by Corcoran Group

676 Union Street

Park Slope, Brooklyn

$6,295,000

Interested in this property?

$6,295,000

$772 per sq ft

676 Union Street

Park Slope, Brooklyn

MLS® #RLS20125461

RLS at REBNY

Listing by Corcoran Group

Open House Scheduled

Sunday, November 8 • 12:00 PM – 1:30 PM

REBNY 2025: signed Buyer Representation Agreement required before any showing.

6
Bedrooms
4.5
Baths
8,150
Sq. Ft.
1920
Year Built

Quick Summary

Bedrooms 6
Bathrooms 5 full, 1 half
Living Area 8,150 sq ft
Lot Size 2,000 sq ft
Year Built 1920
Ownership None
Property Taxes $14,661.12/yr
Neighborhood Park Slope
Floor 1 of 5

Property Highlights

  • Views: Garden, Neighborhood, Skyline
  • Exposure: North,South facing
  • Fireplace: 1 fireplace

Property Details

Type Single Family Residence
Ownership None
Total Rooms 14
Baths 4 Full, 1 Half
Floor 1 of 5
View Garden, Neighborhood, Skyline
Exposure North,South
Pets Yes
Year Built 1920
Living Area 8,150 sq ft
Architectural Style Loft
Structure Type MultiFamily,MixedUse,Townhouse
Flooring Hardwood
Furnished Unfurnished
Lot Size 2,000 sq ft
Parcel # 00955-0037
Block/Lot 00955/0037

Listing History

Event Date Price Change
Listed Nov 5, 2026 $6,295,000 -
Currently Nov 6, 2026 $6,295,000 -

Description

A SoHo-style loft in the heart of Park Slope? It's an extraordinary proposition, and 676 Union Street delivers it on a remarkable scale. Behind its classic Brooklyn facade lies a rare five-story building defined by expansive, 25-foot-wide floor plates, soaring ceilings, abundant natural light, and the kind of wide-open spaces more commonly associated with the loft buildings of downtown Manhattan. Measuring 25 feet wide by 55 feet deep, this is a property that invites imagination, offering the freedom to create an extraordinary single-family home, a multifamily compound, or a combination of living and creative spaces unlike anything else available in brownstone Brooklyn. Currently configured as two expansive duplex residences above a ground-floor loft atelier, the building offers an unusual degree of flexibility. The ground level, with its open layout lends itself to a range of possibilities—from a gallery to a creative workspace, retail setting, office or residential space. Beyond the atelier is a lush garden enclosed by mature greenery and climbing ivy feels wonderfully removed from the city and has a generous paved terrace for outdoor dining and entertaining. The second and third floors comprise a sprawling two-bedroom, two-bathroom duplex with the unmistakable character of a true loft. Expansive open spaces, high ceilings, and generous windows with northern and southern exposures on both levels bring wonderful natural light throughout the day, enhancing the sense of volume and freedom. Currently incorporating an expansive artist studio, the duplex offers an inspiring setting for creative pursuits alongside comfortable residential living, with the flexibility to reconfigure the studio spaces into additional bedrooms, creating a three- or four-bedroom home. Warm wood floors, an open kitchen, wood-burning fireplace and built-in shelving add character throughout. Above, the fourth and fifth floors form an equally compelling four-bedroom, two-bathroom duplex, where expansive living spaces and beautifully proportioned rooms are complemented by distinctive architectural details. The uppermost floor is particularly striking, with soaring 13-foot ceilings, graceful arched windows, and amazing skyline views. Dual exposures and a dramatic skylight create an extraordinary sense of light and volume while the fireplace and hardwood floors add warmth and character. The existing walkout bulkhead makes it an easy addition to create a magical roof deck adds yet another exciting dimension. A full basement with good ceiling heights and solid mechanicals provides substantial utility and additional storage space. The real magic of 676 Union Street lies in what it could become. Imagine an expansive private residence with an entire floor devoted to art, music, or creative work. A multigenerational compound with generous independent living spaces. A gallery or atelier below and spectacular loft residences above. The scale, openness, and versatility make these possibilities especially compelling, offering a canvas rarely encountered in Park Slope. All of this is set in the heart of Park Slope, where the timeless charm of classic Brooklyn brownstone living meets one of the city's most vibrant dining and cultural scenes. Neighborhood favorites including al di la, Haenyo, Palo Santo, and Mars Cafe are all nearby, along with an eclectic mix of independent shops, cafés, and local destinations that give the neighborhood its unmistakable character. With the R train less than a block away, convenience is equally compelling. For those who have always dreamed of the freedom and volume of a downtown loft without sacrificing the charm and lifestyle of Park Slope. We look forward to showing this rare opportunity with you. All showings by appointment only.

Features & Amenities

Interior Features

Built In Features High Ceilings In Unit See Remarks Flooring: Hardwood Skylights Fireplace (1)

Exterior Features

Building Garden Private Entrance Private Outdoor Space Over60 Sqft

Building Information

Building Data View Compliance & Permits
Total Units 2
Stories 5
Structure MultiFamily,MixedUse,Townhouse
Style Loft

Financial Details

RE Taxes $14,661.12/yr ($1,222/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

103

Median Asking Price

$1.85M

Median $/Sqft

$1,396

Avg Days on Market

N/A

New This Week

8

Price Reduced

18%

Sold (30 Days)

26

Median Sale Price

$1.70M

Live data from RLS at REBNY • Updated 11/5/26, 8:26 PM EST

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Location

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676 Union Street, Park Slope, Kings County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1920
Year Built
106 years old
5
Floors
2
Residential Units
R6A
Zoning District
Primarily Residential Mixed Use

Tax & Assessment

Assessed Value: $422,280
Land Value: $27,300
Exemptions: $0

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

Lot Area: 2,000 SF
Building Area: 6,500 SF
Built FAR: 3.25
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 common charges are $0 per month. Confirm the exact amount with Milton Coste before making an offer.

The current listed annual property tax is $14,661.12, or roughly $1,222 per month. Verify the current assessment with your attorney before closing.

This property has 6 bedrooms and 4 full bathrooms and 1 half bathroom.

The listed interior living area is 8,150 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1920, making it approximately 106 years old.

This listing is None

Pet policy requires confirmation with Milton Coste.

At the current list price of $6,295,000 for 8,150 sq ft, the asking price per square foot is approximately $772. 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: RLS20125461
First Listed: 11/5/2026
On Market: 11/5/2026
Price Changed: 11/5/2026
Contract Date: 10/26/2026

Listing Courtesy of Corcoran Group - Behzad Amiri

Listing Contact: (718) 810-4012

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.

How working with a buyer's agent works: I work for you, not the seller. Before I show you anything, New York brokerage rules ask us to put that in writing: an agreement and a disclosure that say I work for you and negotiate on your behalf. The agreement is non-exclusive: you can work with other agents, it runs for a short fixed term we agree on, and you can end it with a note. You may attend open houses independently without an agreement. Read how it works

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 11/6/2026 at 1:26 AM UTC

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Milton Coste - NYC Real Estate Broker

Milton Coste

Licensed Real Estate Associate Broker

Keller Williams NYC

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Sale history, taxes, violations and comps for this unit

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Park Slope Market Update

26 sales last 30 days · $1.85M median · 4 months supply

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New listings in this neighborhood

Quick Facts

Status Active Type Single Family Residence Neighborhood Park Slope Borough Brooklyn
County Kings
Floor 1 of 5
Year Built 1920
First Listed 11/5/2026
Style Loft
Living Area 8,150 sqft
Annual Tax $14,661.12

Monthly Costs Estimate

Down Payment 20%

$1,259,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Est. Taxes $1,222
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 $5M to $9,999,999 at 2.25%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$141,638

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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